Step Self Assessment Test 2020 Past Paper
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MDCAT STEP SELF ASSESSMENT MCQs:
1. Cell cycle comprises phases ________
a Two b Three
c Four d Five
2. Post mitotic cell can exist the cell
cycle during
a G2 b S-Phase
c G1 d
G0
3. DNA synthesis takes place in
a G2 b S-Phase
c G0 d
G1
4. Never cells remain the life time in
a S-Phase b G1
c G2
d G0
5. Pre-mitotic phase is ______
a G0 b S-Phase
c G2 d
G11
6. Which one is misleadingly called
resting phase
a G0 b G1
c G2 d Interphase
7. Energy storage for chromosomal
movements in
a G2
b G1
c S-Phase d G0
8. In yeast, which one takes place in 90
minutes.
a Interphase b Mitosis
c Phase d Cell cycle
9. Mitosis may be divided into phases
a Two b Four
c Six d Not possible
10. The partition of the centrioles take
place in
a Interphase
b Karyokinesis
c Prophase
d Anaphase
11. Which establish the bipolarity of the
dividing cells
a Tetrad b Asters
c Centrioles d Spindles
12. Microtubules are composed of a protein
called
a Histone b Tubulin
c Fibrin d RNA
13. Spindle is composed of __________
microtubules
a Single
set
b Two sets
c Three sets
d Four sets
14. Polar microtubules do not interact the
a Centrioles
b Chromosomes
c Tubulin
d RNA
15. Aster and spindle is called
a Mitotic
apparatus
b Chromatin
c Kinetochose
d Karyokinesis
16. Karyokinesis can be divided into phases
__________
a Two b Three
c Four d Five
17. Which one is non-dividing phase
a Prophase
b Metaphase
c Interphase
d Telophase
18. The most critical phase of the mitosis
a Prophase
b Metaphase
c Anaphase
d Telophase
19. By using histologic stains for DNA, a
network of very fine threads can be visualized during
a Interphase
b Prophase
c Metaphase
d Anaphase
20. At the beginning of prophase the length
of the chromosomes is
a 0.1-0.5um
b 0.15-2.5um
c 0.2-4.5um
d 0.25-50um
21. Primary constriction is ________
a Kineto
chore
b Centromere
c Chromatid
d Chromatin
22. Cytoplasm becomes viscous during
a Prophase
b Metaphase
c Anaphase
d Telophase
23. Which is actually reduction phase
a Prophase
b Anaphase
c Telophase
d Anaphase I
24. The paired chromosomes repel each other
and begin to separate
a Anaphase
I
b Anaphase
c Diplotene
d Telophase
25. First essential phenomenon of meiosis
a Synapsis
b Crossing over
c Chiasmata
formation
d Separation
of homologous chromosomes
26. Sister chromatids are separated from
centromere
a Metaphase
I
b Anaphase
I
c Telophase
d Anaphase
27. Reaching of the chromosomes at opposite
poles terminates
a Anaphase
b Metaphase
c Telophase
d Prophase
28. The chromosomes decondense due to
unfolding, ultimately disappear as chromatin during
a Prophase
b Anaphase
c Telophase
d Metaphase
29. Each dipoled cell after meiosis produces
a Four
diploid cells
b Two diploid cells
c Four haploid cells
d Two haploid cells
30. The interphase of meiosis lacks
a G0 b S-Phase
c G1 d G2
31. Each paried but not fused complex
structure is called
a Bivalent
b Synapsis
c Chaismata
d Crossing over
32. Chiasma visible in
a Diakinesis
b Diplotene
c Pachytene
d Zygotene
33. Synaptonemal complex disappearing in
a Pachytene
b Zygotene
c Diplotene
d Diakinesis
34. Point of interchange is
a Bivalent
b Synapsis
c Chiasma
d Centromere
35. Meiotic errors causing disorders
a Physical
b Social
c Mental
d Physical,
social and mental
36. In mongolism which pair of chromosome
fails to regregate
a X b 13th
c 21th d 22th
37. Which one is due to autosomal non
disjunction
a Down’s
syndrome
b Klinefelter’s syndrome
c Turner’s syndrome
d Jacobs
38. Tallness and obesity is related with
a Mongolism
b Klinefelters syndrome
c Turner’s syndrome
d Edward
39. Trisomy of 18 chromosomes takes place in
a Down b Patau
c Edward d Turner
40. Blebbing takes place during
a Karyokinesis
b Cytokinesis
c Apoptosis
d Necrosis
41. Intra cellular constituents are released
freely in extra cellular atmosphere during
a
Necrosis
b
Apoptosis
c Cytokinesis
d Karyokinesis
42. The cell n-1 chromosomes is results of
non – disjunction during
a
Meiosis I
b Meiosis
II
c
Meiosis I and Meiosis II
d
Mitosis
43. 44 autosomes +X individual are
a
Mongolism
b Turner
c Klinefelter
d
Edward
44. Birth frequency is greatest of
a
Patau
b
Edward
c Down
d Turner
45. Xyy individuals are
a Down
b Turner
c Jacobs d Klinefelter
46. The chance of teenage mother having
down’s syndrome child is
a One
in thousand
s b One in
hundred
c One in thirty
d One in ten
47. Nuclear envolpe fragmenting takes place
in stage of meiosis-prophase
a
Diakiness
b Diplotene
c Pachytene
d Zygotene
48. Mutation bring how many basic changes in
the cancer cells
a Two b
Three
c Four d Twenty
49. The spread of tumor cells and
establishment of secondary areas of growth is called as
a
Malignancy
b Apoptosis
c
Necrosis
d Metastasis
50. All are gift of mitosis except
a
Regeneration
b Cancer
c Healing of wounds
d Replacement of older cell
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