Multiple Choice
Which of the following statements best describes the role of genetics in determining physical fitness?
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1. Introduction to Genetics
Fundamentals of Genetics
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A gene can best be defined as:
A
a type of RNA involved in protein synthesis
B
a structure within the nucleus that contains all the genetic material
C
a molecule that catalyzes biochemical reactions in the cell
D
a segment of DNA that encodes a functional product, usually a protein
Verified step by step guidance1
Understand that a gene is a fundamental unit of heredity in living organisms.
Recognize that genes are segments of DNA, which is the molecule that carries genetic information.
Know that a gene contains the instructions to produce a functional product, most commonly a protein, but sometimes RNA molecules as well.
Differentiate a gene from other cellular components: it is not a type of RNA, nor a structure like the nucleus, nor an enzyme (which catalyzes reactions).
Conclude that the best definition of a gene is a segment of DNA that encodes a functional product, usually a protein.
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