Cell Cycle & Cell Division - Live Session

1.

Which of the follwing is correct about cell cycle?
1. All events occur in coordinated manner
2. All events are under gentic control
3. DNA synthesis occurs only during one specific stage in the cell cycle
4. All of the above

2.

1. A-G $_{1}$ , B-S, C-G $_{2}$ , D-M phase
2. A-G $_{2}$ , B-M phase, C-G $_{1}$ , D-S
3. A-S, B-G $_{2}$ , C-G $_{1}$ , D-M phase
4. A-M phase , B-G $_{1}$ , C-G $_{1}$ , D-S

3.

Which of the following is correct about lnterphase?
1. lt is the phase present between two successive M-phase
2. lt lasts for more than 95% in duration of cell cycle in human cell
3. lt is also known as mitosis phase
4. All of the above

4.

Select correct matching:
Column 1 Column ll
A. G1 phase l Gap 1 Division
B. Cytokinesis ll Nuclear Division
C. Karyokinesis lll Cytoplasmic Divisoion
D. S phase lV Synthesis Phase
1. B $-$ 1, C $-$ 2, A $-$ 3, D $-$ 4
2. A $-$ 1, C $-$ 2, B $-$ 3, D $-$ 4
3. D $-$ 1, C $-$ 2, B $-$ 3, D $-$ 4
4. A $-$ 1, D $-$ 2, B $-$ 3, C $-$ 4

5.

Events of telophase are
(1) chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements
(2) nuclear envelope assembles around the chormosome cluster
(3) nucleolus, Golgi complex and ER reforms
(4) All of the above

6.

Furrow formation does not occur in plant cell during cytokinesis because of
(1) extensible cell wall
(2) inextensible cell wall
(3) extensible plasma membrane
(4) inextensible plasma membrane

7.

Select the total number of correct statement(s):

I:	cell-plate formation occurs in plant cell during cytokinesis.
ll:	During cytokinesis, mitochondria and plastid get distributed between two daughter cells in mitosis.
lll:	Liquid endosperm in coconut is syncytium.
lV:	Furrow formation occurs in animal cells during cytokinesis.

1. only 1 statement is correct
2. only 2 statements are correct
3. only 3 statements are correct
4. All 4 statements are correct

8.

Which of the following holds ture about me meiosis?
l. lt ensures production of haploid phase in the life cycle of sexyally reproducing orgainsm where fertillization restores the diploid phase.
ll. lt involves tow sequential cycle of nuclear and cell division called meiosis l and ll but ony a single cycle of DNA replication.
ll. lt involves pairing of homologous chromosomes and recombination between them.
lV. Four haploid cells are formed at the end of meiosis.
(1) l,ll,lV only
(2) lV only
(3) l and lll only
(4) All of the above

9.

Select the correct statement from the following:
1. ln leptotene stage chromosomes become gradually visible under light microscope
2. During zygotene heterologus chromosome shows pairing
3. Chiasma is a J-shape structure formed in diplotene
4. Pachytene is characterized by the formation of synaptonemal complex

10.

Crossing over is an exchange of genetic material between
1. homologous chromosome
2. hetrologous chromosome
3. non-homologous chromosome
4. All of the above

11.

Dikinesis is characterized by
1. condensation of chromosome
2. assemblage of spindle
3. disappearance of nucleolus and nuclear membrane
4. All of the above

12.

Which of the following statement is incorrect?
1. Prophase ll is simpler than prophase l
2. Prophase l is longer and complex than prophase of mitosis
3. Nuclear membrane reappears in telophase l
4. Anaphase ll is not characterized by splitting of centromere

13.

lnterphase is also called resting stage because
1. cell has stopped differentiation
2. cell is metabolically inactive
3. no visible change occur in the nucleus
4. cell does not grow

14.

Before cell division, the entire DNA content of the cell gets doubled during interphase.
This doubling takes place
1. throughout the interphase
2. at the beginning of the interphase
3. at the end of the interphase
4. somewhere during the middle the of the interphase

15.

Cell cycle is divisible into
1. Karyokinesis and cytokinesis.
2. interphase and prophase
3. interphase and mitotic phase
4. M-phase and S-phase

16.

Correct sequence of stages in cell cycle is
1. G $_{1}$ , S, G $_{2}$ , M
2. G $_{1}$ , G $_{2}$ , S, M
3, M, S, G $_{1}$ , G $_{2}$
4. G $_{2}$ , G $_{1}$ , M, S

17.

Best stage to observe shape, size and number of chromosomes is
1. interphase
2. metaphase
3. prophase
4. telophase

18.

Mitotic spindle is mainly composed of the protein
1. actin
2. actomyosin
3. tubulin
4. myoglobin

19.

Mitotic anaphase differs from metaphase in possessing
1. same number of chromosomes and half number of chromatids
2. half number of chromosomes and half number of chromatids
3. half number of chromosomes and half number of chromatids
4. same number of chromosomes and same number of chromatid

20.

Animal cells undergo cytokinesis by
1. furrowing
2. cell plate
3. both 1 and 2
4. furrowing and followed by deposition of special materials

21.

Significance of mitosis lies in
1. producing cells genetically similar to parent cell
2. occurrence in energy tissue of body
3. increasing cellular masss
4. swift division

22.

Mitosis differs from meiosis in
1. forming four haploid cells
2. pairing of homologous chromosomes and their subsequent separation
3. doubling of each chromosome and each pair showing four chromatids
4. duplication of chromosomes and subsequent separation of the duplicates

23.

Meiosis involves
1. two nuclear divisions and two chromosome divisions
2. two nuclear divisions and one chromosome division
3. one nuclear division and one chromosome division
4. one nuclear division and two chromosome divisions

24.

Which of the following statement is correct for meiosis?
1. First division is equatioal and second reductional
2. First division is reductional and second equational
3. Both divisions are equational
4. Both divisions are reductional

25.

How many meiotic divisions are necessary to produce 600 pollen grains?
1. 50
2. 100
3. 150
4. 300

26.

Which of the following represents the correct order in Prohase l?
1. Zygotene, diplotene, pachytene, leptotene, diakinesis
2. Diakinesis, diplotene, leptotene, pachytene, zygotene
3. Leptotene, zygotene , pachytene, diplotene, diakinesis
4. Pachytene, leptotene, zygotene, diplotene, diakinesis

27.

Synaptonemal complex has a role in
1. chromosomes pairing
2. chromosomes movement
3. chromosome segregation
3. chromosome organization

28.

Synaptonemal complex is formed during
1. cytokinesis
2. amitosis
3. mitosis
4. meiosis

29.

Bivalents are formed during
1. diplotene
2. Pachytene
3. zygotene
4. leptotene

30.

Tetrad is made of
1. four nonhomologous chromatids
2. four nonhomologous chromosomes
3. four homologous chromosomes with four chromatids
4. two homologous chromosomes and each with two chromatids

31.

Transfer of genes from one chromosome to another and vice versa during synapsis is
called
1. crossing over
2. exchange
3. chaisma
4. translocation

32.

Repulsion of homologous
1. dilotene
2. zygotene
3. diakinesis
4. leptotene

33.

chiasma formation occurs in
1. leptotene
2. zygotene
3. pachytene
4. diplotene

34.

Cross-like configuration when non-sister chromatids of a bivalent come in contact during
first meiotic division are
1. chiasmata
2. bivalents
3. chromomeres
4. centromeres

35.

Terminalisation occurs during
1. mitosis
2. diakinesis
3. cytokinesis
4. meiosis ll

36.

ln meiosis l, the centromere undergoes
1. no division
2. division between anaphase and interphase
3. division between prohase and metaphase
4. division but the daughter chromosomes do not separate

37.

Meisois ll performs
1. synthesis of DNA and cetromere
2. separation of sex chromosomes
3. separation of chromatids
4. separation of homologous chromosomes

38.

Significance of meiosis lies in the
1. reduction of chromosome number to one half
2. maintaining constancy of chromosome number during sexual reproduction
3. production of genetic variability
4. all of these

39.

The phase of cell cycle during which 'DNA polymerase' is functionally active is
1. S
2. G $_{2}$
3. $G_{1}$
4. M

40.

G1-phase is
1. end of mitosis and start of S-Phase
2. end of S-phase and start of mitosis
3. start of S-phase and start of mitosis
4. end of S-phase and end of mitosis

41.

During meiosis, crossing over occurs between
1. sister chromatids of homologous chromosomes
2. non-sister chromatids of homologous chromosomes
3. sister chromatids of non-homologous chromosomes
4. non-homologous chromatids of homologous chromosomes During meisos,

42.

Which of the following is not true for anaphase?
1. Golgi body and ER are reformed
2. Spindle poles move farther apart
3. Chromosomes move to opposite poles
4. Centromeres split and chromatids separate

43.

The longest phase of meiosis l is
(1) Metaphase-l
(2) Prophase-l
(3) Anaphase-l
(4) Telopase-l

44.

Cyclin protein is required for cell cycle. Which other molecule is essential for the
completion of cell cycle?
(1) CCK
(2) CKc
(3) CdK
(4) CKD

45.

Pick out the correct statement from the following:
(l) synapsis of homologous chromosomes takes place prophase l of meiosis.
(ll) Division of centromeres take place during anaphase l of meiosis.
(lll) Spindle fibres disappear completely in telophase of mitosis.
(lV) Nucleoli reapper at telophase l of meisos.
(1) l only
(2) lll only
(3) l and ll only
(4) l, lll and lV ony

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