BCH 201 CBT PRACTICE TEST

Phil March 23, 2023Last Updated: February 9, 2024

4 3,025 1 minute read

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. Which of these is an allosteric enzyme?

A. Phosphofructokinase

B. Fructose 6-phosphate

C. Hexokinase

D. Phospho glucose isomerise

2 / 40

2. 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. 5’-phosphate group of one nucleotide unit is joined to the 5’-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. 3’-phosphate group of one nucleotide unit is joined to the 3’-hydroxyl group of the next nucleotide

3 / 40

3. Recombinant DNA construction involves ____________

A. Cleaving DNA with a restriction endonuclease and joining with polymerase

B. Cleaving DNA with ligase and joining with endonuclease

C. Cleaving and joining DNA with restriction endonuclease

D. Cleaving DNA with a restriction endonuclease and joining with ligase

4 / 40

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

A. Occurrence of alanine and glycine residues

B. Bulkiness

C. Electrostatic repulsion

D. I nteraction between R groups spaced three residues apart

5 / 40

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

A. Fatty acid oxidation occurs in the mitochondrial matrix

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

C. None of the options

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

6 / 40

6. Disorders of fatty acid oxidation include;

A. Ketoacidosis

B. Carnitine deficiency

C. All the options

D. Carnitine deficiency

7 / 40

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

A. Oxidation of the β-hydroxy derivative

B. Hydration of the unsaturated fatty acyl CoA

C. None of the options

D. Oxidation of fatty acyl CoA

8 / 40

8. Which of the following is a choline-containing lipid?

A. Phosphatidylglycerol

B. Phosphatidylserine

C. Sphingomyelin

D. Phosphatidylethanolamine

9 / 40

9. 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

10 / 40

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

A. Nature of solvent

B. Current

C. Temperature

D. Concentration

11 / 40

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

A. Arginine

B. Elastase

C. Oligopeptides

D. Enteropeptidase

12 / 40

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

A. Phosphatase

B. Bacterial denitrogenate reductase

C. Bacterial glutamine synthase

D. Bacterial denitrogenate oxidase

13 / 40

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

A. sn-RNA

B. t-RNA

C. m-RNA

D. r-RNA

14 / 40

14. 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 gluconeogenesis

C. Amino acid breakdown to ketone bodies

D. Hepatic and skeletal muscle glycogenesis

15 / 40

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

A. Target tissues fail to respond to circulating insulin

B. It is molecular mechanism for insulin resistance

C. It increases insulin levels

D. It is an inhibitory phosphorylation

16 / 40

16. Non pathologic forms of ketosis are due to;

A. Refsum's disease

B. Jamaican Vomiting sickness

C. The post absorptive phase of severe exercise

D. Diabetic ketoacidosis

17 / 40

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

A. Isomerization

B. Decarboxylation

C. Decarboxylation

D. Dehydrogenation

18 / 40

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

A. Brain

B. Skeletal muscle

C. Cardiac muscle

D. All the options

19 / 40

19. Which is not true about carnitine deficiency?

A. It is not treatable

B. Symptoms include hypoglycemia, lipid accumulation and muscular weakness

C. It occurs particularly in the preterm infants

D. It is due to inadequate biosynthesis

20 / 40

20. This is not an essential amino acid.

A. Phenylalanine

B. Glycine

C. Valine

D. Tryptophan

21 / 40

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

A. Isoglucokinase

B. Phospho glucose isomerase

C. Hexokinase

D. Phosphofructokiase

22 / 40

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

A. Integrin

B. Cadherin

C. N-CAM

D. Cytochrome c

23 / 40

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

A. β-hydroxyacyl CoA dehydrogenase

B. Thiolase

C. Enoyl CoA hydratase

D. Acyl CoA dehydrogenase

24 / 40

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

A. It is a permanent conformation of DNA

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

C. It has alternating GC sequences

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

25 / 40

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

A. Covalent bonding

B. Hydrogen bonds between water molecules

C. Noncovalent interactions

D. Van der Waals forces of attraction

26 / 40

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

A. None of the options

B. Glyceraldehyde 3-phosphate dehydrogenase

C. Aldolase

D. Triose phosphate isomerise

27 / 40

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

A. None of the options

B. Phosphoglycerate kinase

C. Triose phosphate isomerise

D. Aldolase

28 / 40

28. The enzymes involved in ketogenesis are

A. β-ketothiolase

B. All the options

C. HMG-coA synthase

D. HMGcoA lyase

29 / 40

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

A. EcoRII

B. HRP

C. EcoRI

D. Taq DNA polymerase

30 / 40

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

A. Light microscope

B. X-Ray crystallography

C. Electron microscope

D. Ultracentrifuge

31 / 40

31. Utilization of fatty acids for energy production is absent in which of these tissues

A. Red blood cells

B. Skeletal muscle

C. Brain

D. Cardiac muscle

32 / 40

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

A. Paralog

B. Microarray

C. Synteny

D. Ortholog

33 / 40

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

A. 4

B. 7

C. 5

D. 6

34 / 40

34. Cellular energy currency is in form of;

A. Phosphates

B. ADP

C. All the options

D. ATP

35 / 40

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

A. Hyperbolic curve

B. Parabola

C. Straight line with negative slope

D. Straight line with positive slope

36 / 40

36. Meristem culture helps in developing which of the following?

A. Virus free plants

B. Hybrid plants

C. Disease resistant plants

D. Tall plants

37 / 40

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

A. Sphingolipids

B. Glycolipids

C. Phospholipids

D. Ether lipids

38 / 40

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

A. Hexokinase

B. Chymotrypsin

C. Enolase

D. Trypsin

39 / 40

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

A. Glycolipids

B. Glycosaminoglycans

C. Glycoproteins

D. Proteoglycans

40 / 40

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

A. Glucose & Ribose

B. Mannose & Glucose

C. Galactose & Mannose

D. Glucose & Galactose

Your score is

The average score is 41%

Phil March 23, 2023Last Updated: February 9, 2024

4 3,025 1 minute read

0 0 votes

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Booker

11 months ago

Where is the test??

Author

Phil

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

Michael
Adon die...
Onyinyechi
The questions are hard o...
Phil
Noted...
Baaki Moshood
Please try and make the Question more And from that it incre...
Phil
You're putting too much pressure on yourself, you can do bet...

BCH 201 CBT PRACTICE TEST

Phil

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