Multiple Choice QuestionsLimit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste water into natural surface water, is:
< 3.0 ppm
< 10 ppm
< 100 ppm
< 100 ppm
Withdrawal of which of the following hormones is the immediate cause of menstruation?
Eastrogens
FSH
FSH-RH
FSH-RH
The arrangement of the nuclei in a normal embryo sac in the dicot plants is
2+4+2
3+2+3
2+3+3
2+3+3
An enzyme that can stimulate germination of barley seeds is
α-amylase
lipase
protease
protease
In a cereal grain the single cotyledon of embryo is represented by
coleorhiza
scutellum
prophyll
prophyll
Triticale, the first man-made cereal crop, has been obtained by crossing wheat with
rye
pearl millet
sugarcane
sugarcane
In order to obtain virus-free plants through tissue culture the best method is
protoplast culture
embryo rescue
anther culture
anther culture
D.
anther culture
In meristem culture, the shoot apical meristem alongwith some surrounding tissue is grown in vitro. It is used for clonal propagation and recovery of virus free plants. It is also potentially useful in germ plasma exchange and long term storage of germ plasma through freeze preservation.
HIV that causes AIDS, first starts destroying
B-lymphocytes
leucocytes
thrombocytes
thrombocytes
Sickle cell anaemia has not been eliminated from the African population because
it is controlled by recessive genes
it is not a fatal disease
it provides immunity against malaria
it provides immunity against malaria
Both sickle cell anaemia and Huntington's chorea are
bacteria-related diseases
congenital disorders
pollutant-induced disorders
pollutant-induced disorders
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