Cysteine can partially meet the requirement of (A) Phenylalanine (B) Threonine (C) Methionine (D) None of these

1 Answer

Answer :

Answer : C

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Description : Cysteine can be synthesized from methionine and (A) Serine (B) Homoserine (C) Homocysteine (D) Threonine

Last Answer : Answer : A

Description : All the following are sulphur containing amino acids found in proteins except (A) Cysteine (B) Cystine (C) Methionine (D) Threonine

Last Answer : Answer : D

Description : All the following are sulphur containing amino acids found in proteins except (A) Cysteine (B) Cystine (C) Methionine (D) Threonine

Last Answer : (D) Threonine

Description : In the B chain of insulin molecule, the Nterminal amino acid is (A) Proline (B) Threonine (C) Phenylalanine (D) Lysine

Last Answer : Answer : C

Description : The amino acid containing an indole ring: (A) Tryptophan (B) Arginine (C) Threonine (D) Phenylalanine

Last Answer : Answer : A

Description : The limiting amino acid of fish proteins is (A) Tryptophan (B) Cysteine (C) Lysine (D) Threonine

Last Answer : Answer : A

Description : A ketogenic amino acid is (A) Valine (B) Cysteine (C) Leucine (D) Threonine

Last Answer : Answer : C

Description : Both folic acid and methyl cobalamin (vitamin B12) are required in (A) Deamination of serine (B) Deamination of threonine (C) Conversion of pyridoxal phosphate to pyridoxamine phosphate (D) Methylation of homocystein to methionine

Last Answer : Answer : D

Description : The side chain of which of the following amino acid contain sulphur atom? (A) Methionine (B) Threonine (C) Leucine (D) Tryptophan

Last Answer : Answer : A

Description : Pulses are deficient in (A) Lysine (B) Threonine (C) Methionine (D) Tryptophan

Last Answer : Answer : C

Description : Phenylalanine, ornithine and methionine are involved in the biogenesis of (A) Lysergic acid (B) Reserpine (C) L-Hyoscyamine (D) Papaverine

Last Answer : Answer : A

Description : Pulses are rich in (A) Lysine (B) Methionine (C) Tryptophan (D) Phenylalanine

Last Answer : Answer : A

Description : In mammalian tissues serine can be a biosynthetic precursor of (A) Methionine (B) Glycine (C) Tryptophan (D) Phenylalanine

Last Answer : Answer : B

Description : In E. coli the chain initiating amino acid in protein synthesis is (A) N-formyl methionine(B) Methionine (C) Serine (D) Cysteine

Last Answer : Answer : A

Description : Sulphydryl group is present in (A) Cysteine (B) Methionine (C) Both (A) and (B) (D) None of these

Last Answer : Answer : A

Description : Cystine is synthesized from (A) Cysteine (B) Methionine (C) Arginine (D) Leucine

Last Answer : Answer : A

Description : The limiting amino acid in wheat is (A) Leucine (B) Lysine (C) Cysteine (D) Methionine

Last Answer : Answer : B

Description : Methionine is synthesized in human body from (A) Cysteine and homoserine (B) Homocysteine and serine (C) Cysteine and serine (D) None of these

Last Answer : Answer : D

Description : A disulphide bond can be formed between (A) Two methionine residues (B) Two cysteine residues (C) A methionine and a cysteine residue (D) All of these

Last Answer : Answer : B

Description : In humans the sulphur of methionine and cysteine is excreted mainly as (A) Ethereal sulphate (B) Inorganic sulphate (C) Sulphites (D) Thioorganic compound

Last Answer : Answer : B

Description : .Khorana first deciphered the triplet codons of (a) serine and isoleucine (b) cysteine and valine (c) tyrosine and tryptophan (d) phenylalanine and methinonine.

Last Answer : (a) serine and isoleucine

Description : Khorana first deciphered the triplet codons of (a) serine and isoleucine (b) cysteine and valine (c) tyrosine and tryptophan (d) phenylalanine and methinonine

Last Answer : (b) cysteine and valine

Description : For the synthesis of amino acids cysteine, cystine and methionine the element required is a. Sulphur b. Oxygen c. Nitrogen d. None of these

Last Answer : Ans: D

Description : A ketogenic amino acid among the following is (A) Leucine (B) Serine (C) Threonine (D) Proline

Last Answer : Answer : A

Description : In purine biosynthesis carbon atoms at 4 and 5 position and N at 7 position are contributed by (A) Glycine (B) Glutamine (C) Alanine (D) Threonine

Last Answer : Answer : A

Description : Which of the following amino acids produce a vasoconstrictor on decarboxylation? (A) Histidine (B) Tyrosine (C) Threonine (D) Arginine

Last Answer : Answer : B

Description : In the B chain of insulin molecule, the C-terminal amino acid: (A) Threonine (B) Tyrosine (C) Glutamate (D) Valine

Last Answer : Answer : A

Description : In the A chain of insulin molecule the Cterminal amino acid is (A) Asparagine (B) Threonine (C) Valine (D) Tyrosine

Last Answer : Answer : A

Description : The proteins present in maize are deficient in (A) Lysine (B) Threonine (C) Tryptophan (D) Tyrosine

Last Answer : Answer : C

Description : An essential amino acid in man is (A) Proline (B) Threonine (C) Asparagine (D) Tyrosine

Last Answer : Answer : B

Description : Most amino acids are substrates for transamination except (A) Alanine (B) Threonine (C) Serine (D) Valine

Last Answer : Answer : B

Description : All the standard amino acids except the following have one chiral ‘c’ atom: (A) Threonine, Isoleucine (B) Isoleucine, Alanine (C) Threonine, Alanine (D) Alanine, Glutamine

Last Answer : Answer : C

Description : The lone pair of electrons at one of the ring nitrogens in the given amino acid makes a potential ligand, which is important in binding the iron atoms in hemoglobin: (A) Tryptophan (B) Threonine (C) Histidine (D) Serine

Last Answer : Answer : C

Description : The amino acid containing hydroxyl group: (A) Alanine (B) Isoleucine (C) Arginine (D) Threonine

Last Answer : Answer : D

Description : All amino acids are optically active except (A) Glycine (B) Serine (C) Threonine (D) Tryptophan

Last Answer : Answer : A

Description : This amino acid cannot have optical isomers: (A) Alanine (B) Histidine (C) Threonine (D) Glycine

Last Answer : Answer : D

Description : Two amino groups are present in (A) Leucine (B) Glutamate (C) Lysine (D) Threonine

Last Answer : Answer : C

Description : The amino acid with a nonpolar side chain is (A) Serine (B) Valine (C) Asparagine (D) Threonine

Last Answer : Answer : B

Description : The optically inactive amino acid is (A) Glycine (B) Serine (C) Threonine (D) Valine

Last Answer : Answer : A

Description : The optically inactive amino acid is (A) Glycine (B) Serine (C) Threonine (D) Valine

Last Answer : (A) Glycine

Description : Maple syrup urine disease results from absence or serve deficiency of (A) Homogentisate oxidase (B) Phenylalanine hydroxylase (C) Branched chain amino acid transaminase (D) None of these

Last Answer : Answer : D

Description : Gout is a metabolic disorder of catabolism of (A) Pyrimidine (B) Purine (C) Alanine (D) Phenylalanine

Last Answer : Answer : B

Description : Tyrosine hydroxylase is inhibited by (A) Catecholamines (B) α−Methyldopa (C) Phenylalanine (D) Vanillyl mandelic acid

Last Answer : Answer : A

Description : The rate limiting step in catecholamine synthesis is catalysed by (A) Phenylalanine hydroxylase (B) Tyrosine hydroxylase (C) Dopa decarboxylase (D) Phenylethanolamine N-methyl transferase

Last Answer : Answer : B

Description : Melatonin is synthesised from (A) Phenylalanine (B) Tyrosine (C) Tryptophan (D) None of these

Last Answer : Answer : C

Description : In A chain of the insulin molecule the Nterminal amino acid is (A) Glycine (B) Valine (C) Serine (D) Phenylalanine

Last Answer : Answer : A

Description : Thyroid hormones are synthesized by the iodination of the amino acid: (A) Glycine (B) Phenylalanine (C) Alanine (D) Tyrosine

Last Answer : Answer : D

Description : A characteristic of pheochromocytoma is elevated urinary excretion of (A) Dopamine (B) Tyrosine (C) Vinylmandelic acid (D) Phenylalanine

Last Answer : Answer : C

Description : For Catecholamine biosynthesis the rate limiting enzyme is (A) DOPA decarboxylase (B) DOPAMINE β-hydroxylase (C) Tyrosine hydroxylase (D) Phenylalanine hydroxylase

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Description : From the pentapeptide, phe-ala-leu-lysarg, phenylalanine residue is split off by (A) Trypsin (B) Chymotrypsin (C) Aminopeptidase (D) Carboxypeptidase

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