Given below is the diagrammatic representation of one of the categories of small
molecular weight organic compounds in the living tissues. Identify the category shown
and the one blank component X in it
Category Component
1. Cholesterol Guanin
2. Amino acid NH2
3. Nucleotide Adenine
4. Nucleoside Uracil
Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched
with the category mentioned against it?
1. Thymine, Uracil - Pyrimidines
2. Uracil, Cytosine - Pyrimidines
3. Guanine, Adenine - Purines
4. Adenine, Thymine - Purines
An organic substance bound to an enzyme and essential for its activity is called:
1. coenzyme
2. holoenzyme
3. apoenzyme
4. isoenzyme
The inhibition of succinic dehydrogenase by malonate is an example of
1. competitive inhibition
2. non-competitive inhibition
3. allosteric modulation
4. none of the above
In a 50 gm living tissue, what would be the amount of water?
(1) 15-25 gm
(2) 25-30 gm
(3) 35-45 gm
(4) 70-90 gm
Which of the following elements is present in very less quantity in the body?
(1) K
(2) Ca
(3) Mg
(4) Cu
In a normal adult, ascending order of concentration of following molecules is
(1) K>Na>Fe>Cu
(2) Na>K>Cu>Fe
(3) Fe>Na>K>Cu
(4) Na>Fe>K>Cu
The quaternary structure of a protein:
(1) Consists of 4 subunits - hence the name quaternary
(2) Is unrelated to the function of the protein
(3) Both (a) and (b)
(4) Depends on the 1° structure of subunits
Adult human haemoglobin consists of:
(1) 2 subunits (β, β)
(2) 2 subunits (α, α)
(3) 4 subunits (2α, 2β)
(4) 3 subunits (2α, 1β)
Which one is false?
(1) Fatty acids may be unsaturated (with one or more C = C bonds) or a saturated (without double bonds)
(2) Fatty acid(s) may be esterified with glycerol forming monoglyceride, diglyceride and then triglyceride
(3) Some tissues especially neural tissues have lipids with very simple structures
(4) Fats and oils are triglycerides