객관식
Given the partial DNA coding strand sequence 5'-ATG GAA TGC-3', which amino acid sequence is encoded by this segment?
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7. DNA and Chromosome Structure
DNA Structure
객관식
Which of the following best describes the overall structure of DNA as depicted in the diagram?
A
A single-stranded molecule with ribose sugar and uracil bases
B
A linear chain of amino acids joined by peptide bonds
C
A triple helix with parallel strands and identical base sequences
D
A double helix with two antiparallel strands held together by complementary base pairing
검증된 단계별 안내1
Identify the key features of DNA structure from the options given, focusing on sugar type, strand number, and base pairing.
Recall that DNA is composed of two strands forming a double helix, where each strand runs in opposite directions (antiparallel).
Understand that the strands are held together by complementary base pairing: adenine pairs with thymine, and cytosine pairs with guanine.
Note that DNA contains deoxyribose sugar and does not contain uracil; uracil is found in RNA instead.
Eliminate options that describe RNA (single-stranded with uracil), proteins (amino acid chains), or incorrect helix structures (triple helix), confirming that the correct description is a double helix with two antiparallel strands held together by complementary base pairing.
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