Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Which of the following is correct regarding respiration in adult frog

  • In water- Skin, gills

  • On land - Skin, buccal cavity

  • In water- Skin, buccal cavity

  • On land- Skin, lungs, gills


2.

Which of the following is correctly matched

  • Monstera- Fibrous root

  • Dahlin- Fasciculated root

  • Azadirachta- Adventitious root

  • Basil- Prop roots


3.

Deuteromycetes are known as fungi imperfecti because

  • their zygote undergoes meroblastic and holoblastic cleavage

  • only asexual stages are known

  • they have aseptate myceliun

  • they are autotrophic


4.

Abscisic acid is known as the stress hormone because it

  • breaks seed dormancy

  • induces flowering

  • promotes leaf fall

  • promotes closure of stomata


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5.

One of the world's most poisonous fish toxins is released by

  • clown fish

  • eel fish

  • sword fish

  • puffer fish


6.

Na+/K+ pump is associated with

  • passive transport

  • active transport

  • osmosis

  • imbibition


7.

Photorespiration shows formation of

  • sugar but not ATP

  • ATP but not sugar

  • both ATP and sugar

  • neither ATP nor sugar


8.

The microscope usually used for seeing living cells or tissues is

  • compound microscope

  • electron micrscope

  • phase contrast microscope

  • light microscope.


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9.

Which of the following is correctly labelled

  • A: Reissner's membrane

  • B: Scala vestibuli

  •  C : Basilar membrane

  • D: Tectorial membrane


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10.

In aerobic respiration, total number of ATP molecules formed from 1 glucose molecule is

  • 28

  • 32

  • 36

  • 30


C.

36

The net gain from complete oxidation of a glucose molecule in aerobic respiration is 36 ATP molecules. 10 molecules of NADH, (2 from Glycolysis + 8 from Krebs' cycle) yield = 10 x 3= .30 ATP, 2 molecules of FADH, yield = 2x 2 = 4 ATP and glycolysis also yields 2 ATP. Therefore, total release of ATP per hexose will be = 30 + 4 + 2 = 36 ATP.


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