AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What are the three components of a nucleotide in DNA & RNA?
A
sugar, hydrogen, nitrogen base
B
sugar, oxygen, nitrogen base
C
sugar, phosphate, nitrogen base
D
sugar, phosphate, protein
Explanation: 

Detailed explanation-1: -A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base. The bases used in DNA are adenine (A), cytosine (C), guanine (G) and thymine (T). In RNA, the base uracil (U) takes the place of thymine.

Detailed explanation-2: -The building blocks of DNA are nucleotides, which are made up of three parts: a deoxyribose (5-carbon sugar), a phosphate group, and a nitrogenous base (Figure 9.3).

Detailed explanation-3: -In both DNA and RNA, a nucleotide consists of three parts: Nitrogenous base (base): A nitrogenous base (simply called a “base” in the context of biochemistry) is an organic molecule that contains nitrogen.

Detailed explanation-4: -Structurally, RNA is a linear polymer of four different nucleotides. Each nucleotide is composed of three parts: a five-carbon sugar known as ribose; a phosphate group; and one of four bases attached to each ribose. The four bases are adenine (A), cytosine (C), guanine (G), and uracil (U).

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