BIO CHEMISTRY MCQs
BIO CHEMISTRY MCQs
01. In human and other ureotelic organisms, the end product
of amino acid nitrogen metabolism:
(A) Bile acids
(B) Ketone bodies
(C) Urea
(D) Barium sulphate
02. The end product of amino acid nitrogen metabolism in uricotelic organisms (reptiles and birds) is
(A) Bilirubin
(B) Urea
(C) Uric acid
(D) Biliverdin
03. The transaminase activity needs the coenzyme:
(A) ATP
(B) B6 – PO4
(C) FAD+
(D) NAD+
04. Transamination is a
(A) Irreversible process
(B) Reversible process
(C) Both (A) and (B)
(D) None of these
05. Most amino acids are substrates for transamination except
(A) Alanine
(B) Threonine
(C) Serine
(D) Valine
06 Oxidative conversion of many amino acids to their corresponding -ketoacids occurs in mammalian:
(A) Liver and kidney
(B) Adipose tissue
(C) Pancreas
(D) Intestine
07. The α-ketoacid is decarboxylated by H2O2 forming a carboxylic acid with one carbon atom less in the absence of the enzyme:
(A) Catalase
(B) Decarboxylase
(C) Deaminase
(D) Phosphatase
08. The activity of mammalian L-amino acid oxidase, an FMN – flavo protein, is quite
(A) Slow
(B) Rapid
(C) Both (A) and (B)
(D) None of these
09. From dietary protein as well as from the urea present in fluids secreted into the gastrointestinal tract intestinal bacteria produce
(A) Carbondioxide
(B) Ammonia
(C) Ammonium sulphate
(D) Creatine
10. The symptom of ammonia intoxication includes
(A) Blurring of vision
(B) Constipation
(C) Mental confusion
(D) Diarrhoea
11. Ammonia intoxication symptoms occur when brain ammonia levels are
(A) Slightly diminished
(B) Highly diminished
(C) Increased
(D) All of these
(A) Bile acids
(B) Ketone bodies
(C) Urea
(D) Barium sulphate
02. The end product of amino acid nitrogen metabolism in uricotelic organisms (reptiles and birds) is
(A) Bilirubin
(B) Urea
(C) Uric acid
(D) Biliverdin
03. The transaminase activity needs the coenzyme:
(A) ATP
(B) B6 – PO4
(C) FAD+
(D) NAD+
04. Transamination is a
(A) Irreversible process
(B) Reversible process
(C) Both (A) and (B)
(D) None of these
05. Most amino acids are substrates for transamination except
(A) Alanine
(B) Threonine
(C) Serine
(D) Valine
06 Oxidative conversion of many amino acids to their corresponding -ketoacids occurs in mammalian:
(A) Liver and kidney
(B) Adipose tissue
(C) Pancreas
(D) Intestine
07. The α-ketoacid is decarboxylated by H2O2 forming a carboxylic acid with one carbon atom less in the absence of the enzyme:
(A) Catalase
(B) Decarboxylase
(C) Deaminase
(D) Phosphatase
08. The activity of mammalian L-amino acid oxidase, an FMN – flavo protein, is quite
(A) Slow
(B) Rapid
(C) Both (A) and (B)
(D) None of these
09. From dietary protein as well as from the urea present in fluids secreted into the gastrointestinal tract intestinal bacteria produce
(A) Carbondioxide
(B) Ammonia
(C) Ammonium sulphate
(D) Creatine
10. The symptom of ammonia intoxication includes
(A) Blurring of vision
(B) Constipation
(C) Mental confusion
(D) Diarrhoea
11. Ammonia intoxication symptoms occur when brain ammonia levels are
(A) Slightly diminished
(B) Highly diminished
(C) Increased
(D) All of these
12. Ammonia production by the kidney is depressed in
(A) Acidosis
(B) Alkalosis
(C) Both (A) and (B)
(D) None of these
13. Ammonia is excreted as ammonium salts during metabolic acidosis but the majority is excreted as
(A) Phosphates
(B) Creatine
(C) Uric acid
(D) Urea
14. Synthesis of glutamine is accompanied by the hydrolysis of
(A) ATP
(B) ADP
(C) TPP
(D) Creatin phosphate
15. In brain, the major metabolism for removal of ammonia is the formation of
(A) Glutamate
(B) Aspartate
(C) Asparagine
(D) Glutamine
16. Carbamoyl phosphate synthetase structure is marked by change in the presence of
(A) N-Acetyl glutamate
(B) N-Acetyl Aspartate
(C) Neuraminic acid
(D) Oxalate
17. The biosynthesis of Urea occurs mainly in the Liver:
(A) Cytosol
(B) Microsomes
(C) Nucleus
(D) Mitochondria
18. One mol. of Urea is synthesized at the expense of the _______ mols. of ATP.
(A) 2
(B) 3
(C) 4
(D) 5
19. Urea biosynthesis occurs mainly in the liver involving the number of amino acids:
(A) 3
(B) 4
(C) 5
(D) 6
20. The normal daily output of Urea through urine in grams:
(A) 10 to 20
(B) 15 to 25
(C) 20 to 30
(D) 25 to 35
(A) Acidosis
(B) Alkalosis
(C) Both (A) and (B)
(D) None of these
13. Ammonia is excreted as ammonium salts during metabolic acidosis but the majority is excreted as
(A) Phosphates
(B) Creatine
(C) Uric acid
(D) Urea
14. Synthesis of glutamine is accompanied by the hydrolysis of
(A) ATP
(B) ADP
(C) TPP
(D) Creatin phosphate
15. In brain, the major metabolism for removal of ammonia is the formation of
(A) Glutamate
(B) Aspartate
(C) Asparagine
(D) Glutamine
16. Carbamoyl phosphate synthetase structure is marked by change in the presence of
(A) N-Acetyl glutamate
(B) N-Acetyl Aspartate
(C) Neuraminic acid
(D) Oxalate
17. The biosynthesis of Urea occurs mainly in the Liver:
(A) Cytosol
(B) Microsomes
(C) Nucleus
(D) Mitochondria
18. One mol. of Urea is synthesized at the expense of the _______ mols. of ATP.
(A) 2
(B) 3
(C) 4
(D) 5
19. Urea biosynthesis occurs mainly in the liver involving the number of amino acids:
(A) 3
(B) 4
(C) 5
(D) 6
20. The normal daily output of Urea through urine in grams:
(A) 10 to 20
(B) 15 to 25
(C) 20 to 30
(D) 25 to 35
21. In glycoproteins the carbohydrate is in the form of
disaccharide units, the number of units are (A) 50–100
(B) 200–300
(C) 400–500
(D) 600–700
22. The milk protein in the stomach of the infants is digested by
(A) Pepsin
(B) Trypsin
(C) Chymotrypsin
(D) Rennin
23. Achylia gastrica is said to be when absence of
(A) Pepsin only
(B) Both pepsin and HCl
(C) HCl only
(D) All of these
24. The pH of gastric juice become low in
(A) Hemolytic anemia
(B) Pernicious anemia
(C) Both (A) and (B)
(D) None of these
25. In small intestine trypsin hydrolyzes peptide linkages containing
(A) Arginine
(B) Histidine
(C) Serine
(D) Aspartate
26. Chymotrypsin in the small intestine hydrolyzes peptide linkages containing
(A) Alanine
(B) Pheynl alanine
(C) Valine
(D) Methionine
27. Carboxy peptidase B in the small intestine hydrolyzes peptides containing
(A) Leucine
(B) Isoleucine
(C) Arginine
(D) Cysteine
28. The transport of amino acids regulated by active processes of different numbers:
(A) 1
(B) 2
(C) 3
(D) 4
29. The third active process for amino acids transport involves
(A) Acidic amino acids
(B) Basic amino acids
(C) Neutral amino acids
(D) Sulphur containing amino acids
30. The neutral amino acids for absorption need
(A) TPP
(B) B6 – PO4
(C) NAD+
(D) NADP+
31. If one amino acid is fed excess, the absorption of another is
(A) Slightly accelerated
(B) Moderately accelerated
(C) Highly accelerated
(D) Retarded
32. Under normal conditions, food proteins are generally readily digested upto the present
(A) 67 to 73
(B) 74 to 81
(C) 82 to 89
(D) 90 to 97
33. By overheating the nutritional value of cereal proteins is
(A) Increased
(B) Decreased
(C) Unchanged
(D) None of these
34. More than half of the protein of the liver and intestinal mucosa are broken down and resynthesised in
(A) 10 days
(B) 12 days
(C) 15 days
(D) 18 days
35. The half-life of antibody protein is about
(A) 4 weeks
(B) 3 weeks
(C) 2 weeks
(D) 1 week
36. Protein anabolism is stimulated by
(A) ACTH
(B) Testosterone
(C) Glucagon
(D) Epinephrine
37. The metabolism of protein is integrated with that of carbohydrate and fat through
(A) Oxaloacetate
(B) Citrate
(C) Isocitrate
(D) Malate
38. The building up and breaking down of protoplasm are concerned with the metabolism of
(A) Carbohydrate
(B) Lipid
(C) Protein
(D) Minerals
39. The amino acids abstracted from the liver are not utilized for repair or special synthesis but are broken down to
(A) Keto acids
(B) Sulphur dioxide
(C) Water
(D) Ammonia
(B) 200–300
(C) 400–500
(D) 600–700
22. The milk protein in the stomach of the infants is digested by
(A) Pepsin
(B) Trypsin
(C) Chymotrypsin
(D) Rennin
23. Achylia gastrica is said to be when absence of
(A) Pepsin only
(B) Both pepsin and HCl
(C) HCl only
(D) All of these
24. The pH of gastric juice become low in
(A) Hemolytic anemia
(B) Pernicious anemia
(C) Both (A) and (B)
(D) None of these
25. In small intestine trypsin hydrolyzes peptide linkages containing
(A) Arginine
(B) Histidine
(C) Serine
(D) Aspartate
26. Chymotrypsin in the small intestine hydrolyzes peptide linkages containing
(A) Alanine
(B) Pheynl alanine
(C) Valine
(D) Methionine
27. Carboxy peptidase B in the small intestine hydrolyzes peptides containing
(A) Leucine
(B) Isoleucine
(C) Arginine
(D) Cysteine
28. The transport of amino acids regulated by active processes of different numbers:
(A) 1
(B) 2
(C) 3
(D) 4
29. The third active process for amino acids transport involves
(A) Acidic amino acids
(B) Basic amino acids
(C) Neutral amino acids
(D) Sulphur containing amino acids
30. The neutral amino acids for absorption need
(A) TPP
(B) B6 – PO4
(C) NAD+
(D) NADP+
31. If one amino acid is fed excess, the absorption of another is
(A) Slightly accelerated
(B) Moderately accelerated
(C) Highly accelerated
(D) Retarded
32. Under normal conditions, food proteins are generally readily digested upto the present
(A) 67 to 73
(B) 74 to 81
(C) 82 to 89
(D) 90 to 97
33. By overheating the nutritional value of cereal proteins is
(A) Increased
(B) Decreased
(C) Unchanged
(D) None of these
34. More than half of the protein of the liver and intestinal mucosa are broken down and resynthesised in
(A) 10 days
(B) 12 days
(C) 15 days
(D) 18 days
35. The half-life of antibody protein is about
(A) 4 weeks
(B) 3 weeks
(C) 2 weeks
(D) 1 week
36. Protein anabolism is stimulated by
(A) ACTH
(B) Testosterone
(C) Glucagon
(D) Epinephrine
37. The metabolism of protein is integrated with that of carbohydrate and fat through
(A) Oxaloacetate
(B) Citrate
(C) Isocitrate
(D) Malate
38. The building up and breaking down of protoplasm are concerned with the metabolism of
(A) Carbohydrate
(B) Lipid
(C) Protein
(D) Minerals
39. The amino acids abstracted from the liver are not utilized for repair or special synthesis but are broken down to
(A) Keto acids
(B) Sulphur dioxide
(C) Water
(D) Ammonia
40. The unwanted amino acids abstracted from the tissues
are either used up by the tissue or in the liver converted into
(A) Ammonia
(B) Urea
(C) Ammonium salts
(D) Uric acid
41. Amino acids provide the nitrogen for the synthesis of
(A) The bases of the phospholipids
(B) Uric acid
(C) Glycolipids
(D) Chondroitin sulphates
42. The metabolism of all proteins ingested over and above the essential requirements is called
(A) Exogenous metabolism
(B) Endogenous metabolism
(C) Both (A) and (B)
(D) None of these
43. Sulphur containing amino acids after catabolism produces a substance which is excreted:
(A) SO2
(B) HNO3
(C) H2SO4
(D) H3PO4
44. Ethereal sulphate is synthesized from the _________ amino acid.
(A) Neutral
(B) Acidic
(C) Basic
(D) Sulphur containing
45. The amino acids required for creatine formation:
(A) Glycine
(B) Arginine
(C) Methionine
(D) All of these
(A) Ammonia
(B) Urea
(C) Ammonium salts
(D) Uric acid
41. Amino acids provide the nitrogen for the synthesis of
(A) The bases of the phospholipids
(B) Uric acid
(C) Glycolipids
(D) Chondroitin sulphates
42. The metabolism of all proteins ingested over and above the essential requirements is called
(A) Exogenous metabolism
(B) Endogenous metabolism
(C) Both (A) and (B)
(D) None of these
43. Sulphur containing amino acids after catabolism produces a substance which is excreted:
(A) SO2
(B) HNO3
(C) H2SO4
(D) H3PO4
44. Ethereal sulphate is synthesized from the _________ amino acid.
(A) Neutral
(B) Acidic
(C) Basic
(D) Sulphur containing
45. The amino acids required for creatine formation:
(A) Glycine
(B) Arginine
(C) Methionine
(D) All of these
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