Entry Test MCQ :: Biological Molecules

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41.

Proteins comprise of _____% of the total dry weight of a cell.

A.	40%	B.	50%
C.	60%	D.	70%

42.

Proteins are polymers of

A.	Fatty acids	B.	Isoprenoid units
C.	Amino acids	D.	Nucleotides

43.

The element in basic structure of proteins which differentiate them from carbohydrates is

A.	C	B.	S
C.	H	D.	N

44.

Total number of amino acids discovered so far in cells and tissues are

A.	20	B.	25
C.	150	D.	170

45.

In Glycin an amino acid R group is replaced by

A.	H	B.	CH3
C.	COOH	D.	C = O

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

47.

Total number of amino acids in a hemoglobin molecule are:

A.	554	B.	564
C.	574	D.	584

48.

An insulin molecule consists of _____ polypeptide chains.

A.	1	B.	2
C.	3	D.	4

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

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