Intercalated discs are characteristic of muscles found in from B

Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Stinging capsules (nematocysts) are found in

  • wasp and honeybee

  • scorpion and cobra

  • sea pen and sea fan

  • cactus and Venus flytrap


2.

India is one of the twelve megadiversity countries with of genetic resources of the world

  • 12.1%

  • 18.1%

  • 38.1%

  • 8.1%


3.

Which of the following is not an invasive species?

  • Parthenium hysterophorus

  • Nelumbo (lotus)

  • Lantana camara

  • Eichhornia crassipes


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4.

Intercalated discs are characteristic of muscles found in

  • heart

  • thigh

  • urinary bladder

  • stomach


A.

heart

Cardiac muscle fibres are found in the wall of heart. They have dark intercalated discs at intervals. These are the specialized regions of cell membranes of two adjacent fibres. They permit the wave of muscle contraction to be transmitted from one cardiac fibre to another.


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5.

In which of the following sets of organisms, does the external fertilization occur?

  • Echinodermata and mosses

  • Hemichordata and ferns

  • Amphibians and algae

  • Reptiles and gymnosperms


6.

Occurrence of triploid (3n) primary endosperm nucleus is a characteristic feature of

  • Algae

  • Gymnosperms

  • Angiosperms

  • Bryophytes


7.

From the following groups, select the one which has only secondary metabolites?

  • Arbrin, cellulose, arginine, tyrosine

  • Glycine, gums, serine, diterpenes

  • Carotenoids, phenylalanine, curcumin, rubber

  • Conclavin-A, morphine, codeine, vinblastin


8.

In a diploid cell, at which stage of cell cycle, the amount of DNA is doubled?

  • G1 and G2 phase

  • G0 phase

  • S, G2 and M phase

  • S phase


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9.

C4 plants have better productivity because

  • C4 plants absorb more light

  • C4 plants absorb more CO2

  • C4 plants does not carry photorespiration

  • C4 plants have more amount of RuBisCO


10.

Match the source gland with its respective hormone and function and select the correct option.

  • Source gland Hormone Function
    Anterior pituitary Oxytocin Contraction of uterine muscle
  • Source gland Hormone Function
    Anterior pituitary Vasopressin Induces reabsorption of water in nephron
  • Source gland Hormone Function
    Thymus Thymosin Proliferation of T- lymphocytes
  • Source gland Hormone Function
    α- cells of islets of Langerhans Glucagon Uptake of glucose into the cell

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