AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

STRUCTURE OF NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Nitrogen bases for RNA:
A
Adenine, Guanine, Cytosine, and Uracil
B
Adenine Guanine, Cytosine, and Sulfur
C
Adenine, Guanine, Cytosine, and Thymine
D
Adenine, Guanine, Cytosine, and Phosphate
Explanation: 

Detailed explanation-1: -Four different types of nitrogenous bases are found in DNA: adenine (A), thymine (T), cytosine (C), and guanine (G). In RNA, the thymine is replaced by uracil (U).

Detailed explanation-2: -RNA consists of four nitrogenous bases: adenine, cytosine, uracil, and guanine. Uracil is a pyrimidine that is structurally similar to the thymine, another pyrimidine that is found in DNA. Like thymine, uracil can base-pair with adenine (Figure 2).

Detailed explanation-3: -Nucleotide 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. DNA and RNA molecules are polymers made up of long chains of nucleotides.

Detailed explanation-4: -Nitrogenous Bases in RNA RNA uses adenine, guanine, and cytosine, like DNA. However, in place of thymine, RNA uses uracil. Uracil pairs with adenine and guanine and cytosine pair together. Uracil and adenine form two hydrogen bonds, just like thymine and adenine do in DNA.

Detailed explanation-5: -Uracil is one of four nitrogenous bases found in the RNA molecule: uracil and cytosine (derived from pyrimidine) and adenine and guanine (derived from purine). Deoxyribonucleic acid (DNA) also contains each of these nitrogenous bases, except that thymine is substituted for uracil.

There is 1 question to complete.