Multiple Choice
What part(s) of the nucleotide make up the backbone (sides) of the DNA molecule?
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14. DNA Synthesis
Discovering the Structure of DNA
Multiple Choice
Which of the following statements about the structure of DNA molecules is correct?
A
DNA has a double helix structure with two strands running in opposite directions.
B
Adenine pairs with cytosine in DNA.
C
DNA is composed of a single strand of nucleotides.
D
The sugar in DNA is ribose.
Verified step by step guidance1
Understand the basic structure of DNA: DNA is a molecule that carries genetic information in living organisms and is composed of two strands that form a double helix.
Identify the correct base pairing in DNA: In DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G).
Recognize the directionality of DNA strands: The two strands of DNA run in opposite directions, which is referred to as antiparallel orientation.
Differentiate between DNA and RNA sugars: The sugar in DNA is deoxyribose, not ribose. Ribose is found in RNA.
Evaluate the given statements: Based on the understanding of DNA structure, identify the statement that correctly describes DNA as having a double helix structure with two strands running in opposite directions.
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