Biochemistry mcq

1. The following substance is used to reduce raised intracranial pressure

b. dulcitol

a. sorbitol

c. ribitol

d. mannitol

2. Galactosyltransferase is a marker enzyme of

b. Mitochondria

c. Lysosomes

d. Golgi complex

a. Cell membrane

3. The nitrogenous base present in Lecithin is

a. Choline

b. Ethanolamine

c. Serine

d. Sphingosine

4. A ganglioside on hydrolysis gives all the following except -

a. Fatty acid

b. Glycerol

c. N-acetylneuramic acid

d. Sphingosine

5. Which enzyme is used in the treatment of leukemia

a. Glucose-6-P dehydrogenase

b. Asparginase

c. Luciferase

d. Lipase

6. Decreased activity of Ceruloplasmin is seen in

a. Muscular dystrophy

b. Alzheimer's disease

c. Wilson's disease

d. Paget's disease

7. Folic acid is inhibited by

a. Isoniazid (INH)

b. Dicumarol

c. Avidin

d. Methotrexate

8. The following is considered to be twenty first amino acids

a. hydroxy-proline

b. Hydroxy lysine

c. Methyl lysine

d. seleno cystein

9. Respiratory distress syndrome in premature infants is due to the deficiency of

a. Plasmalogen

b. dipalmitoyl lecithin

c. cardiolipin

d. cephalin

10. Accumulation of the following compound is responsible for the neurological manifestations observed in vitamin B12 deficiency

a. Succinyl CoA

c. Acetyl CoA

b. Propionyl CoA

d. Methyl malonyl CoA

Answer these mcq questions 

Sure, here are the answers to the multiple-choice questions:

The substance used to reduce raised intracranial pressure is d. mannitol.

Galactosyltransferase is a marker enzyme of d. Golgi complex.

The nitrogenous base present in Lecithin is a. Choline.

On hydrolysis, a ganglioside gives all the following except b. Glycerol.

The enzyme used in the treatment of leukemia is b. Asparginase.

Decreased activity of Ceruloplasmin is seen in c. Wilson's disease.

Folic acid is inhibited by d. Methotrexate.

The twenty-first amino acid is considered to be d. seleno cysteine.

Respiratory distress syndrome in premature infants is due to the deficiency of b. dipalmitoyl lecithin.

Neurological manifestations observed in vitamin B12 deficiency are due to the accumulation of d. Methyl malonyl

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11. Laboratory measurement of the following enzyme RBC is used to assess riboflavin deficiency

a. Glutathione reductase

b. Superoxide dismutase

c. pyruvate dehydrogenase

d. Xanthine oxidase

12. All the following statements about a live attenuated vaccine are true, expect

a. A single dose is sufficient

b. It induces shorter but effective immunity

c. It induces humoral & cell mediated immunity

d. It can be administered by the route of natural infection to induce local immunity

13. In which of the following conditions the level of creatine kinase-BB increases.

a. Myocardial Ischemia

b. Brain Ischemia

c. kidney damage

d. Electrical cardioversion

14. One of the main function of Vitamin K is cofactor for

a. Carboxylate for the formation of y carboxyglutamate

b. Methylation of S-adenosyl methionine

c. Carboxylation of biotin

d. One carbon transfer by tetrahydrofolate

15. Creutzfeldt-Jakob diseases is due to mutation causing the misfolding of

a. ẞ Amyloid protein

b. Prion protein

c. Muscle protein

d. None of the above

16. The following components are part of colorimeter, Expect

a. Light source

b. Filter

c. Wavelength selector

d. Detector

17. Suicidal enzyme is

a. Lipoxygenase

b. Cyclo-oxygenase

c. Thromoboxane synthase

d. 5- nucleotidase

18. Arachidonic acid is formed from

a. Stearic acid

b. Palmitic acid

c. Linoleic acid

d. Oleic acid

19. Glucogenic amino acid are that

a. Which contain glucose in its structure

b. Acts as precursors for carbohydrates biosynthesis c. On biological oxidation it gives energy equal to glucose

d. All of the above

b. Agar

20. The polysaccharide used in assessing the glomerular futration rate (GFR) is

a. Glycogen

c. Inulin

d. Hyaluronic acid

Give answer of these mcq in sequence 

1. a. Glutathione reductase
2. b. It induces shorter but effective immunity
3. b. Brain Ischemia
4. a. Carboxylate for the formation of y carboxyglutamate
5. b. Prion protein
6. d. Detector
7. c. Thromboxane synthase
8. c. Linoleic acid
9. b. Acts as precursors for carbohydrates biosyn
10. c. Inulin

a. What are lysosomes, name the class of enzymes belong to lysosomes.

b. What are functions of Fes protein in ETC?

c. Give any four example of metalloenzyme?

d. What is clinical significance of CRP?

e. What are nucleic acid analogs. Give two examples?

f.. What is complete protein? Mention one example.

g. Write any four function of phospholipid?

h. Give any four biochemical importance of pentose.

i. What is tautomerization, why sugar in alkaline solution act as powerful reducing agents?

j. What is ATP- ADP cycle?

k. Name the protein misfolding diseases?

a. Lysosomes are membrane-bound organelles containing digestive enzymes. The enzymes within lysosomes belong to the class of hydrolases.

b. The Fes protein, a part of the electron transport chain (ETC), functions as a flavoprotein that catalyzes electron transfer reactions, specifically in the conversion of succinate to fumarate.

c. Examples of metalloenzymes include carbonic anhydrase, superoxide dismutase, zinc finger proteins, and cytochrome c oxidase.

d. C-reactive protein (CRP) is a marker of inflammation and its levels rise in response to inflammation or tissue damage, making it clinically significant in diagnosing infections or monitoring certain diseases.

e. Nucleic acid analogs are synthetic compounds that mimic the structure of nucleotides. Examples include AZT (azidothymidine) and 5-FU (5-fluorouracil).

f. A complete protein contains all essential amino acids in sufficient quantities. An example of a complete protein is quinoa.

g. Functions of phospholipids include forming cell membranes, regulating cellular processes, serving as signaling molecules, and contributing to the structure of lipoproteins.

h. Biochemically, pentoses serve as constituents of nucleic acids, they participate in energy metabolism, act as components of coenzymes (e.g., NADP+), and contribute to the structure of important biomolecules.

i. Tautomerization refers to the rearrangement of atoms within a molecule to form structural isomers. Sugars in alkaline solutions act as powerful reducing agents due to the formation of enediols during tautomerization.

j. The ATP-ADP cycle involves the conversion of adenosine triphosphate (ATP) to adenosine diphosphate (ADP) and vice versa, playing a crucial role in cellular energy metabolism.

k. Protein misfolding diseases include Alzheimer's disease, Parkinson's disease, Huntington's disease, and Creutzfeldt-Jakob disease.