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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?

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?

A

Emulsified but undigested fat

23
Q

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

A

Hydrophilic, facilitated diffusion

24
Q

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

A

A K+ channel

25
Q

Which process is illustrated in the figure below? Ca2+ (high to low)

A

Facilitated diffusion

26
Q

In a trial to look at the impact of Alli on weight loss, what treatment is the control group likely to revive?

A

Placebo

27
Q

What does lipase do?

A

Digests fats

28
Q

What do ribosomes do?

A

Synthesize proteins

29
Q

What happens to a human cell in a hypotonic environment?

A

It swells

30
Q

What are properties of molecules that can cross a cell membrane by simple diffusion?

A

Small, uncharged, hydrophobic (non polar)

31
Q

Which of the following combinations of phospholipid tails and temperatures would you predict to create the most viscous membrane?

A

Long, saturated tails at a cold temperature

32
Q

What is a peripheral protein?

A

D) below the big mitochondria looking thing on the outside

33
Q

Which of the following is not correctly matched with its type of membrane transport?

A

O2 moving up its gradient-simple diffusion

34
Q

The membrane separating solution A from B is Not permeable to glucose (2M) and not permeable to Cl (2M). What will happen to water?

A

No net movement

35
Q

An organism is adopted to live at high temperatures. What do you predict about its membrane phospholipids?

A

Long and saturated

36
Q

An alien ha cells with an internal solute concentration of 15% solutes. Which solution would allow the alien cells to maintain their shape?

A

All would equally be effective

37
Q

What is the cholesterol?

A

The tower of little circles located inside the innermbrane thingy

38
Q

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?

A

Glucose will move from solution A to B

39
Q

The membrane separating solution A (2M glucose) from solution B (1M Cl) is not permeable to Cl. What will happen to water?

A

It will move from solution B to solution A

40
Q

Which process requires an input of energy?

A

Active transport

41
Q

A person has just consumed an incredible amount of salt. What effect does this have on their blood?

A

It has became hypertonic

42
Q

An isotonic solution has…?

A

The same concentration of solutes as our cells

43
Q

A person is severely dehydrated after running the Bataan Memorial Death March. What treatment do they need?

A

Hypotonic IV solution, fast

44
Q

A person has eaten a lot of salt. What should they drink?

A

Water

45
Q

Drinking a very large amount of water in a short period of time (and holding ones urine) will cause a persons blood to become?

A

Hypotonic

46
Q

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?

A

Fluid replacement with an isotonic solution

47
Q

Swelling of the brain can happen when the blood becomes

A

Hypotonic

48
Q

In a severely dehydrated person, what is likely to be happening to their cells?

A

They are shrinking

49
Q

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?

A

They will shrivel

50
Q

Which of the following is most likely to enter a cell by simple diffusion?

A

O2

Bio Final (5 decks)

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