객관식
Which of the following techniques allows for fragments to be separated by size?
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34. Nucleic Acids
Intro to Nucleic Acids
객관식
Why is the number of (guanines) in an organism's DNA typically equal to the number of (cytosines)?
A
Because (guanine) and (cytosine) form a base pair through hydrogen bonds.
B
Because (guanine) and (cytosine) are both pyrimidines.
C
Because (guanine) and (cytosine) are both involved in RNA synthesis.
D
Because (guanine) and (cytosine) are both purines.
검증된 단계별 안내1
Understand the structure of DNA: DNA is composed of two strands that form a double helix. Each strand is made up of nucleotides, which include a sugar, a phosphate group, and a nitrogenous base.
Identify the nitrogenous bases: In DNA, there are four types of nitrogenous bases: adenine (A), thymine (T), guanine (G), and cytosine (C).
Learn about base pairing rules: In the DNA double helix, bases pair specifically with each other through hydrogen bonds. Adenine pairs with thymine (A-T) through two hydrogen bonds, and guanine pairs with cytosine (G-C) through three hydrogen bonds.
Recognize the significance of base pairing: Because guanine and cytosine form a base pair, the number of guanine bases in a DNA molecule is typically equal to the number of cytosine bases. This is due to the complementary nature of the DNA strands.
Clarify the misconception: Guanine and cytosine are not both pyrimidines or purines. Guanine is a purine, while cytosine is a pyrimidine. Their pairing is based on hydrogen bonding, not their classification as purines or pyrimidines.
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