The signal recognition particle (SRP)is a _____,and its function is to ______.
A)DNA:protein complex,transport proteins into the eukaryotic nucleus
B)multisubunit protein,modify proteins
C)ribosome complex,catalyze posttranslational modification
D)ribonucleoprotein,bind the N-terminal end of growing polypeptides for membrane translocation
E)none of the above

Question

Quizplus · Accepted Answer

The signal recognition particle (SRP) is a ribonucleoprotein (composed of both RNA and protein) that binds to the N-terminal end of growing polypeptides and targets them for membrane translocation. The SRP binds to the ribosome, halts translation, and brings the ribosome-polypeptide complex to the endoplasmic reticulum membrane for insertion or secretion.

The Signal Recognition Particle (SRP)is a _____,And Its Function Is