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BCH 201 CBT PRACTICE TEST

Phil

March 23, 2023

153

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 BCH 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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BCH 201

1 / 40

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

A. Amino acid breakdown to ketone bodies

B. Hepatic conversion of acetyl coA from FA oxidation

C. Hepatic gluconeogenesis

D. Hepatic and skeletal muscle glycogenesis

2 / 40

2. Which of the following is true about tm?

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

3 / 40

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

A. Parabolic

B. Linear with a positive slope

C. Linear with a negative slope

D. Hyperbolic

4 / 40

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

A. Phosphofructokiase

B. Phospho glucose isomerase

C. Hexokinase

D. Isoglucokinase

5 / 40

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

A. Myelin sheath

B. Inner mitochondrial membrane of the hepatocyte

C. Cell wall

D. Plasma membrane

6 / 40

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

A. Noncovalent interactions

B. Covalent bonding

C. Van der Waals forces of attraction

D. Hydrogen bonds between water molecules

7 / 40

7. Which of these is an allosteric enzyme?

A. Hexokinase

B. Fructose 6-phosphate

C. Phospho glucose isomerise

D. Phosphofructokinase

8 / 40

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

A. Integrin

B. Cytochrome c

C. Cadherin

D. N-CAM

9 / 40

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

A. Nature of solvent

B. Concentration

C. Temperature

D. Current

10 / 40

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

A. Proteoglycans

B. Glycosaminoglycans

C. Glycoproteins

D. Glycolipids

11 / 40

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

A. Adrenaline

B. Cortisol

C. Serotonin

D. Vasopressin

12 / 40

12. Which of the following enzyme is used in PCR?

A. EcoRII

B. Taq DNA polymerase

C. EcoRI

D. HRP

13 / 40

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

A. t-RNA

B. m-RNA

C. r-RNA

D. sn-RNA

14 / 40

14. Non pathologic forms of ketosis are due to;

A. Diabetic ketoacidosis

B. Jamaican Vomiting sickness

C. Refsum's disease

D. The post absorptive phase of severe exercise

15 / 40

15. Which is not true about cellular fatty acid metabolism?

A. Free fatty acids travels through the blood stream bound to serum albumin

B. Fatty acid oxidation occurs in the mitochondrial matrix

C. None of the options

D. Fatty acid activation occurs in the cytosol as fatty acyl CoAs

16 / 40

16. The reactions in the first stage of the glycolytic pathway comprises of which of the following?

A. Decarboxylation

B. Isomerization

C. Decarboxylation

D. Dehydrogenation

17 / 40

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

A. Phosphoglycerate kinase

B. Aldolase

C. Triose phosphate isomerise

D. None of the options

18 / 40

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

A. Hexokinase

B. Enolase

C. Trypsin

D. Chymotrypsin

19 / 40

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

A. Free carnitine remains in the mitochondrial matrix

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

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

D. Carnitine acyl transferase 1 facilitates synthesis of Acyl carnitine

20 / 40

20. Based on which of the following enzymes Hydrolysis reactions are catalyzed?

A. Ligase

B. Somerase

C. Oxidoreductase

D. Hydrolase

21 / 40

21. Which is not true about acetone?

A. It is volatile and thus detectable in the breath

B. Acetone productions can lethal levels in severe diabetic ketoacidosis

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

D. It is not produced under normal conditions

22 / 40

22. Which of the following temperature best suits the growth and multiplication of transformed cells?

A. 37°C

B. 30°C

C. 25°C

D. 26°C

23 / 40

23. The first substrate of the second stage of Glycolysis is;

A. Glucose

B. None of the options

C. Fructose 1, 6 biphosphate

D. Fructose 6-phosphate

24 / 40

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

A. Phosphorylation of hormone sensitive lipase

B. None of the options

C. Activation of intracellular second messenger cascade

D. Lipolysis of triglycerides into glycerol and free fatty acids

25 / 40

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

C. Large proteins exit the column faster than tiny proteins

D. Resolution improves as column length increases

26 / 40

26. Which is true about ketone bodies?

A. They are synthesized during prolonged fasting

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

C. They are water-soluble

D. All the options

27 / 40

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

A. Oligopeptides

B. Aminopeptidase

C. Enteropeptidase

D. Arginine

28 / 40

28. Which is not true about carnitine deficiency?

A. Symptoms include hypoglycemia, lipid accumulation and muscular weakness

B. It is not treatable

C. It is due to inadequate biosynthesis

D. It occurs particularly in the preterm infants

29 / 40

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

A. Enolase

B. 2-phosphoglyceromutase

C. Pyruvate kinase

D. None of the options

30 / 40

30. 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 fewer base pairs per turn than B-DNA

C. It is a permanent conformation of DNA

D. It has alternating GC sequences

31 / 40

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

A. Ortholog

B. Microarray

C. Paralog

D. Synteny

32 / 40

32. The enzymes involved in ketogenesis are

A. HMG-coA synthase

B. β-ketothiolase

C. HMGcoA lyase

D. All the options

33 / 40

33. Arrangement of nucleotides in DNA can be seen using which of the following instruments?

A. Light microscope

B. Ultracentrifuge

C. X-Ray crystallography

D. Electron microscope

34 / 40

34. 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. Acid number

B. Iodine number

C. Polenske number

D. Saponification number

35 / 40

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

A. 10

B. 4

C. 3

D. 7

36 / 40

36. The stability of an α-helix is not affected by which of the following?

A. Electrostatic repulsion

B. I nteraction between R groups spaced three residues apart

C. Occurrence of alanine and glycine residues

D. Bulkiness

37 / 40

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

A. Kidneys

B. Skeletal muscles

C. Liver

D. Brain

38 / 40

38. 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 is generated fast

B. Many antibodies are produced

C. Antibody is generated without T-cell help

D. Antibody produced has a greater affinity for the antigen

39 / 40

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

A. t-RNA

B. r-RNA

C. m-RNA

D. sn-RNA

40 / 40

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

A. All the options

B. Skeletal muscle

C. Cardiac muscle

D. Brain

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The average score is 39%

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Booker

1 year ago

Where is the test??

Author

Reply to Booker

I’m just realizing it.Currently working on making it active, please bear with me.

Oladimeji Oluwanifemi Hannah

Where the test dey

Reply to Oladimeji Oluwanifemi Hannah

I’m currently working on bringing the test live. Please bear with me

BCH 201 CBT PRACTICE TEST

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