Photorespiration shows formation of from Biology NEET Year 2012

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

1.

Which of the following is correct regarding respiration in adult frog

  • In water- Skin, gills

  • On land - Skin, buccal cavity

  • In water- Skin, buccal cavity

  • On land- Skin, lungs, gills


2.

Which of the following is correctly matched

  • Monstera- Fibrous root

  • Dahlin- Fasciculated root

  • Azadirachta- Adventitious root

  • Basil- Prop roots


3.

Deuteromycetes are known as fungi imperfecti because

  • their zygote undergoes meroblastic and holoblastic cleavage

  • only asexual stages are known

  • they have aseptate myceliun

  • they are autotrophic


4.

Abscisic acid is known as the stress hormone because it

  • breaks seed dormancy

  • induces flowering

  • promotes leaf fall

  • promotes closure of stomata


Advertisement
5.

One of the world's most poisonous fish toxins is released by

  • clown fish

  • eel fish

  • sword fish

  • puffer fish


6.

Na+/K+ pump is associated with

  • passive transport

  • active transport

  • osmosis

  • imbibition


Advertisement

7.

Photorespiration shows formation of

  • sugar but not ATP

  • ATP but not sugar

  • both ATP and sugar

  • neither ATP nor sugar


D.

neither ATP nor sugar

Photorespiration is the light dependent process of oxygenation of ribulose biphosphate (RuBP) and release of carbon dioxide by the photosynthetic organs of a plant. Normally photosynthetic organs do the reverse in the light, i.e., uptake of CO2 and release of O2 At high temperature, RuBP carboxylase functions as oxygenase and instead of fixing carbon dioxide (C4 cycle), oxidises ribulose 1, 5-biphosphate to produce a 3-carbon phosphoglyceric acid and a 2-carbon phosphoglycolate. Photorespiration does not produce energy or reducing power. Rather, it consumes energy. Further, it undoes the work of photosynthesis. There is 25% loss of fixed CO2. Therefore, photorespiration is a highly wasteful process. This happens only in case of C4 plants. C4 plants have overcome the problem of photorespiration.


Advertisement
8.

The microscope usually used for seeing living cells or tissues is

  • compound microscope

  • electron micrscope

  • phase contrast microscope

  • light microscope.


Advertisement
9.

Which of the following is correctly labelled

  • A: Reissner's membrane

  • B: Scala vestibuli

  •  C : Basilar membrane

  • D: Tectorial membrane


10.

In aerobic respiration, total number of ATP molecules formed from 1 glucose molecule is

  • 28

  • 32

  • 36

  • 30


Advertisement