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
B.
chloroplast and peroxisome
Photorespiration is a light dependent phenomenon of oxygenation of RuBP and release of CO2 by the photosynthetic organs of a plant. The site of photorespiration is chloroplast.
Phosphoglycolate produced by RuBP oxygenase activity is converted to glycolate by phosphoglycolate phosphatase in the chloroplast. Glycolate then enters the peroxisomes and is converted to glyoxylate by glycolate oxidase.
Apart from chloroplast and peroxisomes, mitochondria is also involved in the photorespiratory process.
Opening and closing of stomata is controlled by
abscisic acid
CO2 concentration
O2 concentration
light intensity
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
Chlorophyll molecules are located in the
thylakoid membrane
thylakoid lumen
stroma
inner chloroplast membrane
In a CAM plant, the concentration of organic acid
increases during the day
decreases or increases during the day
increases during night
decreases during any time
Identify the membrane across which the proton (H+) gradient facilitates ATP synthesis in a typical eukaryotic cell
plasma membrane
mitochondrial inner membrane
mitochondrial outer membrane
nuclear membrane
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
Chloroplast dimorphism is a characteristic feature of
plants with Calvin cycle
C4 -plants
all plants
only in algae
In which type of reactions related to plant photosynthesis peroxisomes are involved?
Glycolate cycle
Calvin cycle
Bacterial photosynthesis
Glyoxylate cycle
