Which of the following BEST defines a gene?
A) The observable traits or characteristics displayed by an organism
B) A unit of DNA on a chromosome that encodes instructions for making a particular protein
C) A type of highly specialized cell that directs the development of other cells
D) One of several thousand different protein molecules

Question

Quizplus · Accepted Answer

A gene is a unit of DNA that contains the instructions for making a specific protein or RNA molecule. These instructions are used by cells to carry out specific biological functions. Genes are located on chromosomes, which are found in the nucleus of cells.

Which of the Following BEST Defines a Gene