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MBC 201 CBT PRACTICE TEST

Phil

February 9, 2024

114

Take your time to read instructions before taking this test.

There are 40 questions which you are to answer in 15 minutes that gives you roughly 30 seconds per question.

If you can get at least 60%, you can be rest assured that you’ll ace MBC 201 exam

In a normal exam you will be asked between 40 – 60 questions but I only arranged 40 questions

Note

Do not be in a hurry to answer the questions

Do not waste time on a question you don’t know

Move as fast as possible and starting with questions that don’t have calculation first to save time

Always crosscheck

Don’t be in a hurry to submit, you are not in a competition

Don’t be scared. Getting an A is easy

Don’t be over confident, you can end up a D, E or F. Calm your blood, no be only you sabi book

Please do well to use our comment box incase there’s a message you want to pass to us

70 – 100 A

60 – 69 B

50 – 59 C

45 – 49 D

40 – 44 E

0 – 39 F

I wish you success

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Created on February 09, 2024 By

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MBC 201

1 / 40

1. Glyceraldehyde 3-phosphate contains ------- carbon units

A. 5

B. 4

C. 3

D. 6

2 / 40

2. Disorders of fatty acid oxidation include;

A. Ketoacidosis

B. Carnitine deficiency

C. Carnitine deficiency

D. All the options

3 / 40

3. The degree of ionization does not depend on which of the following parameter?

A. Temperature

B. Current

C. Concentration

D. Nature of solvent

4 / 40

4. The number of milligrams of KOH required to neutralize the free and combined fatty acid in one gram of a given fat is called __________

A. Iodine number

B. Saponification number

C. Acid number

D. Polenske number

5 / 40

5. Which of the following membranes contain low cholesterol and high cardiolipin?

A. Plasma membrane

B. Myelin sheath

C. Cell wall

D. Inner mitochondrial membrane of the hepatocyte

6 / 40

6. During prolonged fasting, the body source its major metabolic fuel through which of the following metabolic events;

A. Hepatic conversion of acetyl coA from FA oxidation

B. Hepatic and skeletal muscle glycogenesis

C. Amino acid breakdown to ketone bodies

D. Hepatic gluconeogenesis

7 / 40

7. Which of the following is a intracellular second messengers?

A. IP3

B. Acetylcholine

C. Glutamate

D. Glycine

8 / 40

8. Proteolytic enzymes in pancreatic juice include all but:

A. Pepsinogen

B. Pro-carboxypeptidase

C. Chymotripsinogens

D. Trypsonogen

9 / 40

9. The breakdown of one molecule of Glucose will yield ------ molecules of pyruvate

A. Five

B. Four

C. Three

D. Two

10 / 40

10. When compared to the first immune response to the same antigen, which of the following is not a hallmark of the secondary immune response?

A. Antibody produced has a greater affinity for the antigen

B. Antibody is generated without T-cell help

C. Antibody is generated fast

D. Many antibodies are produced

11 / 40

11. Who deduced the double-helical structure of DNA?

A. Frederick Sanger

B. Mendel

C. Watson and Francis Crick

D. Anton van Leeuwenhoek

12 / 40

12. Which of the following is abundantly found in collagen?

A. Alanine

B. Tryptophan

C. Glycine

D. Serine

13 / 40

13. Which of the following is true about the Z-DNA helix?

A. It tends to be found at the 3’ end of the genes

B. It has alternating GC sequences

C. It is a permanent conformation of DNA

D. It has fewer base pairs per turn than B-DNA

14 / 40

14. Which is true about ketone bodies?

A. They are water-soluble

B. They are synthesized during prolonged fasting

C. They are products of fatty acid and amino acid catabolism

D. All the options

15 / 40

15. The first step of the first stage of Glycolysis, phosporylation of glucose is catalyzed by which enzyme?

A. Isoglucokinase

B. Phospho glucose isomerase

C. Phosphofructokiase

D. Hexokinase

16 / 40

16. Conversion of glyceraldehydes 3-phosphate to 1,3 - diphosphoglycerate, catalysed by

A. Triose phosphate isomerise

B. Aldolase

C. None of the options

D. Glyceraldehyde 3-phosphate dehydrogenase

17 / 40

17. Which of the following is true about tm?

A. It can be termed as renaturation temperature

B. The higher the content of A = T base pairs, the higher the tm

C. The higher the content of G ≡ C base pairs, the higher the tm

D. The higher the content of G ≡ C base pairs, the lower the tm

18 / 40

18. Which of the following are important for white blood cell recognition?

A. Proteoglycans

B. Glycoproteins

C. Glycosaminoglycans

D. Glycolipids

19 / 40

19. Splitting of Fructose 1, 6 biphosphate yields ----- molecules of glyceraldehyde 3- phosphate

A. 5

B. 4

C. 2

D. 3

20 / 40

20. The first stage of the glycolytic pathway has______ chemical reaction steps

A. 3

B. 7

C. 10

D. 4

21 / 40

21. Which of the following mixture in aqueous solution of equimolar concentration acts as a buffer solution?

A. CH3 COOH + NaOH(excess)

B. NH4OH (excess) + HCl

C. HNO3 + NaOH

D. H2 SO4 + KOH

22 / 40

22. Which of these is an allosteric enzyme?

A. Phospho glucose isomerise

B. Phosphofructokinase

C. Hexokinase

D. Fructose 6-phosphate

23 / 40

23. Oxidative phosphorylation of fatty acids in the TCA cycle requires which of the following;

A. NADH

B. FADH2

C. Acetyl coA

D. All the options

24 / 40

24. Which is an aldose sugar?

A. Glyceraldehydes 3-phosphate

B. Fructose 1,6-biphosphate

C. All the options

D. Dihydroxyacetone phosphate

25 / 40

25. Ketones are excellent fuels for many non hepatic tissues including;

A. Brain

B. All the options

C. Skeletal muscle

D. Cardiac muscle

26 / 40

26. The second stage of Glycolysis consists of ------ chemical reaction steps

A. 7

B. 6

C. 4

D. 5

27 / 40

27. Which of the following is a 39-residue hormone of the anterior pituitary gland?

A. Insulin

B. Glucagon

C. Bradykinin

D. Corticotropin

28 / 40

28. Which of the following is true about phosphodiester linkage?

A. 5’-phosphate group of one nucleotide unit is joined to the 3’-hydroxyl group of the next nucleotide

B. 3’-phosphate group of one nucleotide unit is joined to the 3’-hydroxyl group of the next nucleotide

C. 3’-phosphate group of one nucleotide unit is joined to the 5’-hydroxyl group of the next nucleotide

D. 5’-phosphate group of one nucleotide unit is joined to the 5’-hydroxyl group of the next nucleotide

29 / 40

29. The digestive enzyme that completes digestion of small peptides within the intestinal mucosal cells is ______,

A. Arginine

B. Enteropeptidase

C. Aminopeptidase

D. Oligopeptides

30 / 40

30. The final step of production of pyruvate is catalyzed by;

A. Pyruvate kinase

B. None of the options

C. Enolase

D. 2-phosphoglyceromutase

31 / 40

31. When the velocity of enzyme activity is plotted against substrate concentration, which of the following is obtained?

A. Straight line with negative slope

B. Straight line with positive slope

C. Parabola

D. Hyperbolic curve

32 / 40

32. Splitting of Fructose 1, 6 biphosphate is catalyzed by;

A. Phosphofructokinase

B. Aldolase

C. Triose phosphate isomerise

D. Hexokinase

33 / 40

33. All but one is true about the carnitine fatty acyl carrier system

A. Mitochondrial Carnitine acyl transferase II re-synthesizes fatty acyl CoA

B. Carninitine acyl translocase transports acyl carnitine across the inner mitochondrial membrane into the matrix

C. Carnitine acyl transferase 1 facilitates synthesis of Acyl carnitine

D. Free carnitine remains in the mitochondrial matrix

34 / 40

34. The process of β-oxidation of fatty acids includes all but one of the process

A. None of the options

B. Oxidation of the β-hydroxy derivative

C. Oxidation of fatty acyl CoA

D. Hydration of the unsaturated fatty acyl CoA

35 / 40

35. Which of the following is a function of chaperone protein?

A. It degrades proteins that have folded improperly

B. It degrades proteins that have folded properly

C. It rescues proteins that have folded improperly and allowed them to refold properly

D. provides a template for how the proteins should fold

E. It degrades proteins that have folded improperly

36 / 40

36. Mobilization of free fatty acids from fat stores is herald by all these mechanisms but

A. Activation of intracellular second messenger cascade

B. None of the options

C. Lipolysis of triglycerides into glycerol and free fatty acids

D. Phosphorylation of hormone sensitive lipase

37 / 40

37. Cellular energy currency is in form of;

A. ADP

B. All the options

C. ATP

D. Phosphates

38 / 40

38. Which is not true about carnitine deficiency?

A. It occurs particularly in the preterm infants

B. It is due to inadequate biosynthesis

C. Symptoms include hypoglycemia, lipid accumulation and muscular weakness

D. It is not treatable

39 / 40

39. The key enzymes for utilization of ketone bodies is found in these tissues except;

A. Liver

B. Kidneys

C. Brain

D. Skeletal muscles

40 / 40

40. The heat of vaporization of water is ________

A. 1060 J/g

B. 2060 kJ/g

C. 1260 kJ/g

D. 2260 J/g

Your score is

The average score is 27%

MBC 201 CBT PRACTICE TEST

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