Subject

Biology

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 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


14.

Chromosomes replicate in which stage of meiosis?

  • Prophase- I

  • Prophase- II

  • Telophase- I

  • Interphase


Advertisement
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


Advertisement
Advertisement

19.

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

  • muramic acid

  • lipopolysaccharide

  • volutin granules

  • porin


D.

porin

In cell wall of Gram-negative bacteria, the peptidoglycan layer is very thin. The outer membrane is a bilayered structure consisting chiefly of phospholipids, proteins and lipo-polysaccharides. The permeability of outer membrane to nutrients is provided by proteins called porins, which form channels in the membrane.


Advertisement
20.

Mesoglia is seen in between

  • ectoderm and endoderm

  • ectoderm and mesoderm

  • mesoderm and endoderm

  • just below mesoderm


Advertisement