The plants respond to photoperiods due to the presence of :
enzymes
stomata
phytochromes
phytohormones
Mesophyll cells, which liberate malic acid at night time, are of :
C4 - plants
C3 - plants
C2 - plants
C1 - plants
Photorespiration in C3 -plants starts from :
glycine
glycerate
phosphoglycolate
phosphoglycerate
C.
phosphoglycolate
Photorespiration in C3 -plants starts from phosphoglycolate. Phosphoglycolate is formed in chloroplast which represents the source of carbon dioxide released in photorespiration. Its phosphate group is first hydrolyzed away by a specific phosphatase found in chloroplasts of C3 -plants releasing Pi and glycolic acid. The glycolate then moves out of chloroplasts into the adjacent peroxisomes.
The name of process of aerobic respiration, in which energy is provided in steps in electron transport chain, is :
EMP-pathway
decarboxylation
photophosphorylation
oxidative phosphorylation
Asthma is caused due to :
infection of lungs
infection of trachea
bleeding into pleural cavity
spasm in bronchial muscles
A person breathing normally at rest, takes in and expels approximately half a litre of air during each respiratory cycle. This is called :
tidal volume
vital capacity
inspiratory reserve volume
expiratory reserve volume
The first heart sound is produced when :
diastole begins
semilunar valve close quickly
interventricular pressure decreases
bicuspid and tricuspid valve close quickly