Question

what does it mean by “cells turn on different genes?” a cells will only turn on, or express, the genes whose proteins are needed. b all cells turn on different genes, giving them different functions. c all cells have different genes, giving them different functions. d all of the above

Explanation:

Cells express different genes based on their functional needs. Different gene - expressions lead to different functions. All cells in a multicellular organism have the same genome, but they turn on different genes. Option a is correct as cells express genes for needed proteins. Option b is correct as differential gene - expression gives cells different functions. Option c is incorrect because all cells in a multicellular organism (except for mutations) have the same genes, not different ones.

Answer:

A. Cells will only turn on, or express, the genes whose proteins are needed., B. All cells turn on different genes, giving them different functions.