class-11th MCQs with Explanations - Chapter-wise Practice Questions

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. 7 of Quiz- (Que-ID : 3175)

The vascular tissue of blood is made up of

RBC
plasma
platelets
all of the above

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Q. 20 of Quiz- (Que-ID : 3263)

Order Rhynchocephalia consists of

Tuataras
Lizards and snakes
Turtles and tortoises
Crocodiles, alligators, caimans

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Q. 24 of Quiz- (Que-ID : 2817)

Which among is faster impulse transmission

Chemical
Both
Electrical
None of these

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Q. 15 of Quiz- (Que-ID : 2683)

Which blood group lacks antigens

A
B
O
AB

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Q. 16 of Quiz- (Que-ID : 3034)

Which plant growth regulator is the derivative of carotenoids?

Auxin
Gibberelic acid
Cytokinin
Abscisic acid

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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. 15 of Quiz- (Que-ID : 3008)

Which of the following cellular structures always disappears during mitosis and meiosis?

Plasma membrane
Nucleolus and nuclear envelope
Plastids
none of these

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Q. 18 of Quiz- (Que-ID : 2661)

How many percent of co2 is carried as bicarbonate

50
97
70
25

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Q. 22 of Quiz- (Que-ID : 2690)

What?s meaning of systole

Relaxation
Contraction
Both a and b
None of the above

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Q. 1 of Quiz- (Que-ID : 3269)

Rhodophyceae is called red algae because of the pigment

Fucoxanthin
Phycoerythrin
Carotenoids
Chlorophyll c

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Q. 14 of Quiz- (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. 5 of Quiz- (Que-ID : 3098)

The formation of first stable product of nitrogen fixation is catalysed by enzyme

dehydrogenase
nitrogenase
isomerase
none of these

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Q. 19 of Quiz- (Que-ID : 2787)

Identify the incorrect match.

Physiology ? Study of functions and processes of life
Pedology ? Soil science
Limnology ? Study of fresh water
Kinesiology ? Fossil study

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Q. 23 of Quiz- (Que-ID : 3041)

Formation of seedless fruit without act of fertilisation

Parthenocarpy
pseudocarpy
Apomixis
Parthenogenesis

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Q. 1 of Quiz- (Que-ID : 2969)

Which among the following is not ammonotelic

Aquatic amphibian
Aquatic insect
Bony fishes
Mammal

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