Assertion: Photorespiration is a wasteful process where there is no synthesis of ATP energy.
Reason: RuBisCO is present in mesophyll cells of C4 plants hence they show more productivity.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
C.
If assertion is true but reason is false.
Photorespiration does not produce energy or reducing power. Rather it consumes energy. In C4 plants, photorespiration, does not occur. Here, RuBisCO is located only in bundle sheath cells where photosynthetic release of oxygen does not occur. Bundle sheath cells have a high intracellular concentration of CO2 due to flow of C4 acids and their decarboxylation to release CO2. Therefore, RuBisCO functions purely as carboxylase in C4 plants. They show high productivity and hence higher yield.
The checkpoint in cell cycle plays important role in
repairing DNA damage
apoptosis initiation
assessing DNA damage
none of these
C4 plants have better productivity because
C4 plants absorb more light
C4 plants absorb more CO2
C4 plants lack photorespiration
all of these
Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that
nerve fibre is insulated by a medullary sheath
sodium pump starts operating only at the cyton and then continues into the nerve fibre
neurotransmitters are released by dendrites and not by axon endings
neurotransmitters are released by the axon endings and not by dendrites.
Wharton's duct is the duct of
submandibular salivary gland
parotid gland
sublingual gland
all of these
Achondroplasia is a disease related with the defect in the formation of
membrane
cartilage
mucosa
none of these
Pick the correct group consisting of all genera exhibiting homospory
Lycopodium, Psilotum, Selaginella, Equisetum
Equisetum, Pteris, Salvinia, Psilotum
Salvinia, Pteris, Lycopodium, Selaginella
Equisetum, Psilotum, Lycopodium, Pteris
An artificial pacemaker is implanted subcutaneously and connected to the heart in patients
having 90% blockage of the three main coronary arteries
having a very high blood pressure
with irregularity in the heart rhythm
suffering from arteriosclerosis
Which part of the nephron is impermeable to water
Proximal convoluted tubule
Distal convoluted tubule
Ascending limb of loop of Henle
Descending limb of loop of Henle
Pacinian corpuscles occur in the skin of certain parts of body in mammals. These are
type of glands
pain receptors
naked tactile receptors
encapsulated pressure receptors.
