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Exam 3

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created 1 year ago by paulinapollas
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1

Among the products of glycolysis, which compounds below DO NOT contain energy that can be used by other biological reactions and/or are not products of glycolysis

  1. CO2 only
  2. pyruvate
  3. ATP
  4. NADH

CO2 only

2

Glycolysis occurs in the __ of eukaryotic cells

  1. chloroplast
  2. cytoplasm
  3. mitochondria
  4. thylakoid membrane
  5. none of the above

cytoplasm

3

Which of the following statements describes NAD+?

  1. NAD+ is reduced to NADH during glycolysis, pyruvate oxidation, and the citric acid cycle
  2. NAD+ is oxidized by the action of hydrgeases
  3. In the absence of NAD+, glycolysis can still function
  4. NAD+ has more chemical energy than NADH

NAD+ is reduced to NADH during glycolysis, pyruvate oxidation, and the citric acid cycle

4

The stage of mitosis in which chromosomes are actively being pulled to opposite poles of the cell is called

  1. Prophase
  2. Telophase
  3. Metaphase
  4. Anaphase
  5. Cytokinesis

Anaphase

5

Cells undergo fermentation as one way to

  1. Make beverages for cell block parties
  2. Recycle NADH to NAD+, and eliminate pyruvate
  3. Recycle aluminum, and eliminate waste
  4. Make ATP from ATP and phosphate ions
  5. Use oxygen to except electrons and form water

Recycle NADH to NAD+, and illuminate pyruvate

6

During strenuous exercise, anaerobic conditions can result if the cardiovascular system cannot supply oxygen fast enough to meet the demands of muscle cells. Assume that a muscle cells demand for ATP under anaerobic conditions remain the same as it was under aerobic conditions. What would happen to the cells rate of glucose utilization?

  1. Glucose utilization would increase a lot
  2. Glucose utilization would increase a little
  3. Glucose utilization would remain the same
  4. Glucose utilization would decrease a little
  5. Glucose utilization would decrease a lot

Glucose utilization would increase a little

7

In addition to ATP, what are the end products of glycolysis?

  1. H2O, FADH2, and citrate
  2. CO2 and H2O
  3. CO2 and NADH
  4. CO2 and pyruvate
  5. NADH and pyruvate

NADH & pyruvate

8

In glycolysis, for each molecule of glucose oxidized to pyruvate

  1. Two molecules of ATP are used and four molecules of ATP are produced
  2. Six molecules of ATP are used and six molecules of ATP are produced
  3. Two molecules of ATP are used and two molecules of ATP are produced
  4. Two molecules of ATP are used and six molecules of ATP are produced
  5. For molecules of ATP are used in two molecules of ATP are produced

Two molecules of ATP are used in for molecules of ATP are produced

9

If oxygen is present in the sufficient concentration, animal cells will convert pyruvate to the followings products:

  1. CO2
  2. acetyl-CoA
  3. glucose
  4. enzymes
  5. both "a" and "b"

both "a" and "b"

10

The final electron acceptor in aerobic respiration is __, which combines with hydrogen ions to form water

  1. nitrogen
  2. NAD+
  3. oxygen
  4. carbon dioxide
  5. NADP+

oxygen

11

The reactions of eukaryotic aerobic respiration take place in

  1. The cytoplasm
  2. Mitochondria
  3. Chloroplast
  4. Nuclei
  5. Ribosomes

Mitochondria

12

An animal using aerobic respiration is kept in a sealed container for short time. What would happen to the relative concentration of the gases in the container over that time?

  1. Oxygen would increase in carbon dioxide would decrease
  2. Both oxygen and carbon dioxide would increase
  3. Oxygen would decrease and carbon dioxide would increase
  4. Both oxygen and carbon dioxide would decrease

Oxygen would decrease and carbon dioxide would increase

13

Most of the ATP in yourselves is made by

  1. Lactic acid fermentation
  2. Alcohol fermentation
  3. Glycolysis and lactic acid fermentation with diffusion to the blood
  4. Aerobic respiration including curb cycle and ETC/chemiosmosis
  5. Phospholipid

Aerobic respiration including curb cycle and ETC/chemiosmosis

14

The light reactions of photosynthesis produce

  1. Light energy
  2. CO2 and ATP
  3. H2O and NADPH
  4. ATP, O2, and NADPH
  5. Glucose and O2

ATP, O2, and NADPH

15

Molecule B (acytel-CoA) is attached to a four carbon oxaloacetate to form a six carbon molecule. Where did molecule B come from?

  1. Oxidation of CO2
  2. Oxidation of pyruvate
  3. Oxidation of fructose
  4. Intelligent design
  5. Oxidation of ethanol

Oxidation of pyruvate

16

The stage of photosynthesis that actually fixes carbon dioxide and produces sugar component is

  1. The Calvin Benson cycle
  2. Photosystem I
  3. Photosystem II
  4. The light reactions
  5. The splitting of water

The Calvin Benson cycle

17

Which of these is not a product of any process of photosynthesis

  1. ATP
  2. NADPH
  3. FADH2
  4. O2
  5. NADH

FADH2

18

A plant is kept in the dark, sealed container. What will happen to the composition of the gases in the container?

  1. The amount of oxygen will increase
  2. The amount of oxygen will decrease
  3. The amount of nitrogen will decrease
  4. The amount of nitrogen will increase
  5. The amount of water will decrease

The amount of oxygen will decrease

19

Chlorophyll-a molecules absorb all of the following wavelengths of light well except

  1. Violet
  2. Blue
  3. Read
  4. Green

Green

20

The oxygen release during photosynthesis comes from

  1. Hydrolysis of carbon dioxide
  2. ATP
  3. Hydrolysis of water
  4. Farmers
  5. Glucose

Hydrolysis of water

21

The carbon in glucose produced during photosynthesis ultimately comes from

  1. Carbohydrates
  2. Carbon dioxide gas
  3. Noncylic photophosphorylation
  4. ribulose bisphosphate carboxylase

Carbon dioxide gas

22

You are growing animal cells in liquid culture medium and the cells do not look very healthy. After some checking you discover that there is a lot of lactic acid in the culture fluid. What is probably wrong in this culture?

  1. The cells have too much O2
  2. The cells are not getting enough O2
  3. Ethanol is being produced in excess
  4. Too much sugar is in the medium

The cells are not getting enough O2

23

___ excepts electrons and hydrogen ions at point B and forms __

  1. Oxygen; water
  2. Oxygen; carbon dioxide
  3. Water; hydrogen peroxide
  4. NAD+; NADH
  5. FAD; FADH2

Oxygen; water

24

The overall (simplified) reaction of photosynthesis is

  1. the conversion of 1 mole of N2 to 2 moles of N2 using the energy of light
  2. the transport of 3 moles of Na+ out and 2 moles of K+ into a cell using the energy of light
  3. the elevation of one mole of water 100m up the trunk of a tree using the energy of light
  4. the conversion of 6 moles of CO2 and 6 moles of H2O to one mole of C6H12O6 and 6 moles of O2, using the energy of light
  5. none of the above

the conversion of 6 moles of CO2 and 6 moles of H2O to one mole of C6H12O6 and 6 moles of O2, using the energy of light

25

What is the primary function of the Calvin cycle?

  1. Use NADPH to release carbon dioxide
  2. Split water and release oxygen
  3. Synthesize simple sugars from carbon dioxide, using ATP and NADPH
  4. use ATP to release carbon dioxide

Synthesize simple sugars from carbon dioxide, using ATP and NADPH

26

In C3 plants the conservation of water in hot weather by closing the stomata can lead to lack of CO2 for synthesis, and over abundance of O2, causing a process called __

  1. The opening of stomata
  2. Photorespiration
  3. A shift to C4 photosynthesis
  4. photosynthesis

Photorespiration

27

Why are C4 plants more suited to hot climate then C3 plants?

  1. They do not close there stomota and hot dry weather
  2. They ivolved in cold weather but migrated to the tropics where they were more suitable
  3. They keep fixing carbon dioxide even when the stomata of the leaf our closed, due to CO2 pump
  4. The same cells that bind carbon dioxide perform the Calvin cycle

The same cells that bind carbon dioxide performed the Calvin cycle

28

The phase of the cell cycle labeled as be where DNA is replicated is

  1. G1
  2. G2
  3. S
  4. M
  5. G0

S

29

Cells will eventually divide if they receive the proper signals at the checkpoint at the end of which phase of the cell cycle?

  1. G1
  2. S
  3. Cytokinesis
  4. M
  5. G2

G2

30

In the first phase of mitosis, the DNA of a cell starts to condense, and the proteins needed for cell division start to assemble. What is it called

  1. Metaphase
  2. Prophase
  3. Telophase
  4. Anaphase
  5. Cytokinesis

Prophase

31

Which of the following is most true concerning cancer cells?

  1. When they stop dividing, they do so at random points in the cell cycle
  2. When they stop dividing, they do so at random points in the cell cycle; they are not subject to cell cycle controls; and they do not exhibit density dependent inhibition when growing a culture
  3. They are not subject to cell cycle controls
  4. When they stop dividing, they do so at random points in the cell cycle, and they are not subject to cell cycle controls

When they stop dividing, they do so at random points in the cell cycle; they are not subject to cell cycle controls; and they do not exhibit density dependent inhibition when growing a culture


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