Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Which of the following is wrongly matched?

  • T. O. Diener – Viroids are found to be a free DNA

  • W. M. Stanley – Crystallised proteins

  • M. W. Beijerinck – Contagium vivum fluidum

  • D. J. Iwanowsky – Microbes smaller than bacteria cause mosaic disease of tobacco

  • D. J. Iwanowsky – Microbes smaller than bacteria cause mosaic disease of tobacco


A.

T. O. Diener – Viroids are found to be a free DNA

T. O. Diener is known for the discovery of a new infectious agent which was smaller than viruses in 1971.


2.

Which of the following characters belong to the Kingdom Monera?

  • Eukaryotic

  • Heterotrophic

  • Multicellular

  • Presence of cell walls made of cellulose

  • Presence of cell walls made of cellulose


B.

Heterotrophic

The vast majority of bacteria in Kingdom- Monera are heterotrophs, that is, they depend on other organisms or on dead organic matter for food. Some bacteria are also autotrophic, that is, they synthesize their own food from inorganic substrates. They may be photosynthetic autotrophic or chemosynthetic autotrophic.


3.

Which one of the following is a very good pollution indicator?

  • Fungi

  • Slime moulds

  • Lichens

  • Euglenoids

  • Euglenoids


C.

Lichens

Lichens are known as a good pollution indicator. It is because they derive their water and essential nutrients mainly from the atmosphere rather than from soil.


4.

Of the following statements which are not relevant to Archaebacteria?

(A) They live in some of the most harsh habitats.

(B) They are present in the gut of several ruminant animals.

(C) They are characterized by the presence of a rigid cellulosic cell wall.

(D) They include mycoplasma.

(E) They are also referred to as blue-green algae.

  • (A), (B) and (C)

  • (A), (C) and (E)

  • (C), (D) and (E)

  • (A), (C) and (D)

  • (A), (C) and (D)


C.

(C), (D) and (E)

Among all the above statements, statement C, D and E are not relevant to Archaebacteria. Other statements can be corrected as-

  • Cellulosic cell wall is found only in plant cell. 
  • Blue green algae comes under eubacteria.


5.

In one plant, underground stems are modified to store food and in another plant, the stem tendrils develop from axillary buds to help plants climb. They are

  • Ginger, Cucumber

  • Carrot, Jasmine

  • Sweet potato, Bougainvillea

  • Opuntia, Eichhornia

  • Opuntia, Eichhornia


A.

Ginger, Cucumber

In ginger, rhizome is modified to store food and in cucumber, stem tendrils develop from axillary buds to help plants climb.


6.

Choose the correct statement

  • Members of phycomycetes are facultative parasites on plants

  • Fusion of protoplasms between two motile or non-motile gametes is called plasmogamy

  • Kingdom Plantae includes all eukaryotic chlorophyll containing organisms and non-chlorophyll organisms called plants

  • Trichoderma belongs to basidiomycetes

  • Trichoderma belongs to basidiomycetes


B.

Fusion of protoplasms between two motile or non-motile gametes is called plasmogamy

Among all the above statements, statement II is correct. Others can be corrected as:

  1. Memebers of phycomycetes are obligate parasites on plants.
  2. Kingdom Plantae includes all eukaryotic chlorophyll containing organisms only.
  3. Trichoderma belongs to Family Hypocreaceae.
  4. Chryosophytes include diatoms. Euglenoids consist of fresh water organisms found in stagnant water.


7.

Pick out the statement that does not apply to bryophytes

  • Includes the ferns and horsetails

  • Thallus is a gametophyte

  • Sporophyte shows foot, seta and capsule

  • Gemmae help in reproduction

  • Gemmae help in reproduction


A.

Includes the ferns and horsetails

Bryophytes include mosses and liver worts whereas the pteridophytes include horsetails and ferns.


8.

Match the following and choose the correct combination from the options given.

Column I Column II
A. Saprophytic protists 1. Trypanosoma
B. Golden algae 2. Plasmodium
C. Malarial parasite 3. Desmids
D. Sleeping sickness is caused by 4. Slime moulds

  • A - 1; B - 2; C - 3; D - 4

  • A - 2; B - 3; C - 4; D - 1

  • A - 4; B - 3; C - 2; D - 1

  • A - 3; B - 4; C - 2; D - 1

  • A - 3; B - 4; C - 2; D - 1


C.

A - 4; B - 3; C - 2; D - 1

Column I Column II
A. Saprophytic protists 4. Slime moulds
B. Golden algae 3. Desmids
C. Malarial parasite 2. Plasmodium
D. Sleeping sickness is caused by 1. Trypanosoma

9.

Consider the following statements

(A) In leguminous plants, leaf base becomes swollen, called pulvinus

(B) The fleshy leaves of onion and garlic store food

(C) The buds in Australian Acacia tree become green and synthesise food

(D) In Alstonia, leaves show alternate phyllotaxy

Of the above statements

  • (B) and (D) are correct

  • (A) and (C) are correct

  • (A) and (B) are correct

  • (A) and (D) are correct

  • (A) and (D) are correct


C.

(A) and (B) are correct

Among all the given statements, statement A and B are correct. Alstonia leaves show whorled phyllotaxy. In Australian Acacia, the leaves are small and short-lived. The petioles in these plants expand, become green and synthesise food.


10.

Match Column I with Column II and choose the right option.

Column I Column II
A. Claviceps 1. Deuteromycetes
B. Puccinia 2. Ascomycetes
C. Trichoderma 3. Basidiomycetes

  • A - 3; B - 1; C - 2

  • A - 2; B - 3; C - 1

  • C - 1; B - 3; C - 2

  • A - 3; B - 2; C - 1

  • A - 3; B - 2; C - 1


B.

A - 2; B - 3; C - 1

Column I Column II
A. Claviceps 2.  Ascomycetes
B. Puccinia 3. Basidiomycetes
C. Trichoderma 1. Deuteromycetes