Select the option which is not correct with respect to enzyme action.                             [2014]

(a) Substrate binds with enzyme as its active site

(b) Addition of lot of succinate does not reverse the inhibition of succinic dehydogenase by malonate.

(c) A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate

(d) Malonate is a competitive inhibitor of succinic dehydrogenase

Concept Questions :-

Factors Affecting Enzyme Catalysis Reaction
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Two free ribonuleotide units are interlinked with                                [1995]

(a) Peptide bond

(b) Covalent bond

(c) Hydrogen bond

(d) Phosphodiester bond

Concept Questions :-

Please attempt this question first.

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Genes are packaged into a bacterial chromosome by                           [1997]

(a) Histones

(b) Basic proteins

(c) Acidic proteins

(d) Actin

Concept Questions :-

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Lactose is composed of                      [1998]

(a) Glucose+Glucose

(b) Glucose+Fructose

(c) Fructose+Galactose

(d) Glucose+Galactose

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In which of the following groups, all the three are examples of polysaccharides?                        [1996]

(a) Starch, glycogen, cellulose

(b) Sucrose, maltose, glucose

(c) Glucose, fructose, lactose

(d) Galactose, starch, sucrose 

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Km value is dependent upon

(a) Temperature

(b) Substrate concentration

(c) Enzyme concentration

(d) All of the above

Concept Questions :-

Factors Affecting Enzyme Catalysis Reaction
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Most abundant organic compound on earth is                     [2001,2004]

(a) Protein

(b) Cellulose

(c) Lipids

(d) Steroids

Concept Questions :-

Element Analysis
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The curve given below shows enzymatic activity with relation to three conditions (pH, temperature and substrate concentration).                                                                                   

What do the two axis (X and Y) represent?

          X-axis                                      Y-axis

(a) Temperature                       -    Enzyme activity

(b) Substrate concentration       -    Enzymatic activity

(c) Enzymatic activity               -     Temperature

(d) Enzymatic activity               -     pH

Concept Questions :-

Factors Affecting Enzyme Catalysis Reaction
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Which one of the following is the correct matching of a vitamin, its nature and its deficiency disease? 
(a) Vitamin-A    -    Fat soluble     -    Night blindness
(b) Vitamin-K    -    Fat soluble     -    Beri-beri
(c) Vitamin-A    -    Fat soluble     -    Beri-beri
(d) Vitamin-K    -    Water soluble -    Pellagra

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To which of the following family do folic acid and pantothenic acid belong? 

(a) Vitamin-C

(b) Vitamin-K 

(c) Vitamin-A

(d) Vitamin-B complex

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