2.0 x m
2-4 A
24 x m
24 A
✅ The correct answer is option A.
Biology MCQs
DNA is synthesized and chromosome number is doubled in
G1 phase
S phase
G2 phase
G0 phase
✅ The correct answer is option B.
The active site of Rubisco is evolved to bind
CO2
O2
Both of these
H2O
✅ The correct answer is option C.
Magnifying power of the electron microscope as compared to the eye is
500 X
250000X
500000X
250X
✅ The correct answer is option B.
In the case of neurons, post-mitotic cell escapes cell cycle and remain in _______ phase without proliferating further
G0 phase
G1 phase
G2 phase
S phase
✅ The correct answer is option A.
Number of spiracles present in a cockroach is
15
10
20
30
✅ The correct answer is option C.
In cell fractionation various components of cells including its organelles can be isolated in different layers depending upon:
Their physical properties like size & weight.
Physical properties of the medium like its density.
Their electrical properties like their charges
Both a and b
✅ The correct answer is option D.
Mitosis occurs in
Diploid cells only
Haploid cells only
Both diploid and haploid cells
Monoploid cells
✅ The correct answer is option C.
Which of the following plays the major role in providing support to young herbaceous parts of the plant:
Living cells of epidermis with higher turgor pressure.
Living cells of cortex and pith with higher turgor pressure.
Collenchyma cells
All of these
✅ The correct answer is option D.
Percentage of proteins in the cell membrane is
20-40%
40-50%
60-80%
80-100%
✅ The correct answer is option C.