(c) archaebacteria that contain a monolayer of branched
chain lipids in the cell membrane.
(d) archaebacteria that possess histones resembling those
found in eukaryotes but whose DNA is negatively
supercoiled.
- Which one is correct sequence of urine formation?
(a) Secretion, reabsorption, filtration
(b) Filtration, reabsorption, secretion
(c) Reabsorption, filtration, secretion
(d) Reabsorption, secretion, filtration
- Ulothrix can be described as a
(a) filamentous alga lacking flagellated reproductive stages
(b) membranous alga producing zoospores
(c) filamentous alga with flagellated reproductive stages
(d) non-motile colonial alga lacking zoospores.
- Non-cellular layer that connects inner surface of the epithelial
tissue to the connective tissue is
(a) basement membrane (b) epidermis
(c) dermis (d) either (b) or (c).
- Antigen binding site in an antibody is found between
(a) two light chains
(b) two heavy chains
(c) one heavy and one light chain
(d) either between two light chains or between one heavy
and one light chain depending upon the nature of
antigen.
- In double fertilisation
(a) two male gametes fuse with two eggs
(b) one male gamete fuses with the egg and the other
fuses with the secondary nucleus
(c) one male gamete fuses with the egg and the other
fuses with the antipodal
(d) one male gamete fuses with the antipodal and the
other fuses with the diploid nucleus.
- If in a population, natality is balanced by mortality then there
will be
(a) decrease in population growth
(b) zero population growth
(c) increase in population growth
(d) over population.
- Which of the following is not an effect of the sympathetic
nervous system?
(a) Dilation of pupil
(b) Reduction of peristalsis
(c) Elevation of blood pressure
(d) Stimulation for saliva secretion
- Mammalian lungs have an enormous number of minute
alveoli (air sacs). This is to allow
(a) more surface area for diffusion of gases
(b) more space for increasing the volume of inspired air
(c) more nerve supply to keep the lungs working
(d) more spongy texture for keeping lung in proper shape.
33. Biolistic technique is used in
(a) tissue culture
(b) gene transfer
(c) hybridisation process
(d) germplasm conservation.
34. Study the given flow chart and identify A and B.
Biological
N fixation 2
Industrial
N fixation 2
Electrical
N fixation 2
NH 3 NO 2
Soil
Uptake
Decaying biomass Plant biomass
Animal biomass
Atmospheric N 2
A
B
A B
(a) Mineralisation Demineralisation
(b) Ammonification Denitrification
(c) Denitrification Ammonification
(d) Denitrification Mineralisation
- Populations are said to be sympatric when
(a) two populations live together and freely interbreed to
produce sterile offspring
(b) two populations are physically isolated by natural
barriers
(c) two populations are isolated but occasionally come
together to interbreed
(d) two populations share the same environment but
cannot interbreed.
- The conidiophores of Pencillium are
(a) uninucleate and colourless
(b) uninucleate and pigmented
(c) nucleate and colourless
(d) anucleate and pigmented.
- The flower shown in the following diagram is
(a) homochlamydeous, unisexual and hypogynous
(b) homochlamydeous, bisexual and epigynous
(c) dichlamydeous, bisexual and hypogynous
(d) heterochlamydeous, bisexual and epigynous.
