CELL CYCLE & CELL DIVISION
CELL CYCLE & CELL DIVISION QUESTION BANK Question and answer based on strictly latest NCERT based pattern, and previous year NEET (AIPMT) question. chapter wise approach mcq is more useful for quick revision and increase speed for maintaining time period.
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MCQ:-
Q1) Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animals cells. If APC is defective in a human cells, which of the following is expected to occur? (NEET 2017)
Chromosomes will not condense
Chromosomes will be fragmented
Chromosomes will not segregate
Recombination of chromosome arms will occur
Answer- Chromosomes will not segregate
Q2) Which of the following options gives the correct sequences of events during mitosis? (NEET 2017)
Condensation →nuclear membrane disassembly→ crossing over→ segregation→ telophase
Condensation → nuclear membrane disassembly →arrangement at equator → segregation → telophase
Condensation → crossing over → nuclear membrane disassembly → segregation → telophase
Condensation → arrangement at equator → centromere division → segregation → telophase
Answer- Condensation → nuclear membrane disassembly → arrangement at equator → segregation → telophase
Q3) In meiosis crossing over is initiated at (NEET 2016, PHASE I)
Leptotene
Zygotene
Diplotene
Pachytene
Answer- Pachytene
Q4) Which of the following is not a characteristic feature during mitosis in somatic cells? (NEET 2016, PHASE I)
Disappearance of nucleolus
Chromosome movement
Synapsis
Spindle fibres
Answer- Synapsis
Q5) Spindle fibres attach on to (NEET 2016, PHASE I)
Kinetochore of the chromosome
Centromere of the chromosome
Kinetosome of the chromosome
Telomere of the chromosome
Answer- Kinetochore of the chromosome
Q6) When cell has stalled DNA replication fork, which checkpoint should be predominantly activated? (NEET 2016, PHASE II)
G₁/S
G₂/M
M
Both G₂/M & M
Answer- G₁/S
Q7) Match the stages of meiosis in column I to their characteristic features in column II & select the correct option using the codes given below (NEET 2016, PHASE II)
Column I Column II
Pachytene 1. Pairing of homologous
Chromosomes
Metaphase-I 2. Terminalisation of chiasmata
Diakinesis 3. Crossing-over takes place
Zygotene 4. Chromosomes align at
equatorial plate
Codes
A B C D
3 4 2 1
1 4 2 3
2 4 3 1
4 3 2 1
Answer- 3 4 2 1
Q8) During cell growth, DNA synthesis takes place in (NEET 2016, PHASE II)
S-phase
G-phase
G₂-phase
M-phase
Answer- S-phase
Q9) Arrange the following events of meiosis in correct sequences. (CBSE AIPMT 2015)
Crossing over
Synapsis
Terminalisation of chiasmata
Disappearance of nucleolus
II,I,IV,III
II,I,III,IV
I,II,III,IV
II,III,IV,I
Answer- II,I,III,IV
Q10) During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C? (CBSE AIPMT 2014)
G₀ & G₁
G₁ & S
Only G₂
G₂ & M
Answer- G₂ & M
Q11) In S-phase of the cell cycle (CBSE AIPMT 2014, 2000, 1996)
Amount of DNA doubles in each cell
Amount of DNA remains same in each cell
Chromosome number is increased
Amount of DNA is reduced to half in each cell
Answer- Amount of DNA doubles in each cell
Q12) The enzyme recombinase is required at which stage of meiosis? (CBSE AIPMT 2014)
Pachytene
Zygotene
Diplotene
Diakinesis
Answer- Pachytene
Q13) The complex formed by a pair of synaped homologous chromosomes id called (NEET 2013)
Equatorial plate
Kinetochore
Bivalent
Axoneme
Answer- Bivalent
Q14) Meiosis takes place in (NEET 2013)
Meiocyte
Conidia
Gemmule
Megaspore
Answer- Meiocyte
Q15) A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristic mentioned. (NEET 2013)
Telophase- Nuclear envelope reforms Golgi complex reforms
Late anaphase- Chromosomes move away from equatorial plate. Golgi complex not present
Cytokinesis- Cell plate formed, mitochondria distributed between two daughter cells
Telophase- Endoplasmic reticulum & nucleolus not reformed yet
Answer- Telophase- Nuclear envelope reforms Golgi complex reforms
Q16) During gamete formation, the enzyme recombinase participates during (CBSE AIPMT 2012)
Metaphase-I
Anaphase-II
Prophase-I
Prophase-II
Answer- Prophase-I
Q17) Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage? (CBSE AIPMT 2012)
Prophase-I during meiosis
Prophase-II during meiosis
Prophase of mitosis
Both prophase & metaphase of mitosis
Answer- Prophase-I during meiosis
Q18) Select the correct option with respect to mitosis (CBSE AIPMT 2011)
Chromatids start moving towards opposite poles in telophase
Golgi complex & endoplasmic reticulum are still visible at the end of prophase
Chromosomes move to the spindle equator & get aligned along equatorial plate in metaphase
Chromatids separate but remains in the centre of the cell in anaphase
Answer- Chromosomes move to the spindle equator & get aligned along equatorial plate in metaphase
Q19) During mitosis ER & nucleolus begin to disappear at (CBSE AIPMT 2010)
Late prophase
Early metaphase
Late metaphase
Early prophase
Answer- Early prophase
Q20) Which stages of cell division do the following figures A & B represent respectively? (CBSE AIPMT 2010)
Answer- Late anaphase – Prophase
Q21) Given below is a schematic break-up of the phases/stages of cell cycle
Which one of the following is the correct indication of the stage/phase in the cell cycle? (CBSE AIPMT 2009)
B-metaphase
C-karyokinesis
D-synthetic phase
A-cytokinesis
Answer- D-synthetic phase
Q22) Synapsis occurs between (CBSE AIPMT 2009)
A male & a female gamete
mRNA & ribosomes
Spindle fibres & centromere
Two homologous chromosomes
Answer- Two homologous chromosomes
Q23) The salivary gland chromosomes in the dpteran larvae are useful in gene mapping because (CBSE AIPMT 2005)
These are much longer in size
These are easy to stain
These are fused
They have endoreduplicated chromosomes
Answer- They have endoreduplicated chromosomes
Q24) Centromere is required for (CBSE AIPMT 2005)
Movement of chromosomes towards poles
Cytoplasmic cleavage
Crossing over
Transcription
Annswer- Movement of chromosomes towards poles
Q25) At what stage of the cell cyle are histone proteins synthesised in a eukaryotic cell? (CBSE AIPMT 2005)
During G₂-stage of prophase
During S-phase
During entire prophase
During telophase
Answer- During S-phase
Q26) If you are provided witroot tips of onion in you class & are asked to count the chromosomes which of the following stages can you most conveniently look into? (CBSE AIPMT 2004)
Metaphase
Telophase
Anaphase
Prophase
Answer- Metaphase
Q27) Which one of the following precedes reformation of the nuclear envelope during M-phase of the cell cycle? (CBSE AIPMT 2004)
Decondensation from chromosomes & reassembly of the nuclear lamina
Transcription from chromosomes & reassembly of the nuclear lamina
Formation of the contractile ring & formation of the phragmoplast
Formation of the contractile ring & transcription from chromosomes
Answer- Decondensation from chromosomes & reassembly of the nuclear lamina
Q28) In the somatic cell cycle (CBSE AIPMT 2004)
In G₁-phase DNA content is double the amount of DNA present in the original cell
DNA replication takes place in S-phase
A short interphase is followed by a long mitotic phase
G₂-Phase follows mitotic phase
Answer- DNA replication takes place in S-phase
Q29) Crossing over that results in genetic recombination in higher organisms occur between (CBSE AIPMT 2004)
Sister chromatids of bivalent
Non-sister chromatids of a bivalent
Two daughter nuclei
Two different bivalents
Answer- Non-sister chromatids of a bivalent
Q30) Mitotic spindle is mainly composed of which protein? (CBSE AIPMT 2002)
Actin
Myosin
Actomycin
Myoglobin
Answer- Actin
Q31) Best material for the study of mitosis in laboratory is (CBSE AIPMT 2002)
Anther
Root tip
Leaf tip
Ovary
Answer- Root tip
Q32) Which of the following occurs more than one & less than five in a chromosome? (CBSE AIPMT 2002)
Chromatid
Chromosome
Centromere
Telomere
Answer- Telomere
Q33) If diploid cell is treated with colchicine then it becomes (CBSE AIPMT 2002)
Triploid
Tetrapoid
Diploid
Monoploid
Answer- Tetrapoid
Q34) During cell dvision, the spindle fibres attach to the chromosome at a region called (CBSE AIPMT 2000)
Chromocentre
Kinetochore
Centricle
Chromomere
Answer- Kinetochore
Q35) Crossing over in diploid organism is responsible for (CBSE AIPMT 1998)
Dominance of genes
Linkage between genes
Segregation of alleles
Recombination of linked alleles
Answer- Recombination of linked alleles
Q36) Bacterium divides every 35minutes. If a culture containing 10⁵ cells per mL is grown for 175minutes, what will be the cell concentration per mL after 175 minutes? (CBSE AIPMT 1998)
5×10⁵cells
35×10⁵cells
32×10⁵cells
175×10⁵cells
Answer- 32×10⁵cells
Q37) During cell division in apical meristem the nuclear membrane appears in (CBSE AIPMT 1997)
Metaphase
Anaphase
Telophase
Cytokinesis
Answer- Telophase
Q38) How many mitotic divisions are needed for a single cell to make 128 cells? (CBSE AIPMT 1997)
7
14
28
64
Answer- 7
Q39) Which one of the following structures will not be common to mitotic cells of higher plants? (CBSE AIPMT 1997)
Cell plate
Centriole
Centromere
Spindle fibres
Answer- Centriole
Q40) The exchange of genetic material between chromatids of paired homologous chromosomes uring first meiotic division (CBSE AIPMT 1996)
Transformation
Chiasmata
Crossing over
Synapsis
Answer- crossing over
END
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