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Jugar Test
1. 
What type of amino acids would you expect to find in the hydrophobic core of a membrane protein?
A.
Polar
B.
Hydrophobic Non-Polar
C.
Hydrophilic Polar
D.
Acidic
2. 
What effect does cholesterol have on membrane fluidity
A.
Decreases Fluidity at High temperatures
B.
Increases Fluidity at low temperatures
C.
Both A and B
D.
It has no effect
3. 
Which of the following proteins penetrate the hydrophobic core of the membrane?
A.
Transmembrane proteins
B.
Peripheral proteins
C.
Extracellular proteins
D.
Cytoplasmic proteins
4. 
What type of molecules can pass through a membrane via simple diffusion?
A.
Small charged molecules
B.
Large, uncharged polar molecules
C.
Hydrophobic molecules
D.
Ions
5. 
True or False; Integral proteins are usually embedded in the membrane and can serve multiple functions, such as transport and acting as enzymes.
A.
True
B.
False
6. 
True or False; In hypertonic solutions, water moves into the cell, causing it to swell.
A.
False
B.
True
7. 
Explain why drinking seawater is harmful to cells at the cellular level.
8. 
Describe the structure of hemoglobin and how it is suited for its function.
9. 
What are the key features of a porin protein and its role in gram-negative bacteria?
10. 
In the Na+/K+ pump, _____ are pumped out of the cell and _____are pumped into the cell.
A.
3 Sodium Ions & 2 Potassium Ions
B.
3 Na+ Ions & 2 K+ Ions
C.
4 Sodium Ions & 2 Potassium Ions
D.
2 Sodium Ions & 3 Potassium Ions
11. 
Aquaporins are channels that _________ across the cell membrane.
A.
Transport water
B.
Transport Blood
C.
Transport Oxygen
D.
Transport Electrolytes
12. 
In active transport, the movement of ions is typically _____ their concentration gradient, which requires the use of ____.
A.
Against, CSE
B.
With, ATP
C.
Against, ATP
D.
With, Na+
13. 
Which type of membrane transport uses transport proteins but does not require energy?
A.
Simple diffusion
B.
Facilitated diffusion
C.
Active transport
D.
Osmosis
14. 
What is the movement of water across a semipermeable membrane called?
A.
Active transport
B.
Facilitated diffusion
C.
Osmosis
D.
Simple diffusion
15. 
Which transport mechanism moves molecules down their concentration gradient without the help of proteins?
A.
Osmosis
B.
Facilitated diffusion
C.
Active transport
D.
Simple diffusion
16. 
Which type of transport moves molecules against their concentration gradient using energy?
A.
Active transport
B.
Osmosis
C.
Simple diffusion
D.
Facilitated diffusion
17. 
Draw and label the 6 pathways of the sodium-potassium pump, indicating which steps require ATP. (OR write out and know how to draw it)
A.
draw it
B.
write it out
C.
ignore it
D.
slack off