MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Apo B48 and apo B100 are expressed as two different apo-proteins because of difference in: |
| A. | Chromosomal loci |
| B. | Apo-B gene |
| C. | RNA editing |
| D. | RNA splicing |
| Answer» D. RNA splicing | |
| 2. |
Which of the following is not a phase I Reaction: |
| A. | Hydrolysis |
| B. | Conjugation |
| C. | Oxidation |
| D. | Reduction |
| Answer» C. Oxidation | |
| 3. |
In TCA cycle of tricarboxylic acid,which is first formed |
| A. | Succinate |
| B. | Fumarate |
| C. | Citrate |
| D. | Isocitrate |
| Answer» D. Isocitrate | |
| 4. |
Urea is formed from which substrate ? |
| A. | Arginine |
| B. | Orginine |
| C. | Citrulline |
| D. | Aspartate |
| Answer» E. | |
| 5. |
Correct order of switching of Ig - |
| A. | IgM to IgG |
| B. | IgA to IgG |
| C. | IgM to IgD |
| D. | All of the above |
| Answer» B. IgA to IgG | |
| 6. |
During phagocytosis,the metabolic process called respiratory burst involves the activation of: |
| A. | Peroxidase |
| B. | Dehydrogenase |
| C. | Oxidase |
| D. | Hydrolase |
| Answer» D. Hydrolase | |
| 7. |
Hormone Substrate concentration affects the velocity of enzymatic action, this is known as - |
| A. | Salkowski reaction |
| B. | Zimmerman reaction |
| C. | Liberman-Burchard reaction |
| D. | Michales Menton reaction |
| Answer» E. | |
| 8. |
Transcription is inhibited by - |
| A. | Actinomycin D |
| B. | Chloramphenicol |
| C. | Streptomycin |
| D. | All of the above |
| Answer» B. Chloramphenicol | |
| 9. |
The substance essential for transfer of fatty acids across mitochondrial membrane - |
| A. | Ceratinine |
| B. | Ceratine |
| C. | Coenzyme A |
| D. | Carnitine |
| Answer» E. | |
| 10. |
Mitochondria gene (True statement) - |
| A. | Paternal transmission |
| B. | Maternally transmission |
| C. | Mendelian inheritance |
| D. | All of the above |
| Answer» C. Mendelian inheritance | |
| 11. |
Bilirubin in conjugation with glucoronic acid conjugation has properties - |
| A. | Able to cross cell membrane |
| B. | Hydrophillic to hydrophobic |
| C. | Lipid soluble |
| D. | All of the above |
| Answer» B. Hydrophillic to hydrophobic | |
| 12. |
Urea cycle enzymes are - |
| A. | Asparginase |
| B. | Glutaminase |
| C. | Glutamate dehydrogenase |
| D. | Ornithine transcaroxylase |
| Answer» E. | |
| 13. |
Addition of PUFA in plasma membrane causes |
| A. | Membrane becomes rigid |
| B. | Increase in fluidity of membrane |
| C. | Decrease in fluidity of membrane |
| D. | No change in fluidity of membrane |
| Answer» C. Decrease in fluidity of membrane | |
| 14. |
Which of the following are X-linked recessive disorders - |
| A. | Neurofibromatosis |
| B. | Duchenne muscular dystrophy |
| C. | Marfan Syndrome |
| D. | Phenylketonuria |
| Answer» C. Marfan Syndrome | |
| 15. |
Conversion of alanine from pyruvate is an example of: |
| A. | Transketolation |
| B. | Transamination |
| C. | Transmethylation |
| D. | Deamination |
| Answer» C. Transmethylation | |
| 16. |
How many calories are supplied per gram of dietary fibre ? |
| A. | 2 calories |
| B. | 0 calories |
| C. | 4 calories |
| D. | 10 calories |
| Answer» B. 0 calories | |
| 17. |
Which statement is incorrect - |
| A. | Phosphorescence: is energy emitted following absorption of EM radiation |
| B. | Electrochemiluminescence: is energy emitted by photon |
| C. | Chemiluminescene: excited electron in higher orbit comes to lower orbit by emitting energy in the form of photon |
| D. | Bioluminescence: is a form of chemiluminescence |
| Answer» C. Chemiluminescene: excited electron in higher orbit comes to lower orbit by emitting energy in the form of photon | |
| 18. |
Which of the following amino acids is most likely to be found in the transmembrane region of a protein - |
| A. | Arginine |
| B. | Lysine |
| C. | Aspartate |
| D. | Leucine |
| Answer» E. | |
| 19. |
Western Blot detects ? |
| A. | RNA |
| B. | DNA |
| C. | mRNA |
| D. | Protein |
| Answer» E. | |
| 20. |
The function of IgD is - |
| A. | Antigen recognition by B cells |
| B. | Localized protection in external secretion |
| C. | Compliment activation |
| D. | Reagin activity |
| Answer» B. Localized protection in external secretion | |
| 21. |
Membrane fluidity is increased by - |
| A. | Stearic acid |
| B. | Palmitic acid |
| C. | Cholesterol |
| D. | Linoleic acid |
| Answer» E. | |
| 22. |
Glyconeogenic capability of cell is determined by the presence of - |
| A. | Pyruvate carboxylase |
| B. | Fructose 1-6 biphosphatase |
| C. | Pyruvate dehydrogenase |
| D. | Glucose-6-phosphate |
| Answer» C. Pyruvate dehydrogenase | |
| 23. |
In TCA cycle of tricarboxylic acid, which is first formed - |
| A. | Citrate |
| B. | Isocitrate |
| C. | Fumarate |
| D. | Succinate |
| Answer» B. Isocitrate | |
| 24. |
Transketolase activity due to: |
| A. | Thiamnine |
| B. | Riboflavin |
| C. | Pyridoxine |
| D. | Vitamin A |
| Answer» B. Riboflavin | |
| 25. |
Ketone body formation without glycosuria seen in - |
| A. | DI |
| B. | DM |
| C. | Obesity |
| D. | Prolonged starvation |
| Answer» E. | |
| 26. |
Euchromatin is the region of DNA that is relatively: |
| A. | Overcondensed |
| B. | Partially condensed |
| C. | Uncondensed |
| D. | Condensed |
| Answer» D. Condensed | |
| 27. |
The two fragments of DNA are separated by - |
| A. | High speed centrifugation |
| B. | Thin layer chromatography |
| C. | Paper chromatography |
| D. | Gel chromatography |
| Answer» E. | |
| 28. |
Which of the following is associated with reduced activity of lipoprotein in lipase: |
| A. | Increased chylomicron and VLDL |
| B. | Increased chylomicron |
| C. | Increased HDL |
| D. | Increased LDL |
| Answer» C. Increased HDL | |
| 29. |
Which form of DNA is seen predominantly - |
| A. | A |
| B. | C |
| C. | B |
| D. | Z |
| Answer» D. Z | |
| 30. |
Iso electric pH is - |
| A. | Point at which pH of ions does not alter |
| B. | Point at which positive and negative charges on the amino acid are equal |
| C. | Point at which all amino acids are Z zwitter ion form |
| D. | Point at which pH of ions are same |
| Answer» C. Point at which all amino acids are Z zwitter ion form | |
| 31. |
In a centrifugal distribution, protein that is precipitated first is - |
| A. | Fibrous |
| B. | Globular |
| C. | Completely disorganized |
| D. | None of the above |
| Answer» B. Globular | |
| 32. |
During the formation of hydroxyproline and hydroxylsine, the essential factors required is/are - |
| A. | Ascorbic acid |
| B. | Pyridoxal phosphate |
| C. | Methycobalamine |
| D. | Thiamine pyrophosphate |
| Answer» B. Pyridoxal phosphate | |
| 33. |
In fatty acid synthesis CO2 loss occurs in which step - |
| A. | Dehydration |
| B. | Hydration |
| C. | Reduction |
| D. | Condensation reaction |
| Answer» E. | |
| 34. |
Uric acid level in urine is elevated in - |
| A. | Tyrosinosis |
| B. | Maple syrup urine disease |
| C. | Nieman picks disease |
| D. | Mucopolysacchroidosis |
| Answer» E. | |
| 35. |
Energy Expenditure in Resting state depends on |
| A. | Resting Heart Rate |
| B. | Exercise |
| C. | Lean Body Mass |
| D. | Adipose tissue |
| Answer» D. Adipose tissue | |
| 36. |
Hemoproteins are - |
| A. | Cytochrome C |
| B. | Cytochrome 450 |
| C. | Myoglobin |
| D. | All of the above |
| Answer» E. | |
| 37. |
Keratin in skin is softer than keratin in nail because keratin in skin has: |
| A. | High sodium Content |
| B. | Different affinity for water |
| C. | Less number of disulphide bonds |
| D. | Less number of salt bridges |
| Answer» D. Less number of salt bridges | |
| 38. |
The enzyme involved in purine metabolism,deficiency of which causes Immunodeficiency,is: |
| A. | HGPRT |
| B. | Xanthine Oxidase |
| C. | PRRP |
| D. | Adenosine deaminase |
| Answer» E. | |
| 39. |
In vitamin C deficiency, post translational modification of which amino acid is defective - |
| A. | Glycine |
| B. | Arginine |
| C. | Lysine |
| D. | Alanine |
| Answer» D. Alanine | |
| 40. |
Thiamine is essential for |
| A. | Isocitrate dehydrogenase |
| B. | Succinate dehydrogenase |
| C. | Pyruvate dehydrogenase |
| D. | Acetyl CoA synthetase |
| Answer» D. Acetyl CoA synthetase | |
| 41. |
Hemoprosthetic group is found in - |
| A. | Tyrosine |
| B. | Cytochrome oxidase |
| C. | Xanthine oxidase |
| D. | All of the above |
| Answer» C. Xanthine oxidase | |
| 42. |
The combination of main supporting enzyme is called - |
| A. | Coenzyme |
| B. | Apoenzyme |
| C. | Constitutive enzyme |
| D. | Holoenzyme |
| Answer» E. | |
| 43. |
Which vitamin is related to a co-factor in glycine Metabolism is - |
| A. | Folic acid |
| B. | V, E |
| C. | Pantothenic acid |
| D. | Thiamine |
| Answer» B. V, E | |
| 44. |
In molecular cloning, Blue white screening is used for - |
| A. | To detect gene mutation |
| B. | To screen for recombinant vectors |
| C. | To detect host DNA in situ |
| D. | To identify desired chromosomal DNA insert in plasmid vectors |
| Answer» E. | |
| 45. |
Internal respiration are - |
| A. | Exergonic and catabolic |
| B. | Exergonic and anabolic |
| C. | Endergonic and catabolic |
| D. | Endergonic and anabolic |
| Answer» B. Exergonic and anabolic | |
| 46. |
All of the following are required for hydroxylation of proline in collagen synthesis except: |
| A. | Dioxygenases |
| B. | Pyridoxal phosphate |
| C. | O2 |
| D. | Vitamin C |
| Answer» C. O2 | |
| 47. |
In G-6PD deficiency patient hemolysis is due to decrease in - |
| A. | NADH |
| B. | NADPH |
| C. | H+ |
| D. | TPP |
| Answer» C. H+ | |
| 48. |
End product of odd chain fatty acid oxidation is - |
| A. | Acetyl CoA |
| B. | Acetoacetyl CoA |
| C. | Malonyl CoA |
| D. | Propionyl CoA |
| Answer» E. | |
| 49. |
Fatty acids of cholesterol are mainly - |
| A. | Linoleic acid |
| B. | Palmitic acid |
| C. | Oleic acid |
| D. | Linolenic acid |
| Answer» C. Oleic acid | |
| 50. |
What is the most acute effect of smoking cessation ? |
| A. | Shift of oxyhemoglobin curve to the right |
| B. | Increased ciliary function |
| C. | Decreased mucous production |
| D. | Decreased incidence of post operative pneumonia |
| Answer» B. Increased ciliary function | |