The catalog of all proteins functioning in a cell is the:
A) metabolome.
B) proteasome.
C) lysosome.
D) proteome.
E) genome.

Question

Quizplus · Accepted Answer

The term "proteome" refers to the complete set of proteins expressed by an organism, cell, tissue, or system at a given time. Therefore, the catalog of all proteins functioning in a cell is its proteome. A is incorrect because the metabolome includes all of the small molecule metabolites present in a cell. B is incorrect because the proteasome is a complex of proteins responsible for degrading damaged or unwanted proteins. C is incorrect because the lysosome is a membrane-bound organelle that breaks down cellular waste and debris through hydrolysis. E is incorrect because the genome refers to the complete set of genetic material (DNA or RNA) in an organism, which includes the genes that encode the proteins of the proteome.

The Catalog of All Proteins Functioning in a Cell Is