Monday, December 23, 2013

Transport into the Nucleus

Part A

Correct
All processes involving DNA take place in the nucleus.
Part B

Correct
This statement is false; the nuclear envelope is continuous with the endoplasmic reticulum.
Part C

Correct
Cytoplasmic proteins called importins bind to large proteins containing an NLS and mediate their transport across the nuclear membrane through an active transport (energy-requiring) process.
Part D

Correct
A 25,000-dalton protein is small enough to diffuse through nuclear pores without any expenditure of energy.
Part E

Correct
Fluorescent tags make the location of the proteins easy to visualize.
Part F

Correct
The nuclear localization signal is only present in the fusion protein that enters the nucleus.

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