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Bio Final > Exam 2 > Flashcards

Exam 2 Flashcards

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1
Q

How can the protein in the diagram below be described?

A

It is an integral membrane protein

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2
Q

What is needed in order for K+ to move from outside the cell to inside the cell? (Low to high)

A

A K+ pump

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3
Q

Phospholipids are best described as?

A

Amphipathic

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4
Q

Which of the following is not a component of plant cell membranes?

A

Cellulose and cholesterol

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5
Q

Where does Alli bind lipase?

A

The active site

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6
Q

A person taking Alli is at risk for vitamin deficiencies. Which of these is LEAST likely to be a problem for someone taking Alli?

A

Vitamin C

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7
Q

The process of breaking up large fat globules Ito small fat droplets is known as ______?

A

Emulsification

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8
Q

A lipase inhibitor has a structure more similar to glucose than a lipid. What can you infer about this inhibitor?

A

It is a non-competitive inhibitor

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9
Q

Where/to what does a competitive enzyme inhibitor bind?

A

To the active site of an enzyme

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10
Q

What do enzymes do to speed up chemical reactions?

A

Decrease the activation energy

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11
Q

What type of reaction releases energy?

A

Exergonic

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12
Q

Which of the following accurately distinguishes plant cells from animal cells?

A

Cell wall

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13
Q

Which of the following is true about humans cells?

A

They are eukaryotic, the DNA is contained in the nucleus

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14
Q

Which of the following is a function of the nucleus?

A

It holds cellular DNA

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15
Q

When digestive enzymes break down polysaccharides, how can these reactions be described?

A

Catabolic, hydrolytic, exergonic

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16
Q

A reaction has higher energy reactants and lower energy products. How can this reaction be described?

A

Exergonic

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17
Q

The reaction shown is? (High to low)

A

Exergonic

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18
Q

The p value statistical test was 0.03. What can you conclude?

A

Surgery works!

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19
Q

Which energy level is changed when a reaction is catalyzed by an enzyme?

A

B) transition state

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20
Q

The p value from the statistics test was 0.08. How should the data be interpreted?

A

They clearly do not support the hypothesis

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21
Q

What does Alli do?

Study These Flashcards
A

It is a competitive inhibitor of lipase

22
Q

In a person taking Alli, what do you predict to find in their feces after a meal containing a lot of fat?

Study These Flashcards
A

Emulsified but undigested fat

23
Q

Calcium 2+ ions are ______, so cross a membrane down their gradient by ______?

Study These Flashcards
A

Hydrophilic, facilitated diffusion

24
Q

What is needed for K+ to move from inside the cell to outside the cell? (High to low)

25
Which process is illustrated in the figure below? Ca2+ (high to low)
Facilitated diffusion
26
In a trial to look at the impact of Alli on weight loss, what treatment is the control group likely to revive?
Placebo
27
What does lipase do?
Digests fats
28
What do ribosomes do?
Synthesize proteins
29
What happens to a human cell in a hypotonic environment?
It swells
30
What are properties of molecules that can cross a cell membrane by simple diffusion?
Small, uncharged, hydrophobic (non polar)
31
Which of the following combinations of phospholipid tails and temperatures would you predict to create the most viscous membrane?
Long, saturated tails at a cold temperature
32
What is a peripheral protein?
D) below the big mitochondria looking thing on the outside
33
Which of the following is not correctly matched with its type of membrane transport?
O2 moving up its gradient-simple diffusion
34
The membrane separating solution A from B is Not permeable to glucose (2M) and not permeable to Cl (2M). What will happen to water?
No net movement
35
An organism is adopted to live at high temperatures. What do you predict about its membrane phospholipids?
Long and saturated
36
An alien ha cells with an internal solute concentration of 15% solutes. Which solution would allow the alien cells to maintain their shape?
All would equally be effective
37
What is the cholesterol?
The tower of little circles located inside the innermbrane thingy
38
The membrane between solution A and B is permeable to glucose (2M) but not Cl (1M Cl, 1M glucose). Considering only the solutes, what will happen?
Glucose will move from solution A to B
39
The membrane separating solution A (2M glucose) from solution B (1M Cl) is not permeable to Cl. What will happen to water?
It will move from solution B to solution A
40
Which process requires an input of energy?
Active transport
41
A person has just consumed an incredible amount of salt. What effect does this have on their blood?
It has became hypertonic
42
An isotonic solution has...?
The same concentration of solutes as our cells
43
A person is severely dehydrated after running the Bataan Memorial Death March. What treatment do they need?
Hypotonic IV solution, fast
44
A person has eaten a lot of salt. What should they drink?
Water
45
Drinking a very large amount of water in a short period of time (and holding ones urine) will cause a persons blood to become?
Hypotonic
46
A person has lost a lot of blood after being gored by a bull during the running of the bulls festival. What treatment do they need?
Fluid replacement with an isotonic solution
47
Swelling of the brain can happen when the blood becomes
Hypotonic
48
In a severely dehydrated person, what is likely to be happening to their cells?
They are shrinking
49
Mammalian blood contains the equivalent of 0.15M NaCl. Seawater contains the equivalent of 0.45M NaCl. What will happen if mammalian red blood cells are transferred to sea water?
They will shrivel
50
Which of the following is most likely to enter a cell by simple diffusion?
O2

Bio Final (5 decks)

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