Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Who invented electron microscope?

  • Janssen

  • Edison

  • Knoll and Ruska

  • Landsteiner


C.

Knoll and Ruska

Who invented electron microscope?


2.

Protista differs from monera in having

  • cell wall

  • autotrophic nutrition

  • flagella

  • nuclear membrane


D.

nuclear membrane

Protista differs from monera in having


3.

What is correct about the movement of substance across the membrane in facilitated diffusion?

  • It is an active transport

  • It doesn't cause transport of molecules from low concentration to high concentration

  • It is insensitive to inhibitors

  • It is a very specific transport


D.

It is a very specific transport

What is correct about the movement of substance across the membrane in facilitated diffusion?


4.

Which of the following is correct about the given figure?

  • The length ofthe thick and thin myofilaments has changed.

  • Length of both anisotropic and isotropic band has changed.

  • The myosin cross-bridges move on the surface of actin and the thin and thick myofilaments slide past each other.

  • Length of the sarcomere remains same.


C.

The myosin cross-bridges move on the surface of actin and the thin and thick myofilaments slide past each other.

Which of the following is correct about the given figure?


5.

Vitamin B6 is also called

  • thiamine

  • pantothenic acid

  • pyridoxine

  • retinol


C.

pyridoxine

Vitamin B6 is also called


6.

What do A, B, C and D represent in the following figure?

  • A : carrier protein, B: symport, C: uniport, D : antiport

  • A : carrier protein, B : uniport, C: antiport, D : symport

  • A: carrier protein, B: antiport, C: symport, D : uniport

  • A : carrier protein, B: uniport, C: symport, D : antiport


B.

A : carrier protein, B : uniport, C: antiport, D : symport

What do A, B, C and D represent in the following figure?


7.

Gametophyte and sporophyte are independent of each other in which of the following groups?

  • Pteridophytes

  • Angiosperms

  • Gymnosperms

  • Bryophytes


A.

Pteridophytes

Gametophyte and sporophyte are independent of each other in which of the following groups?


8.

Why are vascular bundles closed in monocots?

  • Xylem and phloem are present.

  • Xylem and phloem occur in separate bundles.

  • Vascular cambium is present between xylem and phloem.

  • Vascular cambium is not present.


D.

Vascular cambium is not present.

Why are vascular bundles closed in monocots?


9.

Refer the given figures on photoperiodism and select the correct option.

  • A B C
    no correlation between light period and flowering long light- exposure period short light- exposure period
  • A B C
    long light- exposure period no correlation between light period and flowering short light- exposure period
  • A B C
    short light exposure period long light exposure period no correlation between light period and flowering
  • A B C
    no correlation between light period and flowering short light exposure period long light exposure period

C.

A B C
short light exposure period long light exposure period no correlation between light period and flowering

Refer the given figures on photoperiodism and select the correct option.


10.

Which of the following is correct?

  • Paneth cells secrete pepsinogen

  • Parietal cells secrete hydrochloric acid

  • Argentaffin cells secrete mucus

  • Chief cells secrete gastrin


B.

Parietal cells secrete hydrochloric acid

Which of the following is correct?