Entry Test MCQ :: Biological Molecules p3

NOTE :ANSWERS ARE PRESENT AFTER 5 MCQs

41.	Proteins comprise of _____% of the total dry weight of a cell.
	A. 40% B. 50% C. 60% D. 70%

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42.	Proteins are polymers of
	A. Fatty acids B. Isoprenoid units C. Amino acids D. Nucleotides

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43.	The element in basic structure of proteins which differentiate them from carbohydrates is
	A. C B. S C. H D. N

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44.	Total number of amino acids discovered so far in cells and tissues are
	A. 20 B. 25 C. 150 D. 170

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45.	In Glycin an amino acid R group is replaced by
	A. H B. CH3 C. COOH D. C = O ANSWERS OF ABOVE Five MCQs 41.(B) 42.(C) 43.(B) 44.(D) 45.(A)

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46.	A bond formed by linkage between -OH of carboxyl group of one amino acid and H of amino group of another amino acid which releases water is called
	A. Phosphodiester linkage B. Glycosidic bond C. Peptide bond D. Hydrogen bond

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47.	Total number of amino acids in a hemoglobin molecule are:
	A. 554 B. 564 C. 574 D. 584

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48.	An insulin molecule consists of _____ polypeptide chains.
	A. 1 B. 2 C. 3 D. 4

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49.	Which structure of protein gives information aboutnumber and sequence of amino acids in it?
	A. Primary structure B. Secondary structure C. Tertiary structure D. Quaternary structure

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50.	In an aqueous environment the most stable tertiary conformation is that in which ______ amino acids are buried inside the conformation.
	A. Hydrophobic B. Hydrophilic C. Basic D. None of these

ANSWERS OF ABOVE Five MCQs
46.(C) 47.(C) 48.(B) 49.(B) 50.(A)

51.	Hemoglobin molecule exhibits which structural organization of proteins
	A. Primary structure B. Secondary structure C. Tertiary structure D. Quaternary structure

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52.	?- helical structure is kept by the formation of _____ bonds among amino acids molecules.
	A. H bonds B. Disulphide Bond C. Ionic bond D. Hydrophobic bonds

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53.	Which of the following does not show quaternary structure?
	A. Haemoglobin B. Pepsin C. Fibrin D. Insulin

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54.	Which structural organization is most common in globular proteins?
	A. Primary B. Secondary C. Tertiary D. Quaternary

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55.	Actin and myosin are the basic proteins involved in contractile machinery of our body to which type of proteins do they belong?
	A. Globular proteins B. Fibrous Proteins C. Both a and b D. None of these ANSWERS OF ABOVE Five MCQs 51.(D) 52.(A) 53.(C) 54.(C) 55.(B)

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56.	Antibodies play important role against microorganisms and other pathogens to which type of proteins do they belong?
	A. Globular proteins B. Fibrous Proteins C. Both a and b D. None of these

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57.	ATP is a an important molecule for its major function
	A. As an energy currency of the cell B. As a coenzyme C. Both a and b D. None of these

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58.	Each turn of DNA contain _______ nitrogenous base pairs
	A. 5 B. 10 C. 20 D. 25

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59.	The first organism of whose genome was completely discovered was
	A. Human beings B. Influenza Virus C. Hemophilus Influenza D. None of these

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60.	Which of the following statement is incorrect about RNA?
	A. The pentose sugar in it is Ribose. B. It contains Adenine Guanine Thymine and Cytosine C. It is present in the nucleoli D. It may be folded back on itself to give double helical characteristics.

ANSWERS OF ABOVE Five MCQs56.(A) 57.(A) 58.(B) 59.(C) 60.(B)