Keratin, a structural protein is present in:

  • hair

  • skin

  • wool

  • All of the above

Blood protein is ?

  • albumin

  • haemoglobin

  • both (1) and (2)

  • none of these

The destruction of the biological nature and activity of proteins by heat or chemical agent is called :-

  • Dehydration

  • Denaturation

  • Denitrogenation

  • Deamination

Enzyme trypsin converts:

  • amino acids into proteins

  • glucose into glycogens

  • starch into sugar

  • proteins into amino acids

Kwashiorkor is caused by the deficiency of?

  • vitamins

  • hormones

  • amino acids

  • essential amino acids

Which is fat soluble vitamin?

  • Vitamin A

  • Pyridoxine

  • Riboflavin

  • Thiamine

Which vitamin contains N ?

  • Vitamin A

  • Vitamin C

  • Vitamin B

  • Vitamin D

Vitamin which is believed to cure common cold is ?

  • A

  • C

  • K

  • E

A vitamin which plays a vital role in the coagulating property of blood is:-

  • vitamin A

  • vitamin D

  • vitamin B

  • vitamin K

Which is not a poison for enzymes?

  • CN-                       

  • Fe3+

  • Pb2+                     

  •  AsO43-

The non-proteinous substances which certain enzymes required for their activity are called:

  • catalysts                     

  • inhibitors

  • co-enzymes                 

  • epimers

The complementary base of adenine in one strand to that in the other strand of DNA : 

  • Cytosine

  • Guanine

  • Uracil

  • Thymine

Antibodies are?

  • Carbohydrates

  • proteins

  • phospholipids

  • lipids

Which of the following statements about enzymes is incorrect?

  • The catalytic action of an enzyme is not specific

  • An enzymatic reaction is highly sensitive to temperature

  • The catalytic action of enzymes is due to their capacity to lower the energy of activation of a particular reaction

  • None of the above

Redness of blood is because of the presence of:

  • iron in heme pigment

  • haemoglobin

  • copper in heme pigment

  • all of the above

An antigen develops antibodies which protect the body from their harmful effects. The antibodies
are:-

  • immunoglobulins

  • phospholipids

  • albumins

  • lymphocytes

Which one is a test for proteins?

  • Beilstein test             

  • Biuret test

  • Benedict's test           

  • Molisch test

Insulin has 51 amino acids in two polypeptide chains which are linked by:

  • one disulphide bond

  • two disulphide bonds

  • one sulphide bond

  • three disulphide bonds

Deficiency of which Vitamin  develops impotence:

 

  • B

  • C

  • D

  • E

The hormone insulin is a secretion of the organ:

 

  • ovary

  • testes

  • adrenal cortex

  • pancreas

The process of respiration in absence of oxygen is called:

  • metabolic

  • aerobic

  • anaerobic

  • glycolysis

One mole of glucose on respiration produces:-
  • 36 mole of ATP

  • 34 mole of ATP

  • 40 mole of ATP

  • 38 mole of ATP

Which of the following is protein hormones?

  • Insulin

  • Oxytocin

  • Both (1) and (2)

  • None of the above

The function of DNA is:
  • To synthesize RNA.
  • To synthesize the necessary proteins.
  • To carry the hereditary characteristics from generation to generation.
  • All of the above.

One of the essential α-amino acids is:

  • Lysine 

  • Glycine

  • Serine

  • Proline

Insulin, a protein acts as:

  • an antibody

  • a hormone

  • an enzyme

  • a transport agent

Which one of the following vitamins contains a metal atom?

  • Riboflavin

  • Vitamin B12

  • Vitamin A

  • Vitamin B6

Adenosine is an example of:

  • nucleotide

  • nucleoside

  • purine base

  • pyrimidine base

In both DNA and RNA heterocyclic base and phosphate ester linkages are at:
  •  C51 and C21 respectively of the sugar molecule.
  •  C21 and C51 respectively of the sugar molecule.
  •  C11 and C51 respectively of the sugar molecule.
  •  C51 and C11respectively of the sugar molecule.

Which one of the following statements is correct ?

  • All amino acids are optically active

  • All amino acids except glycine are optically active

  • All amino acids except glutamic acid are optically active

  • All amino acids except lysine are optically active

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Practice Chemistry Quiz Questions and Answers