CBSE
Multiple Choice QuestionsAssertion : When six molecules ofcarbon dioxide participate in photosynthesis, 12 molecules of NADP and 18 ATP are used up, forming one hexose molecule.
Reason : The photosynthetic light reaction results in the formation of ATP and NADPH.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both the assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false.
If both the assertion and reason are false.
Sugarcane show high efficiency of CO2 fixation because of :
Calvin cycle
Hatch and Slack cycle
TCA cycle
greater sunlight
The first step in dark reaction of photosynthesis is :
formation of ATP
ionization of water
attachment of CO2 to a pentose sugar
excitement of electron of chlorophyll by a photon of light
Photosynthetic unit is :
glyoxysome
spherosome
microsome
quantasome
CO2 acceptor in CAM plants is in :
mesophyll cells
bundle sheath
both
none of the above
Core of chlorophyll is formed by
Fe
Mn
CH3
Mg
The photorespiratory carbon-oxidation cycle involves the interaction of
chloroplast
mitochondria
peroxisomes
all of these
In case of C4 plants the acceptor of CO2 is-
Phosphoglyceraldehyde
Ribulose monophosphate
Phosphoenol pyruvate
Ribulose diphosphate
The organelles, those take part in photorespiration are :
chloroplast and mitochondria
chloroplast, mitochondria and peroxisome
mitochondria and peroxisome
mitochondria only
Assertion : The collenchyma is a thick walled living tissue.
Reason : The collenchyma is thickened due to the deposition of pectin.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both the assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both the assertion and reason are false.
