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Elliott & Elliott: Biochemistry and Molecular Biology 4e
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Elliott & Elliott: Biochemistry and Molecular Biology 4e

Chapter 26

Instructions

Choose your answer by clicking the radio button next to your choice and then press 'Submit' to get your score.

Question 1

Proteins directed to which of the following organelles are synthesized by ribosomes attached to the rough endoplasmic reticulum?

a) nucleus

b) mitochondria

c) lysosomes

d) peroxisomes

Question 2

What directs vesicles packaged in the Golgi cisternae to their appropriate place in the cell?

a) A specific carbohydrate bound to the proteins.

b) A sequence of amino acids within the proteins.

c) Complementary SNARE proteins on the vesicle and its target organelle.

d) Coatomer or clathrin proteins coating the vesicle.

Question 3

In what form do proteins cross the mitochondrial membranes?

a) In unfolded extended form without chaperones.

b) In unfolded extended form attached to Hsp70 chaperones.

c) Bound to an importin protein via a signal sequence

d) In fully folded form

Question 4

How do proteins enter peroxisomes?

a) Unfolded, using an N-terminal signal sequence.

b) Folded, using an N-terminal signal sequence.

c) Unfolded, using a C-terminal or internal signal sequence.

d) Folded, using a C-terminal or internal signal sequence

Question 5

What is the energy source for transport of molecules into and out of the nucleus?

a) ATP hydrolysis within the cytoplasm.

b) GTP hydrolysis within the cytoplasm.

c) ATP hydrolysis within the nucleus.

d) GTP hydrolysis within the nucleus.

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