Biochemistry - Mock Test 41

Question 401

Proteins that constitute keratin, collagen and elastin in body are?

A) Protamines B) Phosphol proteins C) Scleroproteins D) Metaproteins

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Question 402

Optical isomers of all aminoacids exist except?

A) Glycine B) Arginine C) Alanine D) Hydroxy proline

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Question 403

Isoelectric pH of an amino acid is that pH at which it has a?

A) Positive charge B) Negative charge C) Nil net charge D) None of these

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Question 404

Protein present in hemoglobin has the structure known as?

A) Primary B) Secondary C) Tertiary D) Quarternary

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Question 405

In nitroprusside test, amino acid cysteine produces a?

A) Red colour B) Blue colour C) Yellow colour D) Purple colour

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Question 406

Group that reacts in the Biuret test?

A) Peptide B) Amino group C) Carboxylic group D) Aldehyde group

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Question 407

Plasma proteins act as?

A) Buffers B) Immunoglobulins C) Reserve proteins D) All of these

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Question 408

The bond in proteins that is not broken under usual conditions of denaturation?

A) Hydrophobic bond B) Hydrogen bond C) Disulphide bond D) Peptide bonds

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Question 409

Hydrated density of ( HD ) lipoproteins is?

A) 0.94 gm/ml B) 0.94-1.006 gm/ml C) 1.006-1.063 gm/ml D) 1.063-1.21 gm/l

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Question 410

Number of amino acids present in plants, animals and microbial proteins?

A) 20 B) 80 C) 150 D) 200

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