Ribosomes
A)are the only sites where proteins are made
B)contain protein in their chemical makeup
C)contain RNA in their chemical makeup
D)consist of subunits that are constructed inside the nucleus
E)are characterized by all of the above

Question

Quizplus · Accepted Answer

Ribosomes are the molecular machines that synthesize proteins according to the sequence of messenger RNA molecules. They consist of both proteins and RNA. The small subunit of a ribosome is made up of one RNA molecule and about 33 proteins, while the large subunit has three RNAs and about 49-50 proteins. The subunits are not constructed inside the nucleus but rather in the nucleolus. Therefore, all the choices are valid statements about ribosomes, making option E the correct answer.