Biochemistry - Mock Test 56

Question 551

One of the given example is an amino acid?

A) Oh-Lysine B) Protein C) Leucine D) Serine

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Question 552

Which one of the following statements concerning glutamine is correct?

A) Contains three tetratable groups B) Is classified as an acidic amino acid C) Contains an amide group D) Migrates to the cathode during electrophoresis at pH 7.0

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Question 553

Which one of the amino acids could serve as the best buffer at pH 7?

A) Glutamic acid B) Arginine C) Valine D) Histidine

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Question 554

The greatest buffering capacity at physiologic pH would be provided by a protein rich in which of the following amino acids ?

A) Lysine B) Histidine C) Aspartic acid D) Valine

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Question 555

Which of the following techniques is used to separate proteins based upon differences in their mass?

A) Isoelectric focusing B) Dialysis C) SDS-gel Electrophoresis D) Western blotting

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Question 556

The highest concentration of cystine can be found in?

A) Melanin B) Chondroitin sulphate C) Myosin D) Keratin

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Question 557

Isoenzymes for a given reaction?

A) Have different spedificities B) Have identical affinities for the same substrate C) Exhibit different electrophoretic motilities D) Contain similar ratios of different polypeptide chains

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Question 558

Which of the following statement about the peptide bond is true?

A) It is a carbon-carbon bond B) It has cis hydrogen and oxygen groups C) It is planar D) It has rotational freedom

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Question 559

The semialdehydes are formed under the action of enzymes characterised as?

A) Aldolases B) Peptidyl lysyl oxidases C) Collagenases D) Elastases

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Question 560

Citrulline is an intermediate of?

A) TCA cycle B) Urea cycle C) Pentose cycle D) Calvin cycle

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