#Question id: 293
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following types of bonds or interactions between lipid hydrocarbon tails is responsible for lipids forming a membrane bilayer or membranous vesicles in water
#Question id: 27484
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following is truly stating about the stereochemistry of D-Erythrose, L-Erythrose and D-Threose and L-Threose
1. D-Erythrose, L-Erythrose are enantiomers to each other
2. D-Erythrose, L-Erythrose are diastereomers to each other
3. D-Erythrose and D-Threose are diastereomers to each other
4. D-Erythrose, L-Erythrose are enantiomers to each other
#Question id: 22940
#Unit 5. Developmental Biology
#Question id: 2581
#Unit 2. Cellular Organization
Match the following toxins (Column I) with their effects (Column II) on actin.
|
Column I |
Column II |
|
A.
Cytochalasin D |
i. Enhances
nucleation by binding and stabilizing actin dimers and thereby lowering the
critical concentration. |
|
B.
Latrunculin |
ii. Binds at
the interface between subunits in F-actin,
locking adjacent subunits together and preventing actin filaments from
depolymerizing. |
|
C.
Jasplakinolide |
iii.
Depolymerizes actin filaments by binding to the (+) end of F-actin, where it
blocks further addition of subunits. |
|
D. Phalloidin |
iv. Binds and
sequesters G-actin, inhibiting it from adding to a filament end. |
#Question id: 2429
#Unit 2. Cellular Organization
Which of the following statements is (are) true of actin assembly?
a. ADP-actin can assemble into filaments.
b. Actin (+) ends grow faster than actin (-) ends.
c. ATP-actin can assemble into filaments.
d. Toxins that alter the assembly of actin filaments have been used as tools to study actin in living cells.