Life Science : (System Physiology Plants) - Attempt Quiz Here!

By Astha Singh|Updated : July 18th, 2022

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Multiple Choice Questions On System Physiology Plants

Question 1. 

What are the tiny molecules of naked circular RNA that infect plants?
  1. Prions
  2. Viroids
  3. RNA viruses
  4. Tobacco mosaic virus
 Question 2. 
The role of salicylic acid in systemic acquired resistance of plants is to:
  1. directly destroy the pathogens
  2. activate defence throughout the plant before the infection spreads
  3. activate heat shock proteins
  4. sacrifice the infected tissue
Question 3. 
Identify the correct statements.
A. Bundle sheath containing chloroplast present in C4 plants
B. Annual rings differentiate into barks and woods
C. Sap wood is important for biological functions, and the heartwood is economically important as it contains gums, resins, oils, tannins, etc.
D. Clonal propagation leads to somaclonal variation
  1.  a, b
  2. b, c
  3. c,d 
  4. d, a
Question 4. 
If a plant embryo failed to form enough ground tissue, what function(s) would likely be directly affected in the corresponding mature plant?
  1. seed formation
  2. meristem development
  3. cotyledon formation
  4. food and water storage 
Question 5. 
Which one of the following describes the function of silicon in plants?
  1. Constituent of amino acids
  2. Contributions to cells were rigidity and elasticity.
  3. Constituent of the photosynthesis reaction centre
  4. Maintenance of cell turgor and electro neutrality
 Question 6. 
Blue light receptor cry 1 binds to COP1 and SPA1 complex by interacting with the C-terminal region of cry 1 (CCT) in a light-dependent manner and regulates photomorphogenesis via transcription factor HY5. Read the following statements:

A) cry 1 bind to COP1 and SPA1 complex leading to degradation of HY5

B) cry 1 bind to COP1 and SPA1 complex and prevents degradation of HY5

C) CCT is overexpressed, and the plants are kept in the dark.

D) CCT is overexpressed, and the plants are kept in the light.

Which of the following combination of the above statements will result in photomorphogenesis?

  1. Only a
  2. only b
  3. A, B and C
  4. B, C and D
 Question 7. 
 Recalling Joseph Priestley's famous experiment in which a sprig of mint saved the life of a mouse in a sealed chamber, you decide to do an analogous experiment to see how a C3 and a C4 plant do when confined together in a sealed environment.
You place a corn plant (C4) and a geranium (C3) in a sealed plastic chamber with normal air (300 parts per million CO2) on a windowsill in your laboratory.
Which of the following outcome is likely to be true?
  1. The corn plant (C4) would survive, but the geranium (C3) plant would die
  2. The geranium (C3) plant would survive, but the corn plant (C4) would die
  3. Both the plants will survive over time
  4. Both plant will not survive over a longer period of time.
 Question 8. 
Which of the statements about the quiescent centre is NOT true?
  1. This occupies the central position in root meristem
  2. This is present in apical and as wcl1as lateral root meristem
  3. This connects to all initial cells of root meristem
  4. These is the most actively dividing cells in root meristem 
 Question 9. 
 Match the secondary metabolites with their precursors
 Group I (Secondary metabolite)
 P. Coniine
 Q. Morphine
 R. Quinine
 S. Chalcone
Group 2 (Precursor)
 1) Tryptophan
 2) Phenyl alanine
 3) Lysine
 4) Tyrosine
 5) Ornithine
 6) Agmatine
  1. P-1 Q-5 R-3 S-4
  2. P-3 Q-4 R-1 S-2
  3. P-2 Q-1 R-2 S-3
  4. P-4 Q-3 R-6 S-5
Answer Key For System Physiology Plants
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