Multiple Choice QuestionsWhich one of the followings is the functional unit of hearing?
Utricle
Organ of Zuckerkandl
Organ of Corti
Vestibular apparatus
Which one of the followings is not a refractive medium of the eye?
Lens
Vitreous humour
Aqueous humour
Pupil
Vernalisation promotes flowering by
low temperature
high temperature
prolonged photoperiod
short photoperiod
C4 pathway is advantageous over C3 pathway in plants as it
occurs in relatively low CO2 concentration
uses more amount of water
occurs in relatively low O2 concentration
is less efficient in energy utilisation
A.
occurs in relatively low CO2 concentration
Plants with the C4 pathway has many advantages over a plant with a C3 pathway. When the weather is hot, acid, dry, the leaves close their stomata to eliminate water less whereas in C3 plants this closure results in low carbon dioxide concentrations and ultimately both loss of RuBP and inhibition of the Calvin-Benson cycle by photorespiration.
There are no such disadvantages in a C4 plant during hot, dry weather. Even with its stomata are closed, carbon dioxide is fixed because of the efficiency of REP carboxylase in trapping and concentrating carbon dioxide. Consequently, the Calvin-Benson cycle continues to produce glucose and there is no loss of chemical energy through photorespiration.
TCA cycle enzymes are located in
cristae
outer membrane
mitochondrial matrix
mitochondrial intermembrane space
Which one of the following statements is incorrect?
Insects have one pair of antenna
Millipeds possess two pairs of appendages in each segment of the body
Prawns have two pairs of antenna
Animals belonging to the phylum- Porifera have nematocys
Which one of the followings is not a characteristic feature of mammals?
Diphyodont tooth
Ten pairs of cranial nerves
Seven cervical vertebrae
Left aortic arch in the circulatory system
The eukaryotic cells have all of the followings except
peptidoglycan in the cell wall
the 80 S ribosome
nuclear membrane
mitochondria
Which of the followings does not occur in the interphase of eukaryotic cell division?
Increase of ATP synthesis
Increase of DNA synthesis
Increase of RNA synthesis
Reduction in cell size
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