GLYCOLYSIS (4th question group)

Question 1

Which of the following enzyme catalyzes the first step of glycolysis?

Answer 1

Hexokinase

Question 2

The general term used for the anaerobic degradation of glucose to obtain energy is?

Answer 2

fermentation

Question 3

Whenever the cell’s ATP supply is depleted, which of the following enzyme’s activity is increased?

Answer 3

phosphofructokinase - 1

Question 4

Cleavage of Fructose 1, 6-biophosphate yields?

Answer 4

An aldose and a ketose

Question 5

Dihydroxyacetone phosphate is rapidly and reversibly converted to?

Answer 5

Glyceraldehyde 3-phosphate

Question 6

The substrate used in the last step of glycolysis is?

Answer 6

Phosphoenolpyruvate

Question 7

High concentration of glucose 6-phosphate is inhibitory to?

Answer 7

Hexokinase

Question 8

The product formed in the first substrate level phosphorylation in glycolysis is?

Answer 8

3-phosphoglycerate

Question 9

Glycolysis converts?

Answer 9

Glucose into pyruvate

Question 10

where does glycolysis occur?

Answer 10

cytosol of all cells

Question 11

can glycolysis function either aerobically or anaerobically?

Answer 11

yes depending on the availability of O2 and the electron transport chain

Question 12

where does aerobic glycolysis occur in eukaryotes?

Answer 12

cardiac muscle, brain

Question 13

where does anaerobic glycolysis occur in eukaryotes?

Answer 13

skeletal muscle, erythrocytes cytoplasm

Question 14

what is the end product of anaerobic glycolysis?

Answer 14

lactate

Question 15

what is the end product of aerobic glycolysis?

Answer 15

pyruvate

Question 16

What is the net production of ATP, pyruvate, and NADH when one molecule of glucose undergoes glycolysis?

Answer 16

2 ATP, 2 NADH, and 2 pyruvate

Question 17

What is the main transformation that occurs during glycolysis?

Answer 17

Glycolysis produces ATP, pyruvate, and NADH by oxidizing glucose.

Question 18

which of the following would serve to allosterically inhibit the rate of glycolysis?

Answer 18

Increased ATP

Question 19

list the regulatory enzymes of glycolysis:

Answer 19

hexokinase
phosphofructo-kinase
pyruvate kinase

Question 20

how does insulin effect glycolysis?

Answer 20

increases glycolysis

decreases blood sugar

Question 21

how does glucagon effect glycolysis?

Answer 21

decreases glycolysis

increases blood sugar

Question 22

what is the pasteur effect?

Answer 22

The Pasteur effect is an inhibiting effect of oxygen on the fermentation process. It is a sudden change from anaerobic to aerobic process

Question 23

there is no lactate production in the presence of O2 except in?

Answer 23

tumour
embrional cells
retinal cells

Question 24

what enzyme catalyses pyruvic acid to lactate acid? (anaerobic)

Answer 24

lactic dehydrogenase

Question 25

what is the cori cycle?

Answer 25

transfer of lactic acid formed in the muscle to the liver and transfer of glucose from the liver to the muscles

Question 26

how do working muscles produce lactic acid?

Answer 26

anaerobic respiration

Question 27

what does the cori cycle prevent?

Answer 27

acid accumulation in working muscles