Mesophyll cells, which liberate malic acid at night time, are of :
C4 - plants
C3 - plants
C2 - plants
C1 - plants
A.
C4 - plants
The plants in which first stable product for the initial CO2 fixation in dark reaction, is malic acid are known as C4 -plants. During night time, carbon dioxide combines with phosphoenol pyruvic acid (PEPA) to form oxaloacetic acid in mesophyll chloroplasts which converts to malic acid.
The plants respond to photoperiods due to the presence of :
enzymes
stomata
phytochromes
phytohormones
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
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
Asthma is caused due to :
infection of lungs
infection of trachea
bleeding into pleural cavity
spasm in bronchial muscles
The first heart sound is produced when :
diastole begins
semilunar valve close quickly
interventricular pressure decreases
bicuspid and tricuspid valve close quickly
