Which of the following is true about DNA and RNA? I. DNA is a nucleic acid, whereas RNA is a protein.

II. DNA stores genetic information, whereas RNA is directly involved in protein production.

III. Both DNA and RNA always contain the nitrogenous base thymine.

IV. DNA contains the sugar deoxyribose, whereas RNA contains the sugar ribose.

AI, II and IV only
BII and IV only
CIII only
DI, II, III, and IV

Question

KinzieOll6sky KinzieOll6sky

14-09-2016
Biology

Answered

Which of the following is true about DNA and RNA? I. DNA is a nucleic acid, whereas RNA is a protein.

II. DNA stores genetic information, whereas RNA is directly involved in protein production.

III. Both DNA and RNA always contain the nitrogenous base thymine.

IV. DNA contains the sugar deoxyribose, whereas RNA contains the sugar ribose.

AI, II and IV only
BII and IV only
CIII only
DI, II, III, and IV

Verified Answer :

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JcAlmighty JcAlmighty · Answer 1 · 2016-09-16T10:54:45-04:00

The answer is b. II and IV only.

Let's go through all choices:
I. DNA is a nucleic acid, whereas RNA is a protein. - Both DNA and RNA are nucleic acids.
II. DNA stores genetic information, whereas RNA is directly involved in protein production. - That's right. Genes are sections of DNA that carry genetic information. Based on that sequence, mRNA is synthesised and takes place in protein production.
III. Both DNA and RNA always contain the nitrogenous base thymine. - Only DNA contains thymine, while in RNA uracil is present instead of thymine, All other nitrogenous bases (adenine, guanine, cytosine) are common for both molecules.
IV. DNA contains the sugar deoxyribose, whereas RNA contains the sugar ribose. - That's right. That is why DNA is called deoxyribonucleic acid, and RNA is called ribonucleic acid.