SAT Subject Biology Practice Question 112: Answer and Explanation

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Question: 112

2. Which of the following are in order of least complex to most complex, in terms of the amount of genetic information they carry?

I. Chromosome

II. Base pair

III. Codon

IV. Gene

A. I → II → III → IV
B. II → III → I → IV
C. III → II → I → IV
D. II → III → IV → I
E. II → IV → II → I

Correct Answer: D

Explanation:

Genetic information is stored in the form of DNA. DNA is composed of nucleotide base pairs, which are read as codons. Several codons compose one gene. Multiple genes are organized onto one chromosome.

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