WorksheetsCell cycle and cell division
Total questions: 73
Worksheet time: 18hrs 15mins
Somatic cells contain _____ chromosomes, while gametes contain _____.
46, 23
23, 23
46, 46
23, 46
Which of the following statements about mitosis is false?
It is involved in growth and repair.
One of the stages is interphase.
Mitosis produces four identical daughter cells.
There is one, singular round of division.
The cells produced are diploid cells.
Which of the following statements about mitosis and meiosis are true?
Asexual reproduction is a form of mitosis.
Four rounds of mitosis produce the same number of cells as two
occurrences of meiosis.
Meiosis only occurs in sexual organs.
Mitosis and meiosis both have interphase.
The following statements relate to meiosis.
Mark the ones that are correct.
Meiosis is a process of cell division that results in 2 genetically unique
daughter cells.
The daughter cells of meiosis each have the same number of
chromosomes.
Gametes, produced by meiosis, are diploid - they each have 46
chromosomes.
The daughter cells of meiosis will have different combinations of parent
cells' DNA.
The following statements relate to specialized cells, such as red blood
cells, sperm and egg cells.
Select the correct.
Sperm cells contain large food reserves to provide them with enough
energy stores to swim to the egg cell.
In order to prevent polyploidy (an organism containing more than 2 sets of
chromosomes), the sperm changes the structure of the egg cell as soon as
it makes contact with the egg cell's surface.
Sperm cells are much larger than egg cells.
Mature red blood cells lack both a nucleus and mitochondria.
Red blood cells have no nucleus, but they do contain mitochondria to
provide energy for their cellular processes.
The following are all statements about mitosis. Which are correct?
The daughter cells produced through mitosis are genetically identical to the
parent cell.
Mitosis enables repair and replacement of cells that are dead, it is essential
for asexual reproduction and growth.
If not destroyed, cells with defective DNA can continue to replicate
uncontrollably, which could lead to cancer.
Mitosis produces 2 daughter cells that are haploid.
A cell undergoing mitosis splits into 2 daughter cells through a process
called cytokinesis.
The following are all statements about meiosis. Which are correct?
At the end of meiosis 4 daughter cells are produced.
Meiosis occurs in most cells in the human body.
There are two sets of chromosomes in the parent cell, whereas the
daughter cells produced through meiosis are haploid, and have only one
set of chromosomes.
The daughter cells produced through meiosis are not genetically identical to each other but are genetically identical to the parent cells.
Two divisions take place during meiosis.
In meiosis, the daughter cells differ from parent cell as well as
amongst themselves due to -
Segregation, independent assortment and crossing over
Segregation and crossing over
Independent assortment and crossing over
Segregation and independent assortment
Choose the correct option for the following events of meiosis in
correct sequence:
(A)Crossing over (B)Synapsis
(C)Terminalization of chiasmata
(D)Disappearance of nucleolus
BACD
ABCD
ABDC
DCBA
Identify the structures indicated by labels (i),(ii),(iii),(iv) and
select the correct option -
(i)-chromatid, (ii)-centriole, (iii)-centromere,(iv) - chromosome
(i)-chromosome,(ii)-centriole,(iii)- centromere, (iv)-chromatid
(i)-chromatid,(ii)-centromere,(iii)-centriole,(iv)-chromosome
(i)-chromosome,(ii)-centromere,(iii)-centriole,(iv)-chromatid
Given below is the representation of a certain event at a
particular stage of a type of cell division. What is this stage?
Prophase of mitosis
Prophase II during meiosis
Prophase I during meiosis
Both prophase and metaphase of mitosis
Select the correct option with respect to mitosis
Golgi complex and endoplasmic reticulum are still visible at the
end of prophase
Chromatids separate but remain in the centre of cell in
anaphase
Chromosomes move to spindle equator and get aligned along
equatorial plate in metaphase
Chromatids start moving towards opposite poles in telophase
The fruit fly has 8 chromosomes (2n) in each cell.
During interphase of mitosis if the number of chromosomes at G1
phase is 8, what would be the number of chromosomes after S phase?
32
8
16
4
Select the correct option from the following:
(iv) (iii) (ii) (i)
(i) (ii) (iv) (iii)
(ii) (iv) (iii) (i)
(iii) (iv) (i) (ii)
Centrosome undergo duplication during (i) of (ii), and begin to
move towards opposite poles of the cell during (iii) stage of (iv)
(A) S phase /Interphase /Prophase /Mitosis
(B) S phase /Interphase /Anaphase /Mitosis
(C) Prophase /Mitosis /Metaphase /Mitosis
(D) Prophase /Mitosis /Anaphase /Mitosis
‘X’ ensures the production of ‘Y’ phase in the life cycle of
sexually reproducing organisms whereas fertilization restores the
‘Z’ phase.
Identify X, Y and Z
X-Mitosis, Y-Haploid, Z- Haploid
X-Mitosis, Y-Diploid, Z-Diploid
X-Meiosis, Y-Haploid, Z-Diploid
X-Meiosis, Y-Diploid, Z-Diploid
A. Prophase Metaphase Telophase Anaphase
B. Metaphase Anaphase Prophase Telophase
C. Anaphase Metaphase Prophase Telophase
D. Prophase Metaphase Anaphase Telophase
Late
anaphase -
Chromosomes move away from equatorial plate, Golgi
complex is absent
Cytokinesis - Cell plate is formed, mitochondria distributed between 2
daughter cells
Telophase -Endoplasmic reticulum and nucleolus not formed yet
Telophase -Nuclear envelop reforms, Golgi complex reforms
Which one of the following phase of the cell cycle is also known
as the ‘resting phase’ and for how much duration of the cell cycle
does it last?
Mitosis;5% of the cell cycle
Interphase; 5% of the cell cycle
Mitosis; more then 95% of the cell cycle
Interphase; more than 95% of the cell cycle
Identify the events a and b that happen before and after the
Gap 2 phase:
a ---- Gap 2 phase ---- b
a-Go phase , b-S phase
a-Go phase , b-G1 phase
a-M phase , b-Go phase
a-S phase , b-M phase
i-d, ii-b, iii-c, iv-a
i-b, ii-c, iii-a, iv-d
i-b, ii-d, iii-a, iv-c
i-c, ii-a, iii-b, iv-d
Which stages of cell division do the following figures A and B represent
respectively?
Metaphase & Telophase
Telophase & Metaphase
Late Anaphase & Prophase
Prophase & Anaphase
A stage of mitosis is shown in the diagram. Which stage is it and
what are its characteristics?
Late prophase - chromosomes move to spindle equator
Metaphase - spindle fibers attached to kinetochores, centromeres
split and chromatids separate
Metaphase - chromosomes moved to spindle equator chromosomes
made up of two sister chromatids
Anaphase - centromeres split and chromatids separate and start
moving away
Syncytium formation takes place if -
Cytokinesis is not followed by karyokinesis
Karyokinesis does not occur
Karyokinesis is not followed by cytokinesis
Both karyokinesis and cytokinesis are prevented
Congression is a phenomenon of -
Movement of sister chromatids towards the poles
Pairing of homologous chromosomes
Separation of paired chromosomes
Bringing the chromosomes on equator of spindle apparatus
Major event that occurs during anaphase of mitosis which
brings about equal distribution of chromosomes is -
Splitting of centromeres
Condensation of chromatin
Replication of genetic material
Splitting of chromatid
i-c. ii-a, iii-d, iv-b
i-a, ii-c, iii-b, iv-d
i-d, ii-c, iii-b, iv-a
i-a, ii-c, iii-d, iv-b
A somatic cell that has just completed the S phase of its cell cycle,
as compared to gamete of the same species. Has-
Twice the number of chromosomes and twice the amount of DNA.
Same number of chromosomes but twice the amount of DNA.
Twice the number of chromosomes and 4 times the amount of
DNA.
Four times the number of chromosomes and twice the amount of
DNA.
In the statement given below, identify P,Q and R. Meiosis involves
two sequential cycles of (P) and (Q) but only a single cycle of (R)-
A. Cell division/ DNA replication/ Nuclear division
B. Nuclear division/ Cell division/ DNA replication
C. DNA replication/ Cell division/ Nuclear division
D. DNA replication/ Nuclear division/ Cell division
a-3,b-1,c-2,d-4
a-1,b-3,c-4,d-2
a-4,b-2,c-1,d-3
a-2,b-4,c-3,d-1
a-Early prophase, b-late prophase, c-transition to metaphase
b-early prophase, a-late prophase, c-transition to metaphase
c-early prophase, a-late prophase, b-transition to metaphase
b-early prophase, a-late prophase, c-transition to metaphase
Metaphase II /Anaphase II /Prophase II
Prophase II /Anaphase I /Prophase I
Metaphase II /Anaphase I /Anaphase II
Prophase II /Anaphase II /Prophase I
In a diploid cell,there are 14 chromosomes and the DNA
content is 2C after M-phase what would have been the number of
chromosomes and amount of DNA at G1, after S and G2 phase
respectively?
14,14,14 2C,4C,4C
14,28,28 2C,2C,4C
14,14,28 4C,4C,4C
28,14,14 4C,2C,2C
A
B
C
D
Stages in proper sequence of Prophase I are:
Zygotene , Leptotene, Pachytene, Diakinesis, Diplotene
Leptotene, Zygotene, Pachytene, Diplotene, Diakinesis
Leptotene, Pachytene, Zygotene, Diakinesis, Diplotene
Diplotene, Diakinesis, Pachytene, Zygotene, Leptotene
a-ii,b-i,c-iv,d-iii
a-i,b-ii,c-iv,d-iii
a-iii,b-i,c-iv,d-ii
a-ii,b-i,c-iii,d-iv
The Homologus Chromosomes separate, while sister
chromatids remain associated at their centromeres -
Anaphase I
Anaphase II
Prophase
Metaphase
Select the correct match -
Quiscent stage-G2 phase
Synthesis phase-G1 phase
Centromere splitting-Anaphase
Chromosomal condensation-Telophase
Select the incorrectly matched pair -
Syncitium - Multi-nucleated
Reductional division - Meiosis I
Equational division - Meiosis II
Crossing over- Non-homologous chromosomes
Which phase marks the period during which DNA synthesis or
Replication takes place:
G1 phase
S phase
G2 phase
Go phase
Which phase corresponds to the interval between mitosis and
initiation of DNA Replication -
G1 phase
S- phase
G2 phase
Go phase
Recombination occurs between ___ of Homologous
chromosomes
Sister chromatids
Non- sister chromatids
A sister and a non sister chromatid
None of the above
In animal cells, during the S-phase, DNA replication begins in
The cytoplasm
The centriole
The chloroplast
The nucleus
Prophase is a stage of:
S-phase
Interphase
Cytokinesis
Karyokinesis
Identify the stage of cell cycle:
Nuclear membrane and nucleolus reappear, cytokinesis follows
Anaphase I
Prophase I
Prophase II
Telophase I
At the end of Meiosis II, how many Haploid cells are formed?
2
4
6
8
Which of the following is an incorrect statement:
Cell division is an important process in living organisms
During division of a cell, cell growth does not takes place
DNA synthesis occurs only during one specific stage in cell
cycle
The events of cell cycle are under genetic control
Anaphase is characterized by:
Attachment of spindle fibers to Kinetochores
Splitting of centromeres
Re-formation of nucleolus and endoplasmic reticulum
Disappearance of Golgi complex
Duplication of centriole takes place during which phase of cell
cycle:
M phase
G1 phase
S phase
G2 phase
Interphase lasts for ___ of the duration of cell cycle
Less than 95%
More than 95%
Between 60-90%
None of the above
Which of the following is responsible for Syncytium condition-
Cytokinesis not followed by Karyokinesis
Cytokinesis at a faster rate
Karyokinesis not followed by Cytokinesis
Spindle fibre formation
The complex formed by a pair of Synapsed Homologous
chromosomes is called:
Bivalent
Tetrad
Both a & b
None of the above
The beginning of which stage is recognized by the dissolution of
synaptonemal complex:
Zygotene
Pachytene
Diakinesis
Diplotene
In the 24-hour average duration of cell cycle of a human cell,
cell division proper last for about ___
2h
1h
90min
20min
When dividing cells are observed under a light microscope,
chromosomes become visible in:
Interphase
S-phase
Prophase
G1- phase
The stage between two meiotic divisions is called:
Interphase
Cytokinesis
Karyokinesis
Interkinesis
At which stage, the Homologous chromosomes separate due to
repulsion, but are yet held by Chiasmata:
Zygotene
Pachytene
Diplotene
Diakinesis
Which of the following mechanism is responsible for increase in
genetic variability in the population of organisms from one
generation to the next:
Meiosis
Mitosis
Interphase
Interkinesis
The plane of alignment of chromosomes at the metaphase is
referred to as the:
Kinetochore
Chiasmata
Metaphase plate
Spindle fiber
The M phase starts with:
DNA replication
Cytokinesis
Karyokinesis
Movement of chromosomes towards opposite poles
The first two stages of prophase 1 are ___ compared to the
next stage.
Relatively short lived
Relatively longer
Same
None of the above
Cells at the end of Prophase, when viewed under the
microscope do not show-
Golgi complexes
Endoplasmic reticulum
Nucleolus
All of the above
Plants show mitotic divisions in:
Haploid cells
Diploid cells
Both a & b
None of the above
Which stage of cell cycle is characterized by pairing together of
chromosomes:
Leptotene
Zygotene
Pachytene
Diplotene
Which of the following is not a characteristic feature of
Anaphase:
Centromeres split
Chromosomes cluster at opposite spindle poles
Chromatids separate
Chromatids move to opposite poles
Which phase is also called as the Resting phase:
Anaphase
Telophase
Interphase
Metaphase
Cells in which stage remain metabolically active but no longer
proliferate unless called on to do so depending on the
requirement of the organism:
Interkinesis
Go phase
S phase
Telophase
In an animal cell, Cytokinesis involves:
Cell furrow formation
Cell plate formation
Both a & b
None of the above
Interkinesis is followed by which stage of cell cycle?
Telophase I
Telophase II
Prophase II
G0 Phase
Meiosis involves how many cycles of DNA replication?
1
2
3
6
Which of the following process is usually restricted to diploid
cells only:
Interphase
Meiosis
Mitosis
G0 phase
The production of offspring by sexual reproduction includes:
Involvement of vegetative units
Fusion of two gametes
Both a and b
None of the above
Cell plate formation occurs in:
Plant cells
Animal cells
Both plant and animal cells
None of the above
