AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the primary difference between the typical structure of RNA and DNA?
A
DNA is double-stranded and contains uracil, while RNA is single-stranded and contains thymine.
B
DNA is double-stranded and contains thymine, while RNA is single-stranded and contains uracil.
C
RNA is double-stranded and contains thymine, while DNA is single-stranded and contains uracil.
D
RNA is double-stranded and contains uracil, while DNA is single-stranded and contains thymine.
Explanation: 

Detailed explanation-1: -One of the primary differences between DNA and RNA is that DNA is double-stranded while RNA is single-stranded.

Detailed explanation-2: -There are two differences that distinguish DNA from RNA: (a) RNA contains the sugar ribose, while DNA contains the slightly different sugar deoxyribose (a type of ribose that lacks one oxygen atom), and (b) RNA has the nucleobase uracil while DNA contains thymine.

Detailed explanation-3: -Like DNA, RNA can form right-handed double helices. In contrast to DNA, RNA forms an A-form helix with a radius of ∼1.2 nm and a length increase per base pair of ∼2.8 Å, ∼20% wider and shorter than B-form dsDNA (Fig.

Detailed explanation-4: -RNA contains uracil, while DNA contains thymine. Explanation: RNA is different than DNA in that it 1) is single stranded (DNA is double stranded), 2) contains uracil (DNA contains thymine instead), and 3) contains a ribose sugar (DNA contains a deoxyribose sugar).

Detailed explanation-5: -So, the three main structural differences between RNA and DNA are as follows: RNA is single-stranded while DNA is double-stranded. RNA contains uracil while DNA contains thymine. RNA has the sugar ribose while DNA has the sugar deoxyribose.

There is 1 question to complete.