Quizzes

Question 1

The clip shown in conceptually related to which living entity?

A. E. Coli
B. Plant cell
C. Virus
D. Neuron

Answer 1

Virus (since they drain energy, NOT generate)

Question 2

What is the length scale of a typical E. Coli?

A. 0.1 micron
B. 1 micron
C. 10 micron
D. None of the above

Answer 2

1 micron

Question 3

Select all that apply: Lipid membranes behave as a

1. Resistor
2. Liquid crystal
3. Cell boundary
4. Capacitor

Answer 3

All of the above (Resistor, Liquid crystal, cell boundary, and capacitor)

Question 4

Lipid bilayers are made of

A. Hydrophobic molecules only
B. Hydrophilic molecules only
C. Amphiphilic molecules only
D. None of the above

Answer 4

Amphiphilic molecules only

Question 5

Nernst equation gives membrane potential as a function of the

A. Concentrations of single ion species
B. Concentrations of multiple ion species
C. Density of lipids
D. Densities of Na and K channels

Answer 5

Concentrations of single ion species

Question 6

The first paper of Hodgkins and Huxley made the following crucial contribution

A. Developed the cable equation
B. Developed patch clamp technique
C. Developed voltage clamp technique
D. None of the above

Answer 6

Developed voltage clamp technique

Question 7

How did Hodgkin and Huxley regulate Na+ current?

A. By using toxins
B. By diluting axonal fluid
C. By adding potassium ions
D. By diluting sea water

Answer 7

By diluting seawater

Question 8

True or False: Patch clamp is used to measure gating of ion channels

Answer 8

True

Question 9

True or False: Hodgkin and Huxley discovered the structure of potassium channels.

Answer 9

False