A signal peptidase

a. removes a signal sequence from a polypeptide chain after it passes through a channel into the rough ER.
b. attaches a signal sequence to a growing polypeptide chain before it passes into the rough ER.
c. attaches an acetyl group to the 5? end of a polypeptide after removal of the initial methionine.
d. removes the initial methionine from a polypeptide chain.


Ans: a. removes a signal sequence from a polypeptide chain after it passes through a channel into the rough ER.

Biology & Microbiology

You might also like to view...

In cases of suspected foodborne or waterborne infections, fecal samples should be inoculated into a variety of selective media

Indicate whether the statement is true or false.

Biology & Microbiology

What happens during agglutination?

A. Antibodies bind to a pathogen and cause it to precipitate. B. Antibodies trigger the activation of the complement system. C. Phagocytes engulf a pathogen coated with antibody. D. All of the answer options are correct.

Biology & Microbiology

Which elements are found in all carbohydrates, lipids, proteins, and nucleic acids?A) nitrogenB) carbonC) hydrogenD) oxygenE) phosphorusF) sulfur

What will be an ideal response?

Biology & Microbiology

Using the information below calculate the total magnification

Objective magnification: 100 Ocular magnification: 5 (Hint: Objective x Ocular = Total)

Biology & Microbiology