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Ganezh [65]
3 years ago
9

DNA and RNA are similar in some respects and different in others. Which of the following statements is not accurate about their

similarities?
A.Both DNA and RNA nucleotides contain the nitrogen bases adenine, cytosine, and guanine.
B. Both DNA and RNA always double helices.
C.Both DNA and RNA contain monosaccharide sugars on their respective nucleotides.
D.Both DNA and RNA are involved in the "Central Dogma" of biology.
e.Both DNA and RNA contain phosphate groups on their respective nucleotides.
Biology
2 answers:
umka2103 [35]3 years ago
7 0
<span>DNA is usually double stranded and most cellular RNA is single stranded. 1)In DNAthe pentose sugar is deoxyribose.Whereas in RNA the pentose sugar is ribose. 2)In DNA the common organic bases are adenine,guanine,cytosine and thymine.Whereas in RNA the common organic bases are adenine,guanine,cytosine and uracil.</span>Dec 9, 2009
Solnce55 [7]3 years ago
6 0
B.
RNA molecules are usually present as a single helix.
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which of the following statements regarding enzymes is true? (3 points) enzymes increase the rate of a reaction by making the re
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Which is true about enzymes is: enzymes increase the rate of reactions by lowering the activation energy barrier.

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Activation energy is the energy required to break down the reactants. The role of enzymes is to lower the activation energy limit needed to start reactions.

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11 months ago
What do anthropologists call the uneven distribution of resources and privileges, often along lines of gender, racial or ethnic
Serggg [28]

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The correct answer is - startification.

Explanation:

Categorization of the people of the population in the socioeconomic class or uneven distribution of privileges and resources groups on the based of various factors or lines such as racial, gender, religion, family, legal status and others termed by the anthropologists as stratification. The socioeconomic strata is might be of four type, slavery, class, casts and estates depend of the population.

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4 0
3 years ago
A scientist is using a species of green algae to study the electron transport chain in photosynthesis. He uses a laser to inacti
jeka94

Answer:

D) In case 1, both PS I and PS II completely lose function; in case 2, a proton gradient is still produced.

Explanation:

The light dependent reaction of photosynthesis, which produces the ATP and NADPH needed in the light independent stage of the process, includes complexes of proteins and pigments called PHOTOSYSTEMS. These photosystems (I and II) are key to the functionality of the light dependent reactions in the thylakoid.

The major pigment present in both photosystems is CHLOROPHYLL A, which absorbs light energy and transfers electrons to the reaction center. Chlorophyll B is only an accessory pigment meaning it can be done without. Hence, if all of the chlorophyll A is inactivated in the algae but leaves chlorophyll B intact as in case 1, both PS I and PS II will lose their function because Chlorophyll A is the major pigment that absorbs light energy in both photosystems.

In case 2, if PS I is inhibited and PS II is unaffected, a PROTON GRADIENT WILL STILL BE PRODUCED because the splitting of water into protons (H+) and electrons (e-) occurs in PSII. Hence, H+ ions can still be pumped into the inner membrane of the thylakoid in order to build a proton gradient even without the occurrence of PS I.

3 0
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