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MBC 201 CBT PRACTICE TEST

Phil

February 9, 2024

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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MBC 201

1 / 40

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

A. Acetyl coA

B. NADH

C. FADH2

D. All the options

2 / 40

2. Thiolytic cleavage of β-ketoderivative by an incoming CoA to yield acetyl CoA is catalyzed by;

A. Thiolase

B. Acyl CoA dehydrogenase

C. Enoyl CoA hydratase

D. β-hydroxyacyl CoA dehydrogenase

3 / 40

3. Which of the following membrane lipids have a direct glycosidic linkage between the head-group sugar and the backbone glycerol?

A. Glycolipids

B. Sphingolipids

C. Ether lipids

D. Phospholipids

4 / 40

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

A. Isoglucokinase

B. Hexokinase

C. Phosphofructokiase

D. Phospho glucose isomerase

5 / 40

5. Proteolytic enzymes in pancreatic juice include all but:

A. Trypsonogen

B. Chymotripsinogens

C. Pepsinogen

D. Pro-carboxypeptidase

6 / 40

6. Which of the following hormone is responsible for the activation of phospholipase C?

A. Adrenaline

B. Serotonin

C. Cortisol

D. Vasopressin

7 / 40

7. Which of the following involves carrying genetic information from DNA for protein synthesis?

A. r-RNA

B. t-RNA

C. sn-RNA

D. m-RNA

8 / 40

8. Splitting of 1,3 Diphosphoglycerate is catalyzed by;

A. Phosphoglycerate kinase

B. Triose phosphate isomerise

C. Aldolase

D. None of the options

9 / 40

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

A. Glycolipids

B. Glycoproteins

C. Proteoglycans

D. Glycosaminoglycans

10 / 40

10. Which of the following enzyme catalyzes a reaction that introduces reduced nitrogen ito cellular metabolism?

A. Bacterial glutamine synthase

B. Phosphatase

C. Bacterial denitrogenate oxidase

D. Bacterial denitrogenate reductase

11 / 40

11. Which of the following proteins does not function in cell-cell interaction?

A. Cytochrome c

B. Cadherin

C. Integrin

D. N-CAM

12 / 40

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

A. Three

B. Four

C. Five

D. Two

13 / 40

13. Which of the following is true about tm?

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

B. It can be termed as renaturation temperature

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

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

14 / 40

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

A. Myelin sheath

B. Cell wall

C. Plasma membrane

D. Inner mitochondrial membrane of the hepatocyte

15 / 40

15. 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. Many antibodies are produced

B. Antibody produced has a greater affinity for the antigen

C. Antibody is generated without T-cell help

D. Antibody is generated fast

16 / 40

16. Which of the following is not correct about phosphorylation by IRS on serine residue?

A. It is molecular mechanism for insulin resistance

B. Target tissues fail to respond to circulating insulin

C. It increases insulin levels

D. It is an inhibitory phosphorylation

17 / 40

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

A. 6

B. 7

C. 4

D. 5

18 / 40

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

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

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

C. Free carnitine remains in the mitochondrial matrix

D. Carnitine acyl transferase 1 facilitates synthesis of Acyl carnitine

19 / 40

19. The relationship between oxygen concentration and the fraction of binding sites occupied in myoglobin can best be described as ________

A. Hyperbolic

B. Linear with a negative slope

C. Parabolic

D. Linear with a positive slope

20 / 40

20. Which of the following is an example of epimers?

A. Galactose & Mannose

B. Glucose & Ribose

C. Mannose & Glucose

D. Glucose & Galactose

21 / 40

21. Which of the following makes water a liquid at room temperature?

A. Van der Waals forces of attraction

B. Hydrogen bonds between water molecules

C. Noncovalent interactions

D. Covalent bonding

22 / 40

22. Which is a ketose sugar isomer?

A. Fructose 1,6-biphosphate

B. Dihydroxyacetone phosphate

C. Glyceraldehydes 3-phosphate

D. None of the options

23 / 40

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

A. Nature of solvent

B. Temperature

C. Concentration

D. Current

24 / 40

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

A. HNO3 + NaOH

B. H2 SO4 + KOH

C. NH4OH (excess) + HCl

D. CH3 COOH + NaOH(excess)

25 / 40

25. Which is an aldose sugar?

A. Dihydroxyacetone phosphate

B. Fructose 1,6-biphosphate

C. All the options

D. Glyceraldehydes 3-phosphate

26 / 40

26. ATP contains ----- molecules of phosphates

A. 3

B. 5

C. 2

D. 4

27 / 40

27. In which of the following, glucose residues are linked by β1 &arr; 4 glycosidic bonds?

A. Starch

B. Amylose

C. Cellulose

D. Glycogen

28 / 40

28. Which of the following is termed as conserved gene order?

A. Ortholog

B. Microarray

C. Paralog

D. Synteny

29 / 40

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

A. Serine

B. Glycine

C. Alanine

D. Tryptophan

30 / 40

30. Disorders of fatty acid oxidation include;

A. Ketoacidosis

B. All the options

C. Carnitine deficiency

D. Carnitine deficiency

31 / 40

31. 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

32 / 40

32. Which of the following involves carrying genetic information from DNA for protein synthesis?

A. r-RNA

B. m-RNA

C. t-RNA

D. sn-RNA

33 / 40

33. The pro-enzyme, trypsinogen in converted to active trypsin by _______,

A. Elastase

B. Arginine

C. Enteropeptidase

D. Oligopeptides

34 / 40

34. Which is not true about acetone?

A. It is volatile and thus detectable in the breath

B. It is not produced under normal conditions

C. Acetone productions can lethal levels in severe diabetic ketoacidosis

D. It is a product of slow, spontaneous nonenzymatic decarboxylation of some aceto-acetate

35 / 40

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

A. Liver

B. Brain

C. Skeletal muscles

D. Kidneys

36 / 40

36. Which of these is an allosteric enzyme?

A. Phospho glucose isomerise

B. Hexokinase

C. Phosphofructokinase

D. Fructose 6-phosphate

37 / 40

37. Which of the following statements is correct about column chromatography?

A. Mobile phase is a porous solid material kept in the column with appropriate chemical characteristics

B. Resolution improves as column length increases

C. Large proteins exit the column faster than tiny proteins

D. Mobile phase is a porous solid material kept in the column with appropriate chemical characteristics

38 / 40

38. Which of the following catalyzes the reversible degradation of 2-phosphoglycerate to phosphoenolpyruvate?

A. Enolase

B. Chymotrypsin

C. Hexokinase

D. Trypsin

39 / 40

39. This is not an essential amino acid.

A. Tryptophan

B. Glycine

C. Valine

D. Phenylalanine

40 / 40

40. 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. Saponification number

B. Acid number

C. Polenske number

D. Iodine number

Your score is

The average score is 27%

MBC 201 CBT PRACTICE TEST

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