Multiple Choice QuestionsChlorophyll molecules are located in the
thylakoid membrane
thylakoid lumen
stroma
inner chloroplast membrane
The correct sequence of organelles in which glycolate and glyoxylate are produced sequentially in photorespiration is
chloroplast and mitochondria
chloroplast and peroxisome
peroxisome and mitochondria
peroxisome and chloroplast
Identify the correct statements in relation to C4 photosynthesis.
Kranz anatomy is an essential feature for C4 plants
C4 plants have higher water use efficiency than C3 plants
Photorespiration can be minimised when C3 pathway is in operation
Conversion of oxaloacetate to malate occurs in the bundle sheath cells
A.
Kranz anatomy is an essential feature for C4 plants
B.
C4 plants have higher water use efficiency than C3 plants
C.
Photorespiration can be minimised when C3 pathway is in operation
C4 photosynthesis is the type of biochemical mechanisms (along with C3 and CAM) of photosynthesis used in carbon fixation. The leaves of C4 plants contains two types of chloroplasts, i.e., mesophyll chloroplast and bundle sheath chloroplast. This is known as Kranz anatomy. C4 plants also have higher water use efficiency than C3 plants. Also, if the C4 pathway is in operation in plants, the photorespiratory pathway tend to get minimised.
C4 pathway is advantageous over C3 pathway in plants as it
occurs in relatively low CO2 concentration
uses more amount of water
occurs in relatively low O2 concentration
is less efficient in energy utilisation
Opening and closing of stomata is controlled by
abscisic acid
CO2 concentration
O2 concentration
light intensity
As compared to sun plants, the plants, which are adopted to low light intensity possess
more extended root system
very high rate of CO2 fixation
larger photosynthetic units
more extended shoot system
Oxygen released in photosynthesis comes outby
photophosphorylation
photolysis of water
photorespiration
Kelvin cycle
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