Which of the following contraceptive devices make uterus unsuitable for implantation?
Progestasert
CuT
Lippe's loop
Multiload
In Miller's experiment, he used a mixture of CH4, NH3, H2 and water vapour in a closed flask to mimic early earth conditions. What was the temperature at which this flask was kept?
800C
1200
200C
400C
A.
800C
Initially, Oparin and Haldane proposed that first form of life could have come from pre- existing non- living organic molecules. The conditions were high temperature, volcanic eruption , storms, reducing atmosphere consisting of CH4, NH3 etc. Later in 1953, Miller created similar conditions in a laboratory and created an electric discharge in a closed flask containing CH4, H2 and NH3 and water vapour at 800C.
Sexual stage (gametocytes) of Plasmodium occurs in
Salivary glands of mosquito
Human RBC
Intestine of mosquito
Human liver
Sporopollenin is a constituent of pollen exine. It can be degraded by the action of
enzymes
high temperature
strong acids
cannot be degraded
After doble fertilization, a mature ovule has
1 diploid and 1 haploid cell
1 diploid and 1 triploid cell
2 haploid and 1 triploid cell
1 haploid and 1 triploid cell
Genetically modified (GM) crops can be produced by
recombinant DNA technology
somatic hybridization
cross breeding
micropropogation
Which of the following is a palindromic sequence?
5' - CGTATG - 3'
3' - GCATAC - 5'
5' - CGAATG - 3'
3' - CGAATG - 5'
5' - GAATTC - 3'
3' - CTTAAG - 5'
5' - GACTAC - 3'
3' - TACGAC - 5'
Which of the following is true for a recessive disease in Family A and B?
In family A, both the parents are homozygous recessive
In family B, both the parents are heterozygous dominant.
In family B, both the parents are heterozygous recessive
In family A, both the parents are heterozygous recessive.
Which of the following is not true for inbreeding?
It causes inbreeding depression after a few generations
It always increases the productivity.
It is used to produce a pure line.
It leads to homozygosity