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100

Which of the following phospholipid movements is active (requires energy)?

  1. Rotation

  2. Flexation

  3. Flip-Flop

  4. Lateral Movement

Flip-Flop

100

What is the main difference between active and passive transport?


Active transport goes from an area of low concentration to high concentration. 

Passive transport goes from an area of high concentration to low concentration

100

W

hat is the function of Snares? 

  1. Docking vesicles at the membrane

  2. Coating proteins which forms a basket around the vesicles

  3. Helps actively transport proteins into the nucleus 

  4. Recognize localization signals and move them into the ER.  

Docking vesicles at the membrane

100

Stability of microtubules is accomplished by


  1. Phosphorylation of microtubules

  2. Interaction with capping proteins

  3. Growth of microtubules from gamma-tubulin ring complexes

  4. Degradation of unstable microtubules

  5. All of the above

interaction with capping proteins

100

What is the charge inside and outside the cell?

Negative inside of the cell

Positive outside the cell

200

What do carbohydrates attached to cell-surface proteins and lipids provide a cell?

  1. Protection from mechanical and chemical damage

  2. A slimy coat that prevents cells from sticking to one another   

  3. A distinctive identity in cell-cell recognition

  4. All of the above

All of the Above

200

An influx of what triggers an action potential? 

  1. Positive ions 

  2. Negative ions 

  3. Neutral ions 

positive ions

200

What are the major differences between single-pass and double-pass transmembrane?

Single pass only has one stop and start signal sequence and the start sequence is cleaved off. 

Double pass has a start and stop sequence in the middle of the peptide chain and they are never cleaved off. 

200

 Which of the below is an example of a filament proteins?


  1. Actin

  2. porin

  3. serotonin

  4.  voltage-gated ion channel

  5.  transcription factor

Actin

200

Hen a molecules is traveling through the Nuclear pore what type of energy do it require?

a) ATP

b) ADP

c) GTP

d) NADPH

GTP

300

What are the advantages of compartmentation?

Allows for order within the cell and seperation of chemical processes.

300

What is the most tightly regulated ion in the cells? 

a) Na+

b) Cl-

c) K+

d) Ca2+

Ca2+

300

What is the main function of a clathrin coat?

spherical shape and transport of molecules forward.

300

Plasma membranes are extremely thin and fragile, requiring an extensive support network of fibrous proteins. This network is called the ________.


  1. Cortex

  2.  Attachment complex

  3. Cytoskeleton

  4. Spectrin

Cortex

300

In addition to protecting the cell the plasma membrane plays a vital role in many other processes. Which of the below statements is NOT a process which involves the plasma membrane?

a) Receiving signals from the environment via membrane receptors and relaying them to the cytosol     


b) replication of the cellular DNA for cell division  


c)Import and export of molecules 


d)Facilitating cell movement and expansion                        

replication of the cellular DNA for cell division

400

What are the different ways the membrane maintains fluidity?

Chain lengths, number of double bonds, and cholesterol.

400

When the mechanical movement of cilia in auditory cells causes the channels to open what is the type of channel?

a) Ion Channel 

b) Ligand-gated ion channels

c) Voltage-gated ion channels

d) Stress-gated ion channels

Stress-gated ion channels

400

Glycosylation is the covalent attachment of oligosaccharide side chains, what does this form? 

  1. Stable protein structures

  2. The carbohydrate layer

  3. Nuclear pores

  4. Transport membranes 

The carbohydrate layer

400

Muscles contract due to the shrinking of sarcomeres. What are the actin filaments anchored to (using the + end of the actin)

  a) myosin 

b) myofibrils

c)Z-Disk

d)Kinesin

Z-Disk

400

Which motor protein(s) transport cargo along the microtubule to the positive and negative ends? 

a) kinesins transport towards the negative end and dyenins towards the positive end

b) only kinesins transport the cargo to both ends

c) kinesins and dyenins work together to transport cargo to both ends

d) kinesins transport towards the positive end and dyenins towards the negative end

kinesins transport towards the positive end and dyenins towards the negative end

500

What protein helps Red blood cells maintain their shape?

a) spectrin 

b)

Spectrin

500

What does a rush of Ca2+  do? 

  1. Tells the vesicles to fuse with membranes releasing neurotransmitters

  2. Blocks an action potential from priming 

  3. Increases the rate of an action potential

  4. Ca2+ isn’t important 

Tells the vesicles to fuse with membranes releasing neurotransmitters

500

What happens if the number of unfolded proteins exceeds the chaperone folding capacity? 

  1. The cell can undergo apoptosis 

  2. The unfolded protein response will trigger gene expression of chaperone proteins

  3. Nothing Happens 

  4. Both A&B are correct. 

Both A&B are correct

500

A couple is told by their doctor that the reason why they cannot have children is that the sperm of the male lack motility because it does not have the structures responsible for propulsion. Which cellular structures are likely to be the underlying cause of this lack of motility?


  1. Microtubules

  2. Vacuole 

  3. Actin Filaments

  4. Golgi Apparatus

Microtubules

500

Charged molecules pass freely through a lipid bilayer

True or False

False, the charged molecules cannot go through the hydrophobic center of the bilayer.

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