Which of the following is correct? from Biology NEET Year 2010 F

Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Vitamin B6 is also called

  • thiamine

  • pantothenic acid

  • pyridoxine

  • retinol


2.

Protista differs from monera in having

  • cell wall

  • autotrophic nutrition

  • flagella

  • nuclear membrane


3.

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.


4.

Who invented electron microscope?

  • Janssen

  • Edison

  • Knoll and Ruska

  • Landsteiner


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5.

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


6.

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

  • Pteridophytes

  • Angiosperms

  • Gymnosperms

  • Bryophytes


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7.

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

Parietal cells are present in the epithelium of the gastric glands. They are large and are present on the side walls of the glands. They are also called oxyntic cells as they stain strongly with eosin. They secrete hydrochloric acid and Castle intrinsic factor.


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8.

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.


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9.

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


10.

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

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