Chapter 22

Question 1

Microvilli provide a large or small surface area which allows for more efficient nutrient absorption within the small intestine

Answer 1

Large

Question 2

Which describes a catabolic pathway?
A. A pathway that consumes energy
B. A pathway that transmits a signal within a cell
C. A pathway that constructs molecules into smaller subunits
D. A pathway that breaks molecules into smaller subunits

Answer 2

D

Question 3

T or F
Glycolysis is an aerobic process

Answer 3

Redo

Question 4

T or F
Major reactants of glycolysis include glucose, NAD+, ADP, and Pi

Answer 4

True

Question 5

T or F
Acetyl CoA, ATP, and NADH are the major products of glycolysis

Answer 5

False

Question 6

T or F
Glycolysis occurs in the cytoplasm of the cell

Answer 6

True

Question 7

T or F
Glycolysis is the process by which glucose is converted to acetyl CoA

Answer 7

False

Question 8

What are the products of ATP+glucose?

Answer 8

—> glucose-6-phosphate + ADP

Question 9

Which step of glycolysis?
Glucose is phosphorylated by hexokinase

Answer 9

1

Question 10

Which step of glycolysis?
Fructose-6-phosphate is phosphorylated to phosphofructokinase

Answer 10

2

Question 11

Which step of glycolysis?
Aldose cleaves the six-carbon sugar in two three-carbon sugars

Answer 11

3

Question 12

Which step of glycolysis?
Glyceraldhyde-3- phosphate is converted to 1,3
-bisphosphoglycerate

Answer 12

4

Question 13

Which step of glycolysis?
3-phosphoglycerate is formed

Answer 13

5

Question 14

Which step of glycolysis?
Phosphoenolpyruvate is converted to pyruvate

Answer 14

6

Question 15

How many steps are there in glycolysis and which step is an oxidation reduction reaction?

Answer 15

10
6 is oxidation reduction

Question 16

Why does the passage of one glucose molecule through glycolysis have a payoff of only two ATP molecules?

Answer 16

2 ATP molecules used in initial phase of glycolysis so only get net gain of 2 ATP at the end

Question 17

Glucose-6-phosphate is a derivative of what?

Answer 17

Galactose

Question 18

Fructose-6-phosphate is a derivative of what?

Answer 18

Mannose

Question 19

Fermentation occurs in animals because it allows glycolysis to continue under _____ conditions by replenishing NAD+

Answer 19

Anaerobic

Question 20

Glycolysis requires ____ produced from fermentation to produce ATP

Answer 20

NAD+ (in anaerobic state)

Question 21

As glucose levels increase in the bloodstream insulin levels _____

Answer 21

Increase

Question 22

As glucose levels decrease in the bloodstream glucagon levels ____

Answer 22

Increase

Question 23

Insulin stimulates the ____ of glucose levels in blood

Answer 23

Decrease

Question 24

Glucagon stimulated the breakdown of _____ in the _____ causing ____ to be released into the blood

Answer 24

Glycogen
Liver
Glucose

Question 25

Which type of cells release insulin?

Answer 25

Pancreatic beta cells

Question 26

What intermediate in glycolysis and gluconeogenesis is most directly used for glycogenesis?

Answer 26

Glucose-6-phosphate

Question 27

Glycogenesis is favored when there are energy rich cells, _____, ______

Answer 27

High blood glucose
High insulin levels

Question 28

Go back to 21

Question 29

Which steps are irreversible and require a different enzyme in gluconeogenesis than glycolysis?

Answer 29

1,3,10

Question 30

Which pathways are used during intense physical exercise?
A. Glycolysis only
B. Gluconeogenesis
C. Glycolysis and gluconeogenesis

Answer 30

C

Question 31

What is the final product of glycogenolysis and when does it happen?

Answer 31

Glucose-6-phosphate
Happens when brain and muscle cells need immediate energy

Question 32

UDP is involved in _____

Answer 32

Glycogenesis

Question 33

NADH is consumed in_____

Answer 33

Gluconeogenesis

Question 34

Go back to 26