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.
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
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
