Please help with 3 Simple Questions!
1. What is the relationship between DNA and gene expression? How do they depend on each other?
2. Why is it important for the “on” and “off” mechanism of gene regulation?
3. Since there are DNA segments that do not code for amino acids, what is their purpose?
**Please use simple answers considering I'm 10th-grade, thank you! <3**
Answers
Answer:
1. Gene expression is the process the cell uses to produce the molecule it needs by reading the genetic code written in the DNA. To do this, the cell interprets the genetic code, and for each group of three letters it adds one of the 20 different amino acids that are the basic units needed to build proteins.
2. gene regulation is at the bottom of what makes a cell decide to become a red blood cell, or a neuron, or a hepatocyte in the liver, or a muscle cell.
3. Most non-coding DNA lies between genes on the chromosome and has no known function. Other non-coding DNA, called introns, is found within genes. Some non-coding DNA plays a role in the regulation of gene expression. Non-coding DNA is just what it says; it's non-coding DNA.
Explanation:
These answers are taken mostly from the net, I try to take from reliable sources, and hopefully this helps!
Related Questions
The following table provides phenotypic data for a population of mammoths living in cold environments based on fossil and DNA evidence.
Characteristic Percent of Population Showing Trait by Generation
Generation 1 Generation 2 Generation 3
Tusks greater than 2.5 m in length 25 25 25
Tusks less than 2.5 m in length 75 75 75
Mass greater than 4,000 kg 15 15 15
Mass less than 4,000 kg 85 85 85
Fur thickness greater than 6 cm 15 25 35
Fur thickness less than 6 cm 85 75 65
Based on this data and your knowledge of natural selection, which explanation best explains the trends seen in the data?
A. Individuals with thicker fur had a survival advantage in the cold environment, allowing these individuals to reproduce more often and create more offspring.
B.Individuals within this population of mammoths tend to only mate with individuals that have thick fur.
C.This population of mammoths appear to be in Hardy-Weinberg equilibrium since no allele frequencies are changing over time.
D.Individuals with thick fur migrated into the population of mammoths, increasing the proportion of these individuals.
PLEASEEE HELPPP MEEEE!!!!
Answers
Answer:
Individuals with thicker fur had a survival advantage in the cold
Explanation:
Natural selection means the process of changing the adapting the new environment. Based on the given data one can conclude that the individual with thicker fur had a survival advantage in the cold environment.
Why natural selection occurs?Natural selection takes place due to 3 underlying reasons:
ReproductionHeredityVariation in fitness of organisms.Due to these reasons, natural selection can leads to speciation.
As the individual are living in cold environment, they need to adapt the change in environment. So, individuals with thicker fur had a survival advantage in the cold environment, allowing these individuals to reproduce more often and create more offsprings.
Thus, option A is correct.
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Name the three things necessary for photosynthesis to occur.
Answers
Answer:
Photosynthesis would need Carbon Dioxide, Water, and Sunlight
what is one rock from the mars
Answers
Answer:
The martian crust is made mostly of basaltic igneous rock composed mostly of feldspar and pyroxene.
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Why use needle loop to prepare fungi slide
Answers
Answer:
It is a safe and convenient way for preparing fungi slide.
Explanation:
Needle loop is used by the scientists when they want to study the structure of fungi under microscope. There are two reasons for using of needle loop in preparing fungi slide. First, it is the safe way in which the chances of contamination is less and secondly, it is a convenient and easier way to place the fungi on the slide of microscope. The needle loop provides more surface area at which more fungi attached to it and place it to the slide.
McKibben lists two effects of climate change that humans are already experiencing. These effects include (check all that apply):
not going into swimming pools in public parks because they are filled with bugs
"not swimming in the ocean because jellyfish, who thrive in warm water because other marine life is killed, will bite"
not walking in meadows because ticks that carry Lyme disease could bite
using inordinate amounts of sunscreen because the burning sun has led to an increase in skin cancer
Answers
The two effects of climate change that humans are already experiencing, according to author and environmentalist Bill McKibben, are:
Before getting started on your concept map, use the activity below to organize your thoughts. Circle the correct option for each statement. OXIDATIVE PHOSPHORYLATION:A metabolic pathway that (OXIDIZES or REDUCES) an energy-rich source to produce ATP.The energy rich source for our cells is glucose, and (ELECTRONS OR PROTONS) are stripped from glucose as it travels through glycolysis and the TCA cycle.Electrons are transferred from electron (DONORS OR ACCEPTORS) to electron (DONORS OR ACCEPTORS).The final electron acceptor is a compound that has a (STRONGER OR WEAKER) reduction potential compared to that of the original electron donor.In aerobic respiration the final electron acceptor is (OXYGEN OR NOT OXYGEN), for anaerobic respiration the final electron acceptor is (OXYGEN OR NOT OXYGEN).As the electrons move through the ETC, energy in the electron is used to pump (ELECTRONS OR PROTONS) across the membrane.The movement of (ELECTRONS OR
Answers
Answer:
Before getting started on your concept map, use the activity below to organize your thoughts. Circle the correct option for each statement. OXIDATIVE PHOSPHORYLATION:A metabolic pathway that (OXIDIZES or REDUCES) an energy-rich source to produce ATP.The energy rich source for our cells is glucose, and (ELECTRONS OR PROTONS) are stripped from glucose as it travels through glycolysis and the TCA cycle.Electrons are transferred from electron (DONORS OR ACCEPTORS) to electron (DONORS OR ACCEPTORS).The final electron acceptor is a compound that has a (STRONGER OR WEAKER) reduction potential compared to that of the original electron donor.In aerobic respiration the final electron acceptor is (OXYGEN OR NOT OXYGEN), for anaerobic respiration the final electron acceptor is (OXYGEN OR NOT OXYGEN).As the electrons move through the ETC, energy in the electron is used to pump (ELECTRONS OR PROTONS) across the membrane.The movement of (ELECTRONS OR
Explanation:
Identify each of the labeled figures. Please help!
Answers
Figure D represents a triglyceride.
What is a triglyceride?Triglycerides are esters that contain a glycerol and three chains of fatty acids, so they are a type of fat that is going to be more commonly contained in the body as fat, since it is going to have as a function the reserve of additional calories that are ingested in the diet and so the body will use it when it requires energy
Triglycerides are found mainly deposited within adipocytes around the body and also traveling through the blood associated with lipoproteins
Triglycerides travel through the blood to the tissues where they are required, but a high amount of triglycerides can become dangerous as it increases the risk of heart disease such as coronary artery disease, type 2 diabetes, hypothyroidism, metabolic syndrome, among others, limiting life time.
Therefore, we can confirm that the figure D represents a triglyceride.
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Cameron is a 6 year old male who has come to the clinic accompanied by his mother. Cameron has been referred for a neurology consultation by his pediatrician because within the past month, he has had three “episodes.” According to his mother, during these episodes, Cameron has fallen to the ground, lost consciousness, lost control of his bladder and his body began “twitching and shaking all over.” The episodes lasted “a few minutes” and afterwards, Cameron was rather disoriented, weak, and sleepy. Mother denies any known head injuries.
Answers
Cameron's symptoms and description of the episodes suggest that he may be experiencing seizures. Seizures are abnormal electrical activities in the brain that can manifest in various ways.
In Cameron's case, the episodes involve loss of consciousness, loss of bladder control, generalized body twitching, and shaking.
The fact that Cameron falls to the ground, loses consciousness, and experiences postictal symptoms like disorientation, weakness, and sleepiness after the episodes are typical characteristics of a generalized seizure.
The loss of bladder control during the episode is also consistent with this type of seizure.
To further evaluate Cameron's condition, a neurology consultation is appropriate. The neurologist will conduct a thorough examination and may recommend additional tests such as an electroencephalogram (EEG) to measure brain activity and potentially identify abnormal electrical patterns.
It is important to rule out any underlying conditions or triggers that may be contributing to Cameron's seizures. The absence of known head injuries mentioned by the mother suggests that there could be other causes for the seizures, such as epilepsy or a neurological disorder.
Based on the provided information, a neurology consultation will help determine the nature of Cameron's episodes and guide appropriate treatment or management options.
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At any given time, a 4-acre field contains an average of 200 kg dry weight of mallow plants. For these calculations, assume that the food chain shown below is isolated and that there are no other predators or sources of food involved. mallow plant- painted lady butterfly - phoebe- fox Assume that the dry weight of each animal is on average as indicated below Painted lady butterfly 0.1g Phoebe 48 Fox 1 kg (1000 g) a. Assuming that 10% of the biomass, as measured in dry weight, is transferred from one trophic level to the next higher level, calculate how many foxes the field could support at any given time. Show your work and include in your calculations how many phoebes and painted lady butterflies the field could support b. Construct a biomass pyramid diagram depicting the food chain described above. Include only the organisms of the food chain that the 4-acre field will support, and label the trophic level occupied by each organism. The units in your pyramid should be grams per square meter (g/m?) (Note: 1 acre = 4046.86 m).
Answers
a. The 4-acre field will support a total of 200 g foxes at any given time.
b. The pyramid is attached.
How to calculate support for food chain?a. To calculate the number of foxes that the field could support at any given time, we need to work our way up the food chain, starting with the mallow plants:
200 kg of mallow plants x 10% = 20 kg available to painted lady butterflies
20 kg of painted lady butterflies x 10% = 2 kg available to phoebes
2 kg of phoebes x 10% = 0.2 kg available to foxes
Now to convert kg to g to make the calculations easier:
200 kg = 200,000 g of mallow plants
0.1 g per painted lady butterfly x 20 kg of painted lady butterflies = 2000 g = 2 kg
48 g per phoebe x 2 kg of phoebes = 96,000 g = 96 kg
1000 g per fox x 0.2 kg of foxes = 200 g
Therefore, the 4-acre field could support approximately 200 g of foxes at any given time.
b. The biomass pyramid diagram is attached below.
To convert from kg per acre to g per square meter, multiply by a factor of 24.711 (since there are approximately 4046.86 square meters in an acre).
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which of the following sources of pollution would be the most difficult to track and regulate
Answers
Answer:
D
Explanation:Nonpoint source pollution is difficult to regulate, because its source is difficult to track. Fertilizer in ponds or streams would most likely be considered point source pollution.
HELLPPPP!!!!!! PLEASE 100 POINTS!
Cell Division Virtual Lab Activity
Instructions: The Virtual Cell Division Lab is on the lesson assessment page. On the image, it says “Click Anywhere to Start.” Follow the instructions as you move through the lab. The lab activity will keep count of your data on the right, and you can record this into the data table.
Title:
Objective(s):
Hypothesis:
Variables:
Data:
Record the number of cells you observed in the lab activity.
Stages
Number of Cells
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Observations:
Record any observations about the cells you observed. What does the cell look like for each stage? What is a distinguishing visible feature of each stage of the cell cycle?
Stages
Description of Cell
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Data Analysis:
Part 1: Calculate the percentage of the cell cycle spent in each stage. Number of cells in given stage ÷ total number of cells counted × 100 = % of the cell cycle spent in this stage
Part 2: Using your percentages in part 1, create a graph that represents the time spent in each stage of the cell cycle.
Insert chart [Hint: Don’t forget to consider the relationship between your data and the type of chart to best represent your data.]
Conclusion:
Include the following as a summary paragraph in the conclusion of your lab report:
Analysis of the results of the experiment
Based on your data, what can you infer about the length of time spent in each stage of the cell cycle?
What stages were the longest and shortest? Give a brief explanation of why these stages may have that time period.
Rationale for the support or rejection of the hypothesis
Questions:
Using what you have learned in the lesson and the virtual lab activity, answer the following questions in complete sentences.
What differences can you see when you compare the nucleus of a dividing cell with that of a non-dividing cell?
If your observation had not been restricted to the tip of the onion root, how would the results be different?
Answers
Answer:
Explanation:
Title: Cell Division Virtual Lab Activity
Objective(s):
To observe and record the stages of the cell cycle in onion root tip cells.
To calculate the percentage of time spent in each stage of the cell cycle.
To create a graph representing the time spent in each stage of the cell cycle.
Hypothesis: The time spent in each stage of the cell cycle will be approximately equal.
Variables:
Independent variable: stages of the cell cycle
Dependent variable: percentage of time spent in each stage
Data:
Record the number of cells you observed in the lab activity.
Stages Number of Cells
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Observations:
Stages Description of Cell
Interphase Around the nucleus, a membrane is visible. The chromatin is diffuse and spread out.
Prophase Chromosomes are visible and condensing. The nuclear envelope is breaking down.
Metaphase Chromosomes are aligned in the middle of the cell.
Anaphase Chromosomes are pulled apart and moving towards opposite poles.
Telophase Nuclear envelope is reforming around chromosomes. Chromosomes begin to uncoil.
Cytokinesis Cytoplasm begins to divide into two daughter cells.
Data Analysis:
Part 1: Calculate the percentage of the cell cycle spent in each stage. Number of cells in given stage ÷ total number of cells counted × 100 = % of the cell cycle spent in this stage
Stages % of the Cell Cycle
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Part 2: Using your percentages in part 1, create a graph that represents the time spent in each stage of the cell cycle.
[Insert chart]
Conclusion:
Based on the data collected, it can be inferred that the time spent in each stage of the cell cycle is not approximately equal. The longest stage is Interphase, while the shortest stage is Cytokinesis. This may be due to the fact that Interphase is a stage of cell growth and DNA replication, while Cytokinesis is simply the division of the cytoplasm. Therefore, more time is needed for the growth and replication processes. The hypothesis that the time spent in each stage of the cell cycle will be approximately equal is rejected.
Questions:
The nucleus of a dividing cell appears to be more condensed and visible, while the nucleus of a non-dividing cell appears more diffuse and spread out.
If the observation had not been restricted to the tip of the onion root, the results may have been different as the cell cycle may be different in different parts of the plant.
Plants can reproduce both sexually and asexually. What are some examples of sexual reproduction in plants? Select ALL that apply. Responses
Answers
Sexual reproduction in plants involves the fusion of male and female gametes to produce offspring with genetic diversity.
Mechanisms that facilitate sexual reproduction in plants are examples:
1)Pollination and Fertilization: Many plants rely on pollinators, such as bees, butterflies, or birds, to transfer pollen from the male reproductive structures (anthers) to the female reproductive structures (stigma) of flowers.
This process enables the fusion of sperm cells within the pollen with egg cells in the ovules, leading to fertilization.
Examples include flowering plants like roses, sunflowers, and apple trees.
2)Seed Production: After fertilization, the ovule develops into a seed. Seeds contain an embryo, formed by the fertilized egg, enclosed within a protective seed coat.
The mature seeds can disperse and germinate to give rise to new plants.
Various plant groups, including angiosperms (flowering plants) and gymnosperms (conifers and cycads), reproduce sexually through seed production.
3)Alternation of Generations: In plants with a complex life cycle, such as ferns, mosses, and liverworts, sexual reproduction involves an alternation between two distinct generations: the gametophyte and the sporophyte.
The gametophyte generation produces gametes (sperm and eggs) through specialized structures, while the fusion of gametes gives rise to the sporophyte generation, which produces spores.
4)Self-fertilization: Some plants have the ability to self-fertilize, where the pollen from the anther of a flower is transferred to the stigma of the same flower or another flower on the same plant.
This allows for sexual reproduction without the need for external pollinators. Self-fertilization can be seen in plants like tomatoes, peas, and certain grass species.
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Velocity is...
The change of an objects mass
The change of an object's position
The change of an object's position over a period of time
The change of an object's speed
Answers
Answer: is C or D I think
the speed of something in a given direction.
"the velocities of the emitted particles"
Explanation:
Hope this helps!
These cells are typically found throughout the body tissues and are called [ gametes / somatic ] cells.
Answers
Answer:
somatic cells
Explanation:
Somatic cells are all the body's cells with exception of gametic 'germline' cells (i.e., sperm and egg cells). In humans, somatic cells commonly have two complete sets of homologous chromosomes (i.e., they are diploids, 2N = 46 chromosomes), while germline cells have only one set of chromosomes (haploids, N = 23 chromosomes). Somatic cells include, for example, the cells of the bones, skin cells, blood cells, etc. Mutations affecting somatic cells are not inherited (i.e., somatic mutations cannot be transmitted to the next generation), while mutations affecting germ cells can be inherited.
Answer:
somatic
Explanation:
Hope this helps
Nerve cells look very different from red blood cells. Nerve cells transmit nerve impulses through the body. Red bloood cell carry oxygen in the blood. Why are the cell types different?
A.the cell types are the results of different proteins that are determined through gene expression
B. The cell types are determined based on the number of division they go through
C. The cell types are differentiated when they arrived at their location in the body
D. The cell types are the result of different replication errors which are passed onto daughter cells
Answers
HELP ME ASAP
read the article above and answer the questions below :
4. The most digestion takes place in the
A. Stomach
B. Duodenum
C. Rectum
D. None of the above
5. The food you eat becomes fuel for your
A. Brain
B. Muscles
C. Both a. and b. above
D. None of the above
6. The proteins, carbohydrates, and fats from the food that was eaten travels to cells throughout the body in the
A. Stomach
B. Duodenum
C. Small intestine
D. Blood
Answers
5. C
6.C
Hope this helps :)
Which of the following describes structures and functions of
the human body?
SELECT ALL THAT APPLY
a can relay messages faster than 400 km/hr
b can repair itself, if necessary
C a pump that moves about a million barrels of fluid
over its lifetime
d a control center that contains billions of individual
components
Answers
Answer:
A. Neurons
B. Liver
C. Heart
D. Brain
Which organism is likely to carry out the process shown in the diagram?
CO, + H,O
Heat
www
Chloroplast
Mitochondrion
MASS
Respiration
OA. Barn owl
OB. Mushroom
C. Alligator
-0₂
Sugar
ATP
Answers
The organism that is most likely to carry out the process shown in the diagram is Calla lily (option D).
What is cellular respiration?Cellular respiration is the process by which cells obtain chemical energy by the consumption of oxygen and the release of carbon dioxide.
According to this question, a diagrammatic representation of cellular respiration is given in the above chart. Based on the chart, chloroplast is included to release oxygen gas needed for respiration.
Only green plants possess chloroplast used for photosynthesis, hence, Cana lily is the most likely organism to carry out the above process.
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Which of the following is used to represent a dominant trait in a Punnett square?
A- An uppercase letter
B- A lowercase letter
C- A shaded square
D- A shaded circle
(if u answer pls have a explanation thanks :))
Answers
When jaw become large enough to hold the permanent teeth . The milk teeth fall and permanent teeth appear
Answers
The "exfoliation" or "shedding" of milk teeth is the name of the procedure.
What is the Dentition of Humans?The primary and permanent tooth sets make up the human dentition. Maxillary (upper) and Mandibular (lower) are the two opposing arches in which teeth are arranged. These can be split into their left and right halves along the midline (mid-sagittal plane).
Four Different Teeth Types and Their Purposes
The majority of individuals have 32 permanent adult teeth, which can be classified into four groups:
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The type of eating disorder characterized by episodes of bingeing and purging is
anorexia nervosa.
ОА.
ОВ. .
bulimia nervosa.
oc. compulsive eating disorder.
D. binge-eating disorder
Answers
Answer:
The answer is Bulimia Nervosa
The type of eating disorder characterized by episodes of bingeing and purging is bulimia nervosa.
What is eating disorder?Eating disorder means overeating of food which changes the lifestyle.
What is characterized?Characterized means describing the nature.
What is episodes?Episodes means events which occur in parts or in a sequence.
What is bingeing?Bingeing is the controlled eating.
What is purging?Purging is the method of vomiting.
What is bulimia nervosa?Bulimia nervosa is an eating disorder.
Hence the correct option is (B).
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Which statement would be MOST important to include in a summary of the article?
A
Models are used to represent objects and events in the real world.
B
Maps can be created on paper as well as digitally in people's phones.
C
Scales on maps use measurements in miles or kilometers.
D
Microscopes use lenses that bend light to make objects appear larger.
Answers
Answer:
D.) Microscopes use lenses that bend light to make objects appear larger.
Explanation:
I believe this is correct because it gives more detail in its sentence providing more information on a subject.
A drug that blocks the action of carbonic anhydrase in parietal cells would result in
Answers
A drug that blocks the action of carbonic anhydrase in parietal cells would result in high pH during gastric digestion.
What is parietal cell?
"Acid-secreting cell of the stomach wall."What is carbonic anhydrase?Carbonic anhydrase is an enzyme that catalyzes interconversion of carbon dioxide (CO2) and carbonic acid (H2CO3)The drug that block this enzyme will inhibit the reaction of conversion of CO2 and water to carbonic acid which results in the low acid secretion in stomach.What is high pH?"A high pH would make heavy metals less available, and, therefore, less toxic."Hence, the drug blocking carbonic anhydrase will result in higher pH during digestion.
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Air pressure and air temperature ______ with altitude. a Stay the same
b increase
c decrease
d none of the above
Answers
i just started this survey i got to number 5 and i have no idea how to do it.
Answers
Hope U had a nice day Nd stay warm
Construct the electron dot diagram for chlorine. You have completed this exercise. Step 1: Use the periodic table to find the chemical symbol for chlorine. The symbol for chlorine is: Civ Step 2: How many valence electrons does chlorine have? Step 3: Add dots one by one around the chemical symbol to represent valence electrons. Start at the top and move clockwise around the symbol. •CT: Nice work! You have created the electron dot formula for chlorine. Intro ) Final
Answers
Answer:
1. Cl
2. 7 valence electrons
3. u did it right
Good job
The chemical symbol for chlorine is Cl. There are seven valence electrons present in chlorine.
What are valence electrons?
Valence electrons are electrons in an atom's outermost shell, or energy level. For example, oxygen contains six valence electrons, two of which are in the 2s subshell and four of which are in the 2p subshell.
The chemical symbol of the element (as found on the periodic table) is written in the Lewis symbol for an atom, and the valence electrons are depicted as dots encircling it.
The number of electrons in an atom's outermost shell is referred to as its valence electrons. The final shell of the chlorine atom now has 7 electrons. As a result, a chlorine atom contains 7 valence electrons.
Therefore, Cl is the chemical symbol for chlorine. In chlorine, there are seven valence electrons.
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select all the body and cellular processes that require cell division (mitosis or meiosis) to function- growth and development- reproduction- replace dead cells
Answers
Both meiosis or mitosis result in cell division to produce new cells. So, for sexually reproducing creatures to continue to exist, these two processes are necessary. The non-sex cells reproduce during mitosis.
Are mitosis and meiosis crucial for development and repair?The form of cell division essential for body growth and repair is called mitosis. Cell division known as meiosis is what creates gametes, or sex cells, for the body. All somatic cells, or cells other than gametes, undergo mitosis throughout the body.
What is the name of the cell division process known as mitosis?Chromosome alignment and segregation are processes that go through distinct phases. After mitosis, a process known as cytokinesis divides the entire cell in half (Figure 1). Walther Flemming's illustration of chromosomes in mitosis, made around 1880, is shown in Figure 1.
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What weakens hurricanes when they reach the Atlantic Ocean
Answers
These storms diminish and disintegrate once they cross over land or across cold water, losing contact with the hot water that gives them strength.
What are hurricanes?A spiral arrangement of thunderstorms that produce torrential rain and squalls, a low-pressure center, and powerful winds are the characteristics of a tropical cyclone, a fast revolving storm system.
A tropical storm that has sustained winds of 74 mph or greater is referred regarded as a hurricane.
A storm's eye typically measures 20 to 30 miles in width and can reach distances of 400 miles.
Storms can be dangerous because of their torrential downpours, strong gusts, and storm surges.
Because they are no longer being fueled by the energy from the warm ocean waters, hurricanes typically lose strength when they make landfall.
Thus, these are the factors that weakens hurricanes when they reach the Atlantic Ocean.
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We have recently been learning about Artificial Selection. Write a paragraph describing how artificial selection relates to fruits and vegtebles.
Answers
Answer:
Sorry only paragraph I'm on phone.
Explanation:
Fruits and vegetables have changed a lot since the onset of agriculture 10,000 years ago, as generation after generation of farmers artificially bred crops to select for more desirable traits like size and taste.
Example of the nucleus acid include
Answers
Answer:
Explanation:
Two examples of nucleic acids include deoxyribonucleic acid (better known as DNA) and ribonucleic acid (better known as RNA). These molecules are composed of long strands of nucleotides held together by covalent bonds