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Cell Cycle And Cell Division

161 Questions Start Allen Test
All Exams Allen
Q126 Allen 4. ANALYTICAL QUESTIONS MCQ
Condensation of chromosomes is completed in:-
A.
Prophase
B.
Interphase
C.
Metaphase
D.
Anaphase
Q127 Allen 4. ANALYTICAL QUESTIONS MCQ
Regarding to cell cycle which of the following statements is wrong?
A.
Cytoplasm increase is a continuous process
B.
DNA synthesis occurs only during one specific stage
C.
Replicated chromosomes distributed to daughter nuclei by complex series of events
D.
Events for replicated chromosomes distribution are not under genetic control
Q128 Allen 4. ANALYTICAL QUESTIONS MCQ
About cell cycle, which of the following statements is correct?
A.
In $G_{0}$ phase cells are metabolically inactive
B.
In $G_{0}$ phase cells are metabolically active
C.
Diploid somatic cells of animals divide only by meiotic division
D.
In plants only haploid cells can show mitotic divisions
Q129 Allen 4. ANALYTICAL QUESTIONS MCQ
Chromatin condensation and movement of duplicated centrioles towards opposite poles can be observed during-
A.
Prophase
B.
Metaphase
C.
Anaphase
D.
Telophase
Q130 Allen 4. ANALYTICAL QUESTIONS MCQ
Regarding arrangement of chromosomes on equator during metaphase, which of the following statements is incorrect?
A.
Each chromatid remains connected by one spindle fibres from both poles
B.
Each chromosome remains connected by spindle fibres from both poles
C.
Spindle fibres remain attached on kinetochores of both the chromatids
D.
Each chromatid remains connected at one pole by spindle fibres
Q131 Allen 4. ANALYTICAL QUESTIONS MCQ
Match the following -
Column-IColumn-II
(a)Prophase
(b)Metaphase
(c)Anaphase
(d)Telophase
(i)Decondensation
(ii)Division of centromere
(iii)Attachment of spindle fibres on kinetochores of chromosome
(iv)Initiation of assembly of mitotic spindle
A.
a-(iv) b-(iii) c-(i) d-(ii)
B.
a-(iv) b-(iii) c-(ii) d-(i)
C.
a-(iii) b-(iv) c-(ii) d-(i)
D.
a-(iii) b-(iv) c-(i) d-(ii)
Q132 Allen 4. ANALYTICAL QUESTIONS MCQ
Which of the following is not a significance of mitosis?
A.
Maintenance of identical genetic complement
B.
Cell repair
C.
Restore nucleo cytoplasmic ratio
D.
Genetic variability
Q133 Allen 4. ANALYTICAL QUESTIONS MCQ
Meiosis ensures the production of ..... phase in life cycle of sexually reproducing organism, where as fertilisation restores ...... phase.
A.
diploid, haploid
B.
haploid, triploid
C.
diploid, triploid
D.
haploid, diploid
Q134 Allen 4. ANALYTICAL QUESTIONS MCQ
Regarding key features of meiosis select out the wrong one -
A.
Meiosis involves two sequential cycles of nuclear and cell division called meiosis- I & meiosis- II
B.
Meiosis is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the S - Phase
C.
Meiosis involves pairing of homologous chromosomes and recombination between non homologous chromosome
D.
Four haploid cells are formed at the end of meiosis-II
Q135 Allen 4. ANALYTICAL QUESTIONS MCQ
Select the odd one -
A.
Zygotene ā€“ Synaptonemal complex appearance
B.
Pachytene ā€“ Appearance of recombination nodule
C.
Diplotene ā€“ Terminalisation of chiasmata
D.
Diakinesis ā€“ Assembly of meiotic spindle
Q136 Allen 4. ANALYTICAL QUESTIONS MCQ
A cell has 46 chromosomes at each pole in mitotic telophase. In this division the number of chromatids at the metaphase was :-
A.
23
B.
46
C.
92
D.
69
Q137 Allen 4. ANALYTICAL QUESTIONS MCQ
Match the following :-
Column-IColumn-II
(a)Prophase-II
(b)Metaphase-II
(c)Anaphase-II
(d)Telophase-II
(i)Enclosure of chromosomes in nuclear envelope
(ii)Separation of sister chromatids
(iii)Chromosome alignment on equator
(iv)Disappearance of nuclear membrane
A.
a-(iv) b-(iii) c-(i) d-(ii)
B.
a-(iv) b-(iii) c-(ii) d-(i)
C.
a-(iv) b-(ii) c-(iii) d-(i)
D.
a-(iv) b-(i) c-(ii) d-(iii)
Q138 Allen 4. ANALYTICAL QUESTIONS MCQ
Which of the following is not a significance of meiosis?
A.
Helps in conservation of specific chromosome number in each species
B.
Increase in genetic variability
C.
Helps in evolution
D.
Helps in growth of organism
Q139 Allen 4. ANALYTICAL QUESTIONS MCQ
Number of chromatids in each chromosome at anaphase is-
A.
One in mitosis, one in meiosis-I and two in meiosis-II
B.
One in mitosis, two in meiosis-I and one in meiosis-II
C.
Two in mitosis, one in meiosis-I and two in meiosis-II
D.
Two in mitosis, two in meiosis-I and two in meiosis-II
Q140 Allen 4. ANALYTICAL QUESTIONS MCQ
During meiosis how many cycles of nucleus division, DNA replication and division of centromere take place respectively?
A.
Three, Two, One
B.
One, Two, Two
C.
Two, Two, One
D.
Two, One, One
Q141 Allen 4. ANALYTICAL QUESTIONS MCQ
Cell cycle includes :-
A.
Cell division
B.
DNA replication
C.
Cell growth
D.
All of the above
Q142 Allen 4. ANALYTICAL QUESTIONS MCQ
Interphase of an animal cell is differ from interphase of a plant cell :-
A.
in having DNA replication
B.
in having centrioles duplication
C.
in having growth of cell
D.
in having metabolically active cell
Q143 Allen 4. ANALYTICAL QUESTIONS MCQ
Multinucleated condition in the liquid endosperm of coconut arises because :-
A.
DNA replication not occurs during cell cycle
B.
Separation of sister chromatids not occurs in anaphase
C.
Condensation of chromosomal material not occurs in prophase
D.
Karyokinesis is not followed by cytokinesis
Q144 Allen 4. ANALYTICAL QUESTIONS MCQ
Which of the following phases can last for months or years in oocytes of some vertebrates?
A.
Leptotene
B.
Zygotene
C.
Pachytene
D.
Diplotene
Q145 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
Which of the following organelles can be observed in a cell even after completion of prophase?
A.
Golgi complex
B.
Mitochondria
C.
Nucleus
D.
Endoplasmic reticulum
Q146 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
A mouse cell is treated with a chemical that interferes with the activity of actin protein. Which of the following will probably be affected the most?
A.
Formation of spindle fibres
B.
Division of cytoplasm
C.
Chromosome duplication
D.
Pairing of homologous chromosomes
Q147 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
Number of chromosome pairs at equator in metaphase-I of a diploid plant cell (for which n = 25) shall be-
A.
50
B.
100
C.
75
D.
25
Q148 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
In a diploid cell before S-phase if quantity of DNA is 20 pico gram (pg) then after meiosis I what will be the quantity of DNA in each daughter cell?
A.
10 pg
B.
20 pg
C.
5 pg
D.
40 pg
Q149 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
Diploid cell in human, where cell division does not occur :- (a) Heart cell (b) Muscle cell (c) Nerve cell Options :-
A.
Only c
B.
b and c
C.
a and c
D.
a, b and c
Q150 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
Given below are two statement - Statement-I : M-phase is the most dramatic phase of cell cycle, involving a major reorganisation of virtually all component of cell. Statement-II : Cells in $G_{0}$ -stage remain metabolically inactive but no longer proliferate unless called on to do so depending on the requirement of the organism. In the light of the above statements, choose the correct answer from the options given below :-
A.
Both statement I and statement II are correct
B.
Both statement I and statement II are incorrect
C.
Statement I is correct but statement II is incorrect
D.
Statement I is incorrect but statement II is correct