2A: Cell Biology

Question 1

How does cholesterol contribute to membrane fluidity at low, moderate, and high temperatures?

Answer 1

low-increase fluidity

moderate to high-decrease fluidity (more rigid)

Question 2

SN2 mechanisms favor which type of polar solvents?

Answer 2

aprotic such as acetone or DMSO

Question 3

What happened if hemoglobin is found in the plasma?

Answer 3

Hb released in plasma means RBC ruptured/lysed

Question 4

Fastest way for transport of transcript with short half-life

Answer 4

active transport

Question 5

(T/F) Prokaryotes undergo mitosis

Answer 5

False

Question 6

Retrograde transport will send proteins back to where?

Answer 6

endoplasmic reticulum-where protein transcription primarily occurs

Question 7

If a structure has polar groups, where would the receiving cell receptors be located?

Answer 7

embedded in cell membrane (polar so can’t readily cross phospholipid bilayer of cell membrane)

Question 8

where are mature proteins that will be secreted cleaved in the cell?

Answer 8

endomembrane system