Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein
Non-competitive inhibitors often bind to the enzyme irreversibly
Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme
Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate

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Q. 6 of Quiz-1446 (Que-ID : 3932)

Which of the following is not a pyrimidine?

Uracil
Cytosine
Guanine
Thymine

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Q. 7 of Quiz-1446 (Que-ID : 3933)

Hydrolysis of starch occurs with the help of

Peptidase
Amylase
Sucrose
Lipase

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Q. 8 of Quiz-1446 (Que-ID : 3934)

Assertion: Arachidic acid is an unsaturated fatty acid Reason: There are one or more double bonds between carbon atoms in unsaturated fatty acids

Both Assertion and Reason are true and Reason is the correct explanation of the Assertion
Both Assertion and Reason are true but the Reason is not the correct explanations of Assertion
Assertion is true, but Reason is false.
Both Assertion and Reason are false

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Q. 9 of Quiz-1446 (Que-ID : 3935)

Which of the following influence feedback inhibition of enzyme?

End product
External factors
Enzyme
Substrate

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Q. 10 of Quiz-1446 (Que-ID : 3936)

Which of the following is not a polysaccharide?

Lactose
Starch
Glycogen
Dextrin

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Q. 11 of Quiz-1446 (Que-ID : 3937)

Inulin is made up of _ and _

glucose and fructose
glucose and fructose
fructose and mannose
mannose and glucose

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Q. 12 of Quiz-1446 (Que-ID : 3938)

A protein having both structural and enzymatic traits is

Collagen
Trypsin
Myosin
Actin

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Q. 13 of Quiz-1446 (Que-ID : 3939)

NADP contains vitamin ______

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Q. 14 of Quiz-1446 (Que-ID : 3940)

With reference to enzymes, which one of the following statements is true?

Apoenzyme = Holoenzyme + Coenzyme
Coenzyme = Apoenzyme + Holoenzyme
Holoenzyme = Apoenzyme + Coenzyme
Holoenzyme = Coenzyme ? Apoenzyme

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Q. 15 of Quiz-1446 (Que-ID : 3941)

Inhibitor binds to the active site of the enzyme. Hence blocking the reaction. This is an example of

allosteric inhibition
feedback inhibition
uncompetitive inhibition
competitive inhibition

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Q. 16 of Quiz-1446 (Que-ID : 3942)

The fastest enzyme known is

DNA polymerase
carbonic anhydrase
carbonic dehydrogenase
DNA ligase

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Q. 17 of Quiz-1446 (Que-ID : 3943)

Lecithin is a

polysaccharide
protein
nucleic acid
lipid

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Q. 18 of Quiz-1446 (Que-ID : 3944)

The minimum amount of energy required to initiate a chemical reaction is called

enzymatic energy
activation energy
substrate energy
initiation energy

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Q. 19 of Quiz-1446 (Que-ID : 3945)

Enzymes, vitamins and hormones are common in

Enhancing oxidative metabolism
Being synthesised in the body of organisms
Being proteinaceous
Regulating metabolism

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Q. 20 of Quiz-1446 (Que-ID : 3946)

Nitrogenous bases present in DNA

Adenine, guanine, cytosine, uracil
Adenine, guanine, cytosine, thymine
Adenine, thymine, uracil
Guanine, uracil

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Q. 21 of Quiz-1446 (Que-ID : 3947)

Metabolic intermediates found in living system which are essential for growth and life is called___________

Saponins
Tannins
Secondary metabolite
Primary metabolites

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Q. 22 of Quiz-1446 (Que-ID : 3948)

Enormous diversity of protein molecules is due to

R groups of amino acids
Sequence of amino acids
Peptide bonds
Amino groups of amino acids

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Q. 23 of Quiz-1446 (Que-ID : 3949)

Anti-parallel strands of a DNA molecule mean that

One strand turns anticlockwise
Phosphate groups at the start of two DNA strands (poles) are in opposite position
Phosphate groups of two DNA strands at their ends share the same position
One strand turns clockwise

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Q. 24 of Quiz-1446 (Que-ID : 3950)

The introduction of t-DNA into plants involves

Altering the pH of the soil, then heat shocking the plants
Exposing the plants to cold for a brief period
Allowing the plant roots to stand in water
Infection of the plant by Agrobacterium tumefaciens

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Q. 25 of Quiz-1446 (Que-ID : 3951)

The most common monomer of carbohydrates is

Sucrose
Fructose
Maltose
Glucose

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More MCQs In - Zoology Class 11th

Q. 12 of Quiz- (Que-ID : 2805)

The function of vagus nerve innervating the heart is to

Initiate the heart beat
Reduce the heart beat
Accelerate the heart beat
Maintain constant heart beat

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Q. 2 of Quiz- (Que-ID : 3928)

An example of competitive inhibition of an enzyme is the inhibition of

succinic dehydrogenase by malonic acid
cytochrome oxidase by cyanide
hexokinase by glucose-6-phosphate
carbonic anhydrase by carbon dioxide

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Q. 10 of Quiz- (Que-ID : 2623)

Which pH is optimum for salivary amylase to work

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Q. 16 of Quiz- (Que-ID : 2985)

Which gland remove substances like sterols, hydrocarbons and waxes

Pineal gland
Pancreas
Gall bladder
Sweat glands

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Q. 1 of Quiz- (Que-ID : 3194)

Quiescent centre is present in the

apical meristem
shoot meristem
lateral meristem
root meristem

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Q. 17 of Quiz- (Que-ID : 2630)

The small finger like foldings in small intestine is called

Rugae
Villi
Botha a and b
None of the above

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Q. 6 of Quiz- (Que-ID : 2899)

A human female reaches menopause aroung the age of__ yrs

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Q. 25 of Quiz- (Que-ID : 2793)

The taxonomic unit ?Phylum? in the classification of animals is equivalent to which hierarchical level in classification of plants?

Class
Order
Family
Division

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Q. 7 of Quiz- (Que-ID : 431)

Which of the river Originates in Tibetan plateau, Enters India in J&K ?

Ganga
Bramaputra
Indus
Yamuna

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Q. 21 of Quiz- (Que-ID : 3064)

When one glucose molecule is completely oxidised, it changes:

36 ADP molecules into 36 ATP molecules
38 ADP molecules into 38 ATP molecules
30 ADP molecules into 30 ATP molecules
32 ADP molecules into 32 ATP molecules

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Q. 13 of Quiz- (Que-ID : 3056)

Which of the following acts as mobile carrier for transfer of electrons between complex III and complex IV?

Cytochrome c
cytochrome a3
cytochrome a
FADH2

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Q. 8 of Quiz- (Que-ID : 3226)

Potato tuber is an underground stem because

Tinospora
Jussiaea
Viscum
Vanda

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Q. 11 of Quiz- (Que-ID : 3254)

Which of the following is a pseudocoelomate?

Platyhelminthes
Aschelminthes
Mollusca
Hemi-chordates

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Q. 1 of Quiz- (Que-ID : 3927)

Feedback inhibition of enzymes is affected by which of the following

enzyme
substrate
end products
intermediate end products

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Q. 5 of Quiz- (Que-ID : 2798)

The generation of excitation-contraction coupling involves all the following events except

Generation of end-plate potential
Release of calcium from troponin
Formation of cross-linkages between actin and myosin
Hydrolysis of ATP to ADP

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Q. 6 of Quiz- (Que-ID : 3274)

Transgenic plants are the ones

Grown in artificial medium after hybridization in the field
Produced by a somatic embryo in artificial medium
Generated by introducing foreign DNA in to a cell and regenerating a plant from that cell
Produced after protoplast fusion in artificial medium