Identify the structure that undergoes 2nd meiotic division during the process of spermatogenesis.
Anonymous Quiz
77%
Secondary spermatocyte
10%
Spermatids
10%
Primary spermatocyte
3%
Spermatozoa
The number of moles of hydrogen molecules required to produce 20-mole ammonia through
Haberβs Process is
Haberβs Process is
Anonymous Quiz
11%
10
15%
20
68%
30
6%
40
The law of multiple proportion was proposed by
Anonymous Quiz
27%
Lavoisier
36%
Dalton
24%
Proust
13%
Gay-Lussac
The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1: 4. The ratio of
the number of their molecule is
the number of their molecule is
Anonymous Quiz
23%
1:4
16%
1:8
56%
7:32
5%
3:16
A compound possesses 8% sulphur by mass. The least molecular mass is
Anonymous Quiz
12%
200
67%
400
16%
155
6%
355
One mole of potassium dichromate completely oxidises the following number of mole ferrous
sulfate in acidic medium
sulfate in acidic medium
Anonymous Quiz
9%
1
40%
2
20%
4
31%
6
10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of
water produced in this reaction will be
water produced in this reaction will be
Anonymous Quiz
24%
2 mol
20%
3 mol
50%
4 mol
6%
1 mol
The first filial generation of the cross between pure tall (TT) and dwarf (tt) pea plants showed
Anonymous Quiz
6%
2 Dwarf 2 Tall
7%
1 Dwarf: 3 Tall
33%
3 Tall: 1 Dwarf
54%
All tall pea plants
In a cross between homozygous recessive and a heterozygous dominant, the phenotypic and genotypic ratios
respectively are
respectively are
Anonymous Quiz
59%
1:1 and 1:1
21%
3:1 and 1 1
18%
all are dominant phenotype and all are dominant heterozygous genotypes
2%
all are recessive phenotypes and all are recessive genotypes
The F2 generation of the cross between F1 individuals of pure tall and dwarf pea plants showed
Anonymous Quiz
11%
1/4th tall and 3/4th dwarf pea plants.
67%
3/4th tall and 1/4th dwarf pea plants.
19%
All tall pea plants.
3%
All dwarf pea plants.
The genotypic ratio of Mendel's monohybrid cross is
Anonymous Quiz
2%
2:2
11%
1:1:1:1
21%
3:1
66%
1:2:1
How many types of gametes would be produced by homozygous parents differing in single pair of contrasting character?
Anonymous Quiz
37%
1
49%
2
6%
3
9%
4
A certain orbital has no angular nodes and two radial nodes. The orbital is
Anonymous Quiz
23%
2s
58%
3s
12%
3p
7%
2p
The number of orbitals associated with quantum numbers n = 4, ms = + 1β2 is
Anonymous Quiz
18%
8
14%
25
57%
16
11%
32
For a p - electron, the orbital angular momentum is
Anonymous Quiz
18%
β6(h/2Ο)
61%
β2(h/2 Ο)
15%
(3) (h/2 Ο)
5%
2(h/2 Ο)
In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to
which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen
which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen
Anonymous Quiz
24%
3 β 2
41%
5 β 2
30%
4 β 1
6%
2 β 5
Any p-orbital can accommodate upto
Anonymous Quiz
5%
Four electrons
50%
Six electrons
8%
Two electrons with parallel spins
37%
Two electrons with opposite spins
The process of conversion of non-motile spermatids into motile spermatozoa is called
Anonymous Quiz
76%
spermiogenesis
4%
oogenesis
4%
sporogenesis
17%
spermatogenesis
Find out the incorrect statement for IUD.
Anonymous Quiz
82%
They can be self-inserted
8%
They are inserted by expert nurses/doctors
7%
They may be non-medicated IUDs, copper releasing IUDS or hormone releasing IUDS
3%
They are intrauterine devices
Emergency contraceptives are effective if used within
Anonymous Quiz
88%
72 hrs of coitus
7%
72 hrs of ovulation
3%
72 hrs of menstruation
2%
72 hrs of implantation