Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

A substance that induces dormancy of seed is

  • ABA

  • GA

  • thio-urea

  • cytokinin


12.

Plants purify air by which process?

  • Photorespiration

  • Photosynthesis

  • Photophosphorylation

  • Transpiration


13.

One of the characteristic of sieve tube is

  • it is a part of phloem

  • function is transport of inorganic solutes

  • it is dead cell

  • sieve plate is not present


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14.

Chromosomes replicate in which stage of meiosis?

  • Prophase- I

  • Prophase- II

  • Telophase- I

  • Interphase


D.

Interphase

Interphase is a phase of cell cycle where cell prepares itself for division. It consists of 3 phases: G1 phase, S phase and G2 phase.

During S or Synthesis phase, all the chromosomes get replicated. Each chromosome consists of two sister chromatids.

In eukaryotic DNA, histone and non- histone proteins are known as chromatin. It consists of thread- like structures known as chromosomes. Hence, the replication of DNA in the chromosomes initiates in S- phase of interphase.


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15.

Which one of the following statement correctly define the term homonym?

  • Identical name of two different taxon

  • Two or more names belonging to the same taxon

  • When species name repeats the generic name

  • Other name of a taxon given in a language other than the language of zoological/ botanical nomenclature


16.

Which of the following is called stress hormone?

  • Abscisic acid

  • Auxin

  • Cytokinin

  • Gibberellic acid


17.

Dimorphism of chloroplast is found in

  • C3 - plants

  • C4 - plants

  • CAM plants

  • Both (b) and (c)


18.

Which of the following element is responsible for Minamata disease?

  • Hg

  • Pb

  • Cd

  • Fe


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19.

The Gram (-) bacteria detect and respond to the chemicals in their surroundings by

  • muramic acid

  • lipopolysaccharide

  • volutin granules

  • porin


20.

Mesoglia is seen in between

  • ectoderm and endoderm

  • ectoderm and mesoderm

  • mesoderm and endoderm

  • just below mesoderm


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