III. Keys

PRACTICAL LESSON 1

GENERAL METABOLISM. INTERMEDIARY METABOLISM

1.A.

2.C.

3.D.

4.A.

5.B.

6.A.

7.C.

8.D.

9.D.

10.D

PRACTICAL LESSON 2

BIOLOGICAL OXIDATION. ELECTRON TRANSPORT CHAIN. BOENERGETICS AND OXYDATIVE PHOSPHORILATION

1. B.

2. D. Thirteen of the approximately 100 polypeptides required for oxidative phosphorylation are coded for by mitochondrial DNA, including the electron transport components cytochrome c and coenzyme Q. Oxygen directly oxidizes cytochrome oxidase. Malat dehydrogenase directly reduces FAD. Cyanide inhibits electron flow, proton pumping and ATP synthesis.

3.D

4.D.

5.E.

6.D

7.B

8.E

9.E

10.C

PRACTICAL LESSON 3

FREE RADICALS AND ANTI-OXIDANTS. VITAMINS AS ANTIOXIDANTS

1. B

2. C

3.B

4.E

5.C

6.B

7.D

8.D

9. E

10. A

PRACTICAL LESSON 4

OXIDATIVE DECARBOXYLATION OF PIRUVIC ACID. KREBS CYCLE

1.D

2. E

3. E

4.B

5.A

6.E

7.D

8.D

9.C

10. B

QUESTIONS FOR TEST CONTROL MODULE 3

PRACTICAL LESSON 1

CARBOHYDRATES: BIOLOGICAL FUNCTIONS AND CLASSIFICATION. METABOLIC PATHWAY OF CARBOHYDRATES.

GLYCOGEN METABOLISM

Choose the correct answer:

11. Which one of the following pairs is incorrect?

Substrate	Products of hydrolysis
A. Maltose	Glucose+ glucose
B. Isomaltose	Glucose+ glucose
C. Sucrose	Glucose+ fructose
D. Lactose	Glucose+ galactose
E. Starch	Glucose+ glucose

12. Which one of the following pairs is incorrect?

Enzyme	Substrate
A. α-amylase	Maltose
B Maltase	Maltose
C. Isomaltase	Isomaltose
D. Lactase	Lactose
E. Sucrase	Sucrose

13. Which one of the following pairs is incorrect?

Enzyme	The bond, which is broken by enzyme
A. α-amylase	α- 1.4 glycosidic bond
B Maltase	α- 1.4 glycosidic bond
C. Isomaltase	α- 1.4 glycosidic bond
D. Lactase	β- 1.4 glycosidic bond
E. Sucrase	α- 1.2 glycosidic bond

4. What the statement concerning the saliva α- amylase is incorrect?

A. It is the hydrolase;

B. It is the α- 1.4. endoglycosidase;

C. It has pH opt 6.8-7.2;

D. It converts starch to dextrines;

E. It converts starch to maltose.

5. Foodstuffs containing the high level of the carbohydrates are following instead….

A. potato and bread;

B. meal;

C. sweet fruits and vegetables;

D. honey;

E. eggs.

6. Hormones increasing the level of glucose in the blood are following…. Choose the one incorrect answer.

A. glucagon;

B. adrenaline;

C. insulin;

D. cortisol;

E. thyroxin.

7. Hormone decreasing the level of glucose in the blood is….

A. glucagon;

B. adrenaline;

C. insulin;

D. cortisol;

E. thyroxin.

8. Key enzyme of glycogenesis is…

A. α- amylase;

B. maltase;

C. hexokinase;

D. glycogen synthase;

E. glycogen phosphorylase.

9. Key enzyme of glycogenolysis is…

A. α- amylase;

B. maltase;

C. hexokinase;

D. glycogen synthase;

E. glycogen phosphorylase.

10. The mechanism of regulation key enzymes of glycogenesis and glycogenolysis is…

A. partial proteolysis;

B. competitive inhibition;

C. covalent modification;

D. noncompetitive inhibition;

E. allosteric inhibition.