Multiple Choice QuestionsPhotorespiration usually occurs in
one cell organelle
two cell organelles
three cell organelles
four cell organelles
Stomata opens
in day time - for gaseous exchange
in day time- no gaseous exchange
in night time only - for gaseous exchange
in night time only - no gaseous exchange
Which of the following statements about phytochrome is true?
Pr absorbs yellow light and becomes Pfr
Pr absorbs red light and becomes Pfr
Pfr absorbs red light and becomes Pr
Pfr absorbs yellow light and becomes Pr
Which of the following statements is correct regarding short day plants (SDPs)?
They can flower in complete darkness if supplied with exogenous nutrients.
They are the same as long day plants.
They do not have a critical photoperiod
All of these.
Assertion : Stomata remain open during day.
Reason : Stomata help in exchange of gases.
If both Assertion and Reason are true and Reason is the correct explantion of Assertion
If both Assertion and Reason are true and Reason is not the correct explanation of Assertion
If Assertion is true but Reason is false
If Assertion is false but Reason is true.
B.
If both Assertion and Reason are true and Reason is not the correct explanation of Assertion
The opening and closing of stomata is a function of turgor changes in guard cells.
In light, malic acid is produced in guard cells which dissociates into hydrogen and malate ions resulting in intake of K+ ions through H+ - K+ ion exchange. There is increase in concentration of K+ and malate ions in guard cells, endosmosis of water into guard cells occurs resulting in increased turgor pressure which results in stomatal opening. These are concerned with gaseous exchange during photosynthesis and respiration and water loss through transpiration.
Which of the following statements regarding cyclic flow of electrons during light reactions is false?
This process takes place in the stromal lamella
ATP synthesis takes place
NADPH + H+ is synthesized
Takes place only when light of wavelength beyond 680 nm is available for excitation
Takes place only when light of wavelength beyond 680 nm is available for excitation
Find out the mismatched pair
C4 plants - Kranz anatomy
Primary CO2 fixation product of C4 plants - OAA
Primary CO2 acceptor of C3 plants - RuBP
Calvin pathway of C4 plants occur in - Bundle sheath
Calvin pathway of C4 plants occur in - Bundle sheath
Switch
