Multiple Choice QuestionsThe 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
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
D.
oxidative phosphorylation
An electron transport chain (ETC) is a series of complexes that transfer electrons from electron donors to electron acceptors via redox (both reduction and oxidation occurring simultaneously) reactions, and couples this electron transfer with the transfer of protons (H+ ions) across a membrane.
The efficiency of oxidative phosphorylation is 40% higher than any other energy conversion system. It is one of the key processes in respiration in which the energy extracted from food is trapped and made available to the living cells.
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
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