Biology MCQs with Answer by General knowledge Solutions

Biology MCQs with Answer by General knowledge Solutions

                                                                               

01. The percentage of nitrogen retained in the body after absorption of diet represents

• (A) Digestibility coefficient of proteins
• (B) Biological value of proteins
• (C) Protein efficiency ratio
• (D) Net protein utilisation

Correct Answer:B

02. In a person increase in weight in gms per gm of protein consumption represents

• (A) Protein efficiency ratio
• (B) Digestibility value of proteins
• (C) Biological value of proteins
• (D) Net protein utilisation

Correct Answer:A

03. The percentage of food nitrogen that is retained in the body represents

• (A) Digestibility coefficient
• (B) Biological value of proteins
• (C) Protein efficiency ratio
• (D) Net protein utilisation

Correct Answer:D

04. The chemical score of different proteins is calculated in terms of

• (A) Egg proteins
• (B) Milk proteins
• (C) Fish proteins
• (D) Wheat proteins

 Correct Answer:A

 05. Biological value of egg protein is

• (A) 94
• (B) 60
• (C) 51
• (D) 40

 Correct Answer:A

 06. Biological value of protein of cow’s milk is

• (A) 95
• (B) 60
• (C) 71
• (D) 67
•  

 Correct Answer:B

  

 07. Biological value of soyabean protein is

• (A) 86
• (B) 71
• (C) 64
• (D) 54

 Correct Answer:C

08. Plasma bicarbonate is decreased in

• (A) Respiratory alkalosis
• (B) Respiratory acidosis
• (C) Metabolic alkalosis
• (D) Metabolic acidosis

 Correct Answer:D

09. Plasma bicarbonate is increased in

• (A) Respiratory alkalosis
• (B) Metabolic alkalosis
• (C) Respiratory acidosis
• (D) Metabolic acidosis

 Correct Answer:B

 10. Total CO2 is increased in

• (A) Respiratory acidosis
• (B) Metabolic alkalosis
• (C) Both respiratory acidosis and metabolic alkalosis
• (D) Respiratory alkalosis

 Correct Answer:C

 11. Respiratory acidosis is caused by

• (A) Increase in carbonic acid relative to bicarbonate
• (B) Decrease in bicarbonate fraction
• (C) Increase in bicarbonate fraction
• (E) Decrease in the carbonic acid fraction

Correct Answer:A

 12. Respiratory alkalosis is caused by

• (A) An increase in carbonic acid fraction
• (B) A decrease in bicarbonic fraction
• (C) A decrease in the carbonic acid fraction
• (D) An increase in bicarbonate fraction

Correct Answer:C

  

13. Meningitis and encephalitis cause

• (A) Metabolic alkalosis
• (B) Respiratory alkalosis
• (C) Metabolic acidosis
• (D) Respiratory acidosis

Correct Answer:B

 14. Metabolic acidosis is caused in

• (A) Uncontrolled diabetes with ketosis
• (B) Pneumonia
• (C) Intestinal Obstruction
• (D) Hepatic coma

Correct Answer:A

 15. Metabolic acidosis is caused in

• (A) Pneumonia
• (B) Prolonged starvation
• (C) Intestinal obstruction
• (D) Bulbar polio

Correct Answer:B

16. Respiratory acidosis occurs in

• (A) Any disease which impairs respiration like emphysema
• (B) Renal disease
• (C) Poisoning by an acid
• (D) Pyloric stenosis

Correct Answer:A

17. Metabolic alkalosis occurs

• (A) As consequence of high intestinal obstruction
• (B) In central nervous system disease
• (C) In diarrhoea
• (D) In colitis

Correct Answer:A

 18. Respiratory alkalosis occurs in

• (A) Hysterical hyperventilation
• (B) Depression of respiratory centre
• (C) Renal diseases
• (D) Loss of intestinal fluids

Correct Answer:A

 19. Morphine poisoning causes

• (A) Metabolic acidosis
• (B) Respiratory acidosis
• (C) Metabolic alkalosis
• (D) Respiratory alkalosis

Correct Answer:B

20. Salicylate poisoning in early stages causes

• (A) Metabolic acidosis
• (B) Respiratory acidosis
• (C) Metabolic alkalosis
• (D) Respiratory alkalosis

Correct Answer:D

 21. The compound having the lowest redox potential amongst the following is

• (A) Hydrogen
• (B) NAD
• (C) Cytochrome b
• (D) Cytochrome a

Correct Answer:A

22. All the oxidases contain a metal which is

• (A) Copper
• (B) FAD
• (C) Manganese
• (D) None of these

Correct Answer:A

23. Isocitrate dehydrogenases is

• (A) Aerobic dehydrogenase
• (B) Anaerobic dehydrogenase
• (C) Hydroperoxidase
• (D) Oxygenase

Correct Answer:B

24. Iron-pophyrin is present as prosthetic group in

• (A) Cytochromes
•  (B) Catalases
• (C) Peroxidase
• (D) None of these

Correct Answer:D

25. Microsomal hydroxylase system contains a

• (A) Di-oxygenase
• (B) Mono-oxygenase
• (C) Both (A) and (B)
•  (D) None of thse

Correct Answer:B

 26. Superoxide radicals can be detoxified by

• (A) Cytochrome c
• (B) Cytochrome b
• (C) Cytochrome a
• (D) None of these

Correct Answer:A

 27. A copper containing cytochrome is

• (A) Cytochrome a
• (B) Cytochrome P-450
• (C) Cytochrome a3
• (D) None of these

Correct Answer:C

 28. Rate of tissue respiration is raised when the intracellular concentration of

• (A) ADP increases
• (B) ATP increases
• (C) ADP decreases
• (D) None of these

Correct Answer:A

 29. Which of the following component of respiratory chain is not attached to the inner mitochondrial membrane?

• (A) Coenzyme Q
• (B) Cytochrome c
• (C) Both (A) and (B)
• (D) None of these

Correct Answer:C

30. In some reactions, energy is captured in the form of

• (A) GTP
• (B) UTP
• (C) CTP
• (D) None of these

Correct Answer:A

31. Substrate-linked phosphorylation occurs in

• (A) Glycolytic pathway
• (B) Citric acid cycle
• (C) Both (A) and (B)
• (D) None of these

Correct Answer:C

 32. Hydrogen peroxide may be detoxified in the absence of an oxygen acceptor by

• (A) Peroxidase
• (B) Catalase
• (C) Both (A) and (B)
• (D) None of these

Correct Answer:B

 33. Superoxide radicals can be detoxified by

• (A) Cytochrome c
• (B) Superoxide dismutase
• (C) Both (A) and (B)
• (D) None of these

Correct Answer:C

 34. The porphyrin present in haem is

• (A) Uroporphyrin
• (B) Protoporphyrin I
• (C) Coproporphyrin
• (D) Protoporphyrin II

Correct Answer:D

 35. An amino acid required for porphyrin synthesis is

• (A) Proline
• (B) Glycine
• (C) Serine
• (D) Histidine

Correct Answer:A

 36. Which of the following coenzyme is required for porphyrin synthesis?

•  (A) Coenzyme A
• (B) Pyridoxal phosphate
• (C) Both (A) and (B)
• (D) None of these

Correct Answer:C

 37. The regulatory enzyme for haem synthesis is

• (A) ALA synthetase
• (B) haem synthetase
• (C) Both (A) and (B)
• (D) None of these

Correct Answer:A

38. Regulation of haem synthesis occurs by

• (A) Covalent modification
• (B) Repression - derepression
• (C) Induction
• (D) Allosteric regulation

Correct Answer:B

 39. Sigmoidal oxygen dissociation curve is a property of

• (A) Haemoglobin
• (B) Carboxyhaemoglobin
• (C) Myoglobin
• (D) Methaemoglobin

Correct Answer:A

   

40. Cyanmethaemoglobin can be formed from

• (A) Oxy Hb
• (B) Met Hb
• (C) Carboxy Hb
• (D) All of these

Correct Answer:B

 41. In thalassemia, an amino acid is substituted in

• (A) Alpha chain
• (B) Beta chain
• (C) Alpha and beta chains
• (D) Any chain

Correct Answer:D

42. Haem synthetase is congenitally deficient in

• (A) Congenital erythropoietic porphyria
• (B) Protoporphyria
• (C) Hereditary coproporphyria
• (D) Variegate porphyria

Correct Answer:B

 43. During breakdown of haem, the methenyl bridge between the following two pyrrole rings is broken:

• (A) I and II
• (B) II and III
• (C) III and IV
• (D) IV and I

Correct Answer:A

 44. Pre- hepatic jaundice occurs because of

• (A) Increased haemolysis
• (B) Liver damage
• (C) Biliary obstruction
•  (D) None of these

Correct Answer:A