A DNA molecule consists of two antiparallel strands of polynucleotides. Each strand is composed of nucleotides bound to each other along the sugar-phosphate backbone 5 end 3 end OH Sugar CH2 CH 3'end 5' end Drag "True" or "False" to the end of each statement.
Answers
True. Two antiparallel chains of polynucleotides make up a DNA molecule. Nucleotides are linked to one another all along sugar-phosphate backbone to form each strand. OH Sugar CH2 CH 3'end 5' end 5 end 3 end.
When two biopolymers run parallel to one another but in the opposite direction, they are said to be antiparallel in biochemistry. The complementary threads of a double helix of DNA which run in opposition to one another and are one example. A Dna has two antiparallel strands. The high degree of stability attained in an antiparallel arrangement is the primary cause of DNA strand antiparallelity. DNA is also capable of existing in a parallel configuration, but the base pairing (reverse Watson & Crick base pairing) will be different and the stability will be lower. if their alignments are different and they are parallel to one another. The two complimentary threads of a Dna helix, that run in opposition to one another, serve as an illustration.
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Related Questions
A particular gene has two alleles, a dominant allele A and a recessive allele a. The frequency of allele A is 0.55. If the population is in Hardy-Weinberg equilibrium with respect to the gene, then what is the expected frequency of genotype Aa
Answers
If p = frequency of A and q = frequency of a, then assuming H-W equilibrium we have
p + q = 1 ⇒ q = 1 - p = 1 - 0.55 = 0.45
Then the expected frequency of the heterozygous genotype Aa is 2pq = 2 • 0.55 • 0.45 = 0.495.
The ribosomes found in bacteria are significantly different from those in eukaryotes. what is the svedberg value for uniquely eukaryotic ribosomes?
Answers
The Svedberg value refers to the sedimentation rate of particles during centrifugation. It helps determine the size and shape of the particles. In eukaryotes, ribosomes have a Svedberg value of 80S, which means they sediment at a rate of 80 Svedberg units.
The ribosomes found in bacteria are smaller and have a different structure compared to those in eukaryotes. Bacterial ribosomes have a Svedberg value of 70S, meaning they sediment at a rate of 70 Svedberg units.
The Svedberg value of ribosomes is based on their composition and size. Eukaryotic ribosomes are composed of two subunits, the large 60S subunit and the small 40S subunit, which combine to form an 80S ribosome. Bacterial ribosomes, on the other hand, consist of a larger 50S subunit and a smaller 30S subunit, forming a 70S ribosome.
Therefore, the Svedberg value for uniquely eukaryotic ribosomes is 80S, while bacterial ribosomes have a Svedberg value of 70S. This difference in size and composition reflects the distinct nature of ribosomes in bacteria compared to eukaryotes.
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What is the primarily determines the speed of muscle fiber contraction?
a. amount of actin and myosin
b. amount of actin atpase
c. diameter of the muscle fiber
d. speed of myosin atpase
Answers
The speed of muscle fiber contraction is primarily determine by the speed of myosin ATPase; option D.
What determines the speed of muscle fiber contraction?Muscle fiber contraction occurs when a single muscle fiber or group of fibers on receiving a signal from the the brain through the nerves begins to contract and increase the tension within the muscle.
The components of a muscle fiber contraction include:
actin filamentsmyosinmyosin ATPase - an enzyme that determines the speed of contractionIn conclusion, effective muscle fiber contraction involves the coordinated activity of all the muscle contraction components.
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In Drosophila melanogaster, vestigial wings are caused by a recessive allele of a gene that is linked to a gene with a recessive allele that causes black body color. Morgan crossed Mack-bodied, normal-winged females and gray-bodied, vestigial-winged males. The F_1 were all gray bodied, normal winged. The F_1 females were crossed to homozygous recessive males to produce testcross progeny. Morgan calculated the map distance to be 17 map units. Which of the following is correct about the testcross progeny? A) black-bodied, normal-winged flies = 17% of the total B) black-bodied, normal-winged flies PLUS gray-bodied vestigial-winged flies = 17% of the total C) gray-bodied, normal-winged flies PLUS black-boded, vestigial-winged flies = 17% of the total D) black-bodied, vestigial-winged files = 17% of the total A couple has a child with Down syndrome. The mother is 39 years old at the time of delivery. Which of the following is the most probable cause of the child's condition? A) The woman inherited this tendency from her parents B) The mother had a chromosomal duplication. C) One member of the couple underwent nondisjunction in somatic cell production. D) The mother most likely underwent nondisjunction during gamete production. Imagine that you've isolated a yeast mutant that contains histones resistant to acetylation. What phenotype do you predict for this mutant? A) The mutant will grow rapidly. B) The mutant will require galactose for growth. C) The mutant will show no gene expression. D) The mutant will show high levels of gene expression. DNA methylation and histone acetylation are examples of ______, A) genetic mutation B) chromosomal rearrangements C) transcriptional regulation D) translocation Cinnabar eyes is a sex-linked, recessive characteristic in fruit flies. if a female having cinnabar eyes is crossed with a wild-type male, what percentage of the F_1 males will have cinnabar eyes? A) 0% B) 25% C) 33% D) 50% E) 100% The reason for differences in the sets of proteins expressed in a nerve and a pancreatic cell of the same individual is that nerve and pancreatic cells contain different _______. A) genes B) regulatory sequences C) coiling pattern in these two genes D) promoters E) operators Start codon in prokaryotes is ________. The tRNA carrying this amino acid is brought to the start site by the protein _____ A) AUG IF3 B) AGG IF2 C) AUG EF3 D) UAG IF3 E) AUG IF2 Two nucleotides are held together by _______ bond and two amino acids are held together by ______ bond A) Nucleic acid and peptide bond. B) Hydrogen and peptide bond C) Phosphodiester and glycosidic bond D) Phosphodiester and peptide bonds E) Glycosidic and ester bonds All unsaturated fatty adds are _______ and _____ in nature A) trans and pi bond B) cis and even C) cis and odd D) trans and even E) cis and od
Answers
Answer:
A
Explanation:
1. B) black-bodied, normal-winged flies PLUS gray-bodied vestigial-winged flies = 17% of the total
2. D) The mother most likely underwent nondisjunction during gamete production.
3. C) The mutant will show no gene expression.
4. C) transcriptional regulation
5. D) 50%
6. B) regulatory sequences
7. E) AUG IF2
8. D) Phosphodiester and peptide bonds
9. B) cis and even
1. The testcross progeny would most likely be option B) black-bodied, normal-winged flies PLUS gray-bodied vestigial-winged flies = 17% of the total.
2. The most probable cause of the child's Down syndrome is option D) the mother most likely underwent nondisjunction during gamete production.
3. The phenotype predicted for the yeast mutant that contains histones resistant to acetylation is option C) the mutant will show no gene expression.
4. DNA methylation and histone acetylation are examples of option C) transcriptional regulation.
5. If a female with cinnabar eyes is crossed with a wild-type male, the percentage of F1 males with cinnabar eyes would be option D) 50%.
6. The reason for differences in the sets of proteins expressed in a nerve and a pancreatic cell is that they contain different option B) regulatory sequences.
7. The start codon in prokaryotes is option A) AUG IF3. The tRNA carrying this amino acid is brought to the start site by the protein IF2.
8. Two nucleotides are held together by a phosphodiester bond, and two amino acids are held together by a peptide bond.
9. All unsaturated fatty acids are option B) cis and even in nature.
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what are vestigial organs
Answers
These are 'useless' body-parts, otherwise known as vestigial organs, are remnants of lost functions that our ancestors possessed
Answer:
Vestigiality is the retention during the process of evolution of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species. Assessment of the vestigiality must generally rely on comparison with homologous features in related species.
Which of the following is an abiotic factor or an ecosystem? select one: a. minerals in the soil b. microorganisms in the soil c. vertebrates in a stream d. all of the above
Answers
Abiotic factors are essential for the functioning and survival of organisms within the ecosystem. The abiotic factor in an ecosystem among the given options is (a) minerals in the soil.
Abiotic factors are non-living components of an ecosystem that influence the organisms living within it. They include physical and chemical factors such as temperature, sunlight, water availability, soil composition, and minerals. In this case, minerals in the soil are abiotic factors because they are non-living components that directly impact the ecosystem.
Microorganisms in the soil and vertebrates in a stream, on the other hand, are biotic factors. Biotic factors refer to the living organisms within an ecosystem, including plants, animals, fungi, and microorganisms. Microorganisms in the soil contribute to nutrient cycling and decomposition processes, while vertebrates in a stream are living organisms that interact with other biotic components of the ecosystem.
Therefore, the correct answer is a. minerals in the soil, as it represents an abiotic factor within an ecosystem.
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Summarize how soil is important to life
Answers
hey ! what is the difference between a habitat and a niche?
ill give brainliest if i can, but id k im high enough level yet lol
Answers
Answer:A habitat is the place where an organism lives while a niche is that organism's role within that environment.
Explanation:
Answer:
Down Below:
Explanation:
Habitat = the natural home or environment of an animal, plant, or other organism.
Niche = a comfortable or suitable position in life or employment.
Select the correct answer from each drop-down menu.
The Punnett square illustrates a cross for color of the flower.
Based on the phenotypes and genotypes of these offspring, it is clear that purple flower color allele is and the parents are.
Answers
Based on the phenotypes and genotypes of the offspring, it is clear that the purple flower color allele is dominant over the white flower color allele.
The Punnett square is a diagram used to predict the outcome of a cross between two individuals. In this particular case, the Punnett square illustrates a cross for the color of the flower. The genotypes of the parents are represented by the letters P and p, where P represents the dominant allele for purple flower color and p represents the recessive allele for white flower color.
The Punnett square predicts that the offspring will have either a genotype of PP, Pp or pp, with PP representing homozygous dominant for purple flower color, Pp representing heterozygous for purple flower color and pp representing homozygous recessive for white flower color. The phenotypes of the offspring are represented by the physical appearance of the flower.
This is because some of the offspring have purple flowers despite having one copy of the recessive allele (Pp genotype). The parents are therefore likely to be heterozygous (Pp) for flower color, as this would allow for the expression of both purple and white flower colors in the offspring.
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Consider the surface with parametric equationsr(s,t)=⟨st,s+t,s−t⟩.A) Find the equation of the tangent plane at (2,3,1).B) Find the surface area under the restriction s2+t2≤1.
Answers
A) The equation of the tangent plane at (2,3,1) is x-2y+3z=1. B) The surface area under the restriction \(s^2+t^2≤1\) can be calculated using the surface integral of the vector field r(s,t) with respect to the area element dA.
A) To find the equation of the tangent plane at (2,3,1), we first find the partial derivatives of r(s,t) with respect to s and t. These are ∂r/∂s = ⟨t,1,1⟩ and ∂r/∂t = ⟨s,1,-1⟩, respectively. Evaluating these at (2,3,1), we get ∂r/∂s = ⟨3,1,1⟩ and ∂r/∂t = ⟨2,1,-1⟩. The normal vector to the tangent plane is the cross product of these two vectors, which is ⟨2,-5,-1⟩. Thus, the equation of the tangent plane is 2(x-2) - 5(y-3) - (z-1) = 0, which simplifies to x-2y+3z=1.
B) To find the surface area under the restriction \(s^2+t^2≤1\), we first parameterize the surface as r(s,t)=⟨st,s+t,s−t⟩ with 0≤s,t≤1. Then, we compute the surface integral of the vector field r(s,t) with respect to the area element dA. This gives us the surface area of the portion of the surface that satisfies the given restriction. Using the formula for the surface integral, the surface area can be calculated as the double integral of the magnitude of the cross product of the partial derivatives of r(s,t) with respect to s and t, integrated over the region \(s^2+t^2≤1\).
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what is the most common way that a bacterium can acquire a plasmid with genes for antibiotic resistance from another bacterium?
Answers
Answer: During sexual reproduction or Viruses can pick DNA (including plasmids) from one bacterium
Explanation:
The the most common way that a bacterium can acquire a plasmid with genes for antibiotic resistance from another bacterium is horizontal gene transfer.
What is antibiotic resistance?Antibiotic resistance is a form of acquired resistance to antibiotics displayed by bacteria cells.
Antibiotic resistance is commonly acquired by the transfer of resistance plasmids from one bacteria to another by the process of horizontal gene transfer.
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Among the different forms of electromagnetic radiation emitted by the sun, which form is absorbed by plants for photosynthesis?.
Answers
Answer:
visible light is the em radiation absorbed by plants for the photosynthesis process.
The form of electromagnetic radiation that is absorbed by plants for photosynthesis is known as visible light. This is also known as photosynthetically active radiation (PAR).
What is Photosynthesis?Photosynthesis may be defined as a type of process through which green plants and some photosynthetic algae synthesize their own food in the form of glucose with the help of carbon dioxide and water in the presence of sunlight.
Visible light lies in the visible spectrum of wavelength from 400 to 700 nm. This visible spectrum is a system where we study the properties of light. This spectrum defines the relationship between energy and wavelength.
Therefore, the visible light or visible spectrum is the form of electromagnetic radiation that is absorbed by plants for photosynthesis.
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where plasma is found naturally
Answers
Answer:
its naturally found in lightning and the northern and southern lights
Explanation:
a group of similar cells that perform a specific function
Answers
Brainliest whoever gets the answer
Answers
Answer:
You answer would be C.TCAGGTAC
Explanation: adenine (A), cytosine (C), guanine (G), and thymine (T)
A matches up with t
G matches up with C
Hope this helps!! Mark me brainliest. :))
body images of women please
Answers
Answer:
Body images of women
Explanation:
Body images of women
When testing for tonicity of red blood cells, why were you unable to read the lab manual through the tubes containing hypertonic or isotonic solution
Answers
You were unable to read the lab manual through the tubes containing hypertonic or isotonic solution because the cells in those solutions remained intact, causing the solutions to be opaque.
In an isotonic solution, a red blood cell will not experience any net water movement. There won't be a net migration of water towards the solution or the cell since the concentration of the solute and water are identical both within and outside the cell.An animal or plant cell submerged in a hypertonic solution shrinks as a result of water loss ( water moves from a higher concentration inside the cell to a lower concentration outside ). hence the cells remain intact causing the solution to be opaque.learn more about hypertonic or isotonic here: https://brainly.com/question/19358677
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Carbohydrates are the main source for the body to _______
A
Gain Energy
B
Build muscle
C
insulate itself
D
Protect itself
Answers
Answer:
gain energy
Explanation:
2. Using the results of his experiments with pea plant
crosses, what did Gregor Mendel discover?
A) the principles of dominance, segregation, and
independent assortment
B) that pea plants develop mutations after expos
to radiation
C) intermediate inheritance and gene linkage
D) that DNA is involved in the inheritance of
dominant traits
ubati
Answers
Using the results of his experiments with pea plant crosses, Gregor Mendel discovered: A) the principles of dominance, segregation, and independent assortment.
What was the pea plant crosses experiment?In this famous experiment, Mendel cross- pollinated pea plants based on their different features to make important discoveries on how traits are inherited between the generations.
Mendel crossed the pure lines of pea plants. Dominant traits, like purple flower color, appeared in first-generation hybrids (F1), whereas recessive traits, like white flower color were masked. But recessive traits reappeared in second-generation (F2) pea plants in ratio of 3:1 (dominant to recessive).
The experiment allowed Mendel to conclude on two laws of Inheritance; that are Law of Segregation and Law of Independent Assortment.
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What do you think happens in the atmosphere to cause rain, snow, and other types of precipitation?
Answers
Answer:
water is evaporated into the air then the water molecules get too heavy and come back down as snow/rain/ect
Answer:
When warm, wet air rises, it cools, and water vapor condenses out to form clouds. ... When ice crystals form high up in the cloud, and it's below the freezing point of water all the way down, then you get snow. But when there are alternating layers of air above and below freezing, you get other types of precipitation.
Explanation:
Your eldest sister instructed you to pack her clothes because she is going to an urgent
out of country seminar and she is running out of time in doing this. What are you going
to do?
Answers
I will follow my eldest sister's instruction and pack her clothes as quickly and efficiently as possible.
I will start by gathering all of the necessary clothing items that she will need for the seminar, including any formal or business attire, as well as any casual clothes for downtime. I will also make sure to pack any necessary toiletries and accessories. I will then fold the clothes neatly and pack them into her suitcase, making sure to maximize the space and avoid any wrinkles or damage to the clothes. Once everything is packed, I will double check to make sure that I have not forgotten anything and that everything is secure before closing the suitcase and giving it to my sister.
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A plane travels 395 kilometers in 5 minutes. What was its speed?
Answers
Explanation:
Hey there!
Here, given is;
Distance (d) = 395km.
Time (t) = 5 mins.
Now, Using formula,
\(s = \frac{d}{t} \)
Put all values.
\(s = \frac{395}{5} \)
Therefore the speed of plane is 79km/min.
Hope it helps..
Cleft chin is an x-linked dominant trait. assume that a man with a cleft chin marries a woman with a round chin. what percent of their female progeny will show the cleft chin trait? 75 percent 50 percent 100 percent 0 percent 25 percent
Answers
If cleft chin is an X-linked dominant trait, it means that the gene responsible for this trait is located on the X chromosome.
Since females have two X chromosomes and males have one X and one Y chromosome, the inheritance of this trait can differ between the sexes.
In this scenario, we know that the man has a cleft chin, so he must have at least one copy of the cleft chin gene on his X chromosome. The woman, on the other hand, has a round chin, which means she does not have any copies of the cleft chin gene on either of her X chromosomes.
The possible genotypes of the parents are:
Man: XcY (cleft chin gene on X chromosome)
Woman: XRXr (no cleft chin gene on X chromosomes)
where Xc is the X chromosome with the cleft chin gene, Xr is the X chromosome without the cleft chin gene, and XRXr is the genotype for a round chin.
The possible genotypes of their offspring are:
Male: XcY or XrY (50% chance of inheriting either X chromosome from the father)
Female: XcXr (50% chance of inheriting the Xc chromosome from the father, and 50% chance of inheriting the Xr chromosome from the mother)
Therefore, only the female offspring can show the cleft chin trait. The probability of a female offspring inheriting the Xc chromosome from the father is 50%, and the probability of inheriting the Xr chromosome from the mother is also 50%. So the probability of a female offspring having a cleft chin is 50%.
Therefore, the answer is: 50 percent.
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Environmental Impact Assessment #1
5
Considering the country's resources and its goals (for example, to minimize CO2 production), which of the following would be the most
environmentally sound energy choice for them as they build new power plants for more electricity generation?
O Anthracite coal, because they already know how to operate a plant that runs on it and they can buy coal from their neighbors.
O Hydroelectric, because it produces no CO2 and they have many rivers of their own that they could dam.
Wood, because
they have lots of forests which are potentially renewable and people could make money by cutting wood and selling it to the
power company.
Natural gas, because it produces less CO2 than any other fuel and they could purchase it from neighboring countries,
Answers
The country's resources and goals depend on the nature of electricity generation, CO2 emission, solar production, development of dams, etc.
What do you mean by Resources?Resources may be defined as useful or valuable possession or the quality of a country that are consumed as stocks.
Considering the country's resources and its goals, the most environmentally sound energy choice for them as they build new power plants for more electricity generation is that it produces no CO2 and they have many rivers of their own that they could dam.
Therefore, it is well described above.
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Describe how fur color in the collared lemming population will likely change over time as temperatures increase because of climate change. Explain your answer using the principles of natural selection.
Answers
As temperatures increase due to climate change, it is likely that the fur color of collared lemmings will change over time through the process of natural selection.
The principle of natural selection states that organisms with advantageous traits are more likely to survive and reproduce, passing on those traits to future generations.
In the case of collared lemmings, those individuals with lighter-colored fur may be at an advantage in warmer temperatures. Light-colored fur reflects sunlight and heat, which can help to regulate body temperature in hotter environments. Therefore, over time, lemmings with lighter-colored fur may be more likely to survive and reproduce, passing on their genes for lighter fur to their offspring.
Conversely, individuals with darker-colored fur may be at a disadvantage in warmer temperatures as their fur absorbs more sunlight and heat. These individuals may be less likely to survive and reproduce, resulting in fewer offspring with genes for darker fur.
Through this process of natural selection, it is likely that the collared lemming population will evolve over time to have a higher frequency of individuals with lighter-colored fur. This adaptation will help the species to better survive and thrive in a warming climate.
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which hormone can be measured to detect early pregnancy in a primate? a. Chorionic gonadotropin
b. Progesterone
c. Estrogen
d. Follicle-stimulating hormone
Answers
The correct answer is (a) Chorionic gonadotropin.
Chorionic gonadotropin (CG) is a hormone that is produced by the placenta during pregnancy. It is used to detect early pregnancy in primates, as it is present in the urine of pregnant females. CG is also used to treat infertility, as it can help to stimulate ovulation.Progesterone is a hormone that is produced by the ovaries and the placenta during pregnancy. It helps to prepare the uterus for pregnancy and to maintain the pregnancy. Progesterone levels can be measured in the blood or urine, but they are not used to detect early pregnancy in primates.Estrogen is a hormone that is produced by the ovaries and the adrenal glands. It helps to regulate the menstrual cycle and to prepare the body for pregnancy. Estrogen levels can be measured in the blood or urine, but they are not used to detect early pregnancy in primates.Follicle-stimulating hormone (FSH) is a hormone that is produced by the pituitary gland. It helps to stimulate the ovaries to produce eggs. FSH levels can be measured in the blood or urine, but they are not used to detect early pregnancy in primates.To learn more about hormone click here:
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which structure is the site of the synthesis of proteins destined for export from the cell? * 5 points a) smooth er b) lysosomes c) rough er d) golgi vesicles e) free cytoplasmic ribosomes
Answers
The structure that is the site of the synthesis of proteins destined for export from the cell is c) rough ER.
Rough ER can be described as a structure in the cell that has ribosomes attached to it.
The rough ER is the site where proteins are made and sent to the Golgi complex for post-translational modifications.
The process of translation, that results in the formation of proteins occurs in the ribosomes that are attached to the rough endoplasmic reticulum.
The proteins that are produced in the rough endoplasmic reticulum will either help the same cell to perform other functions or will be transported outside of a cell where they will perform different functions.
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What is the atomic mass of Sulfur that has 18 neutrons?
Answers
Answer: 32.066 atomic mass units
B is the correct option.
What are cycles and conservation
Answers
Answer:As energy moves through an ecosystem, it changes form, but no new energy is created. Similarly, as matter cycles within an ecosystem, atoms are rearranged into various molecules, but no new matter is created. So, during all ecosystem processes, energy and matter are conserved.
Explanation:
What does genetics mean in your own words?
Answers
Answer:
Genetics-The inherited characteristics you get from your family's lifeline of DNA.
Explanation: