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Cell Cycle And Cell Division

161 Questions Start Allen Test
All Exams Allen
Q1 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
During $G_{2}$ - phase a diploid cell contains the amount of DNA equal to a :-
A.
Diploid cell
B.
Tetraploid cell
C.
Haploid cell
D.
Hexaploid cell
Q2 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
In which order, cytokinesis occurs in plants:
A.
Centripetal
B.
Centrifugal
C.
Oblique
D.
Equatorial
Q3 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
Nuclear envelope reappears at :-
A.
Metaphase
B.
Prophase
C.
Anaphase
D.
Telophase
Q4 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
Which does not occurs in prophase?
A.
Decondensation of chromatin
B.
Condensation of chromatin
C.
Appearance of chromosome
D.
Disappearance of nuclear membrane and nucleolus
Q5 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
In which stage of cell division, number of chromosomes can be best counted?
A.
Prophase
B.
Metaphase
C.
Telophase
D.
Interphase
Q6 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
How many chromosomes shall be present in a diploid cell at mitotic anaphase if ovum of same species has ten chromosomes?
A.
10 (Ten)
B.
20 (Twenty)
C.
30 (Thirty)
D.
40 (Forty)
Q7 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
In which stage of mitosis, the chromosomes are composed of two chromatids?
A.
Prophase & metaphase
B.
Anaphase and telophase
C.
Prophase and telophase
D.
Metaphase and anaphase
Q8 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
Gap between division phase and start of DNA-replication is called :-
A.
$G_{1}$ - phase
B.
$G_{2}$ - phase
C.
M - phase
D.
Interkinesis
Q9 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
During cell division, spindle fibres attach to which part of chromosome?
A.
Primary constriction
B.
Secondary constriction
C.
Telomere
D.
Satellite
Q10 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
During which stage a diploid cell becomes tetraploid in mitosis?
A.
$G_{2}$
B.
Prophase
C.
Metaphase
D.
Anaphase
Q11 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
Division of centromere occurs in:-
A.
Prophase
B.
Metaphase
C.
Anaphase
D.
Telophase
Q12 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
What happens in synthesis phase during cell cycle?
A.
DNA replication
B.
Chromosome number becomes double
C.
Formation of two nuclei
D.
Synthesis of tubulin proteins
Q13 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
Reappearance of nucleolus along with thinning & elongation in chromosomes are diagnostic characters for the :-
A.
Anaphase
B.
Metaphase
C.
Interphase
D.
Telophase
Q14 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
Condensation of chromosomes and appearance of astral rays occur during :-
A.
Prophase
B.
Metaphase
C.
Anaphase
D.
Telophase
Q15 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
Chromosomal morphology (Structure) is best observed at :-
A.
Prophase
B.
Metaphase
C.
Interphase
D.
Anaphase
Q16 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
M-phase of cell cycle consist of :—
A.
G₁, S and G₂ phase
B.
Prophase, Metaphase, Anaphase, Telophase
C.
Interphase, Prophase, Metaphase, Anaphase, Telophase
D.
Only prophase
Q17 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
If the cell is diploid in $G_{1}$ than after the S phase cell remain/become :-
A.
n
B.
4n
C.
8n
D.
2n
Q18 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
Nuclear membrane disappears in :—
A.
Late prophase
B.
Early prophase
C.
Metaphase
D.
Telophase
Q19 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
Pre - DNA synthesis phase is:-
A.
$G_{1}$ - phase
B.
$G_{2}$ - phase
C.
S-phase
D.
Prophase
Q20 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
How many steps of division will occur in an isolated tip cell to form 128 cells?
A.
128
B.
127
C.
32
D.
7
Q21 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
The number of chromatids in a chromosome at $G_{2}$ state of cell cycle will be:-
A.
One
B.
Two
C.
Four
D.
Eight
Q22 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
Many cells function properly and divide mitotically even though they do not have :-
A.
Plasma membrane
B.
Cytoskeleton
C.
Mitochondria
D.
Plastids
Q23 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
Centromere is required for –
A.
Movement of chromosomes towards poles
B.
Cytoplasmic cleavage
C.
Crossing over
D.
Transcription
Q24 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
At which stage of the cell cycle are histone proteins synthesized in a eukaryotic cell?
A.
During telophase
B.
During S-phase
C.
During G₂-phase
D.
During entire prophase
Q25 Allen INTRODUCTION TO MODIFICATIONS OF MITOSIS MCQ
Prophase which follows the S and $G_{2}$ phases of interphase, is the first stage of :-
A.
Meiosis-II
B.
Karyokinesis
C.
Interphase
D.
$G_{1}$ phase