CBSE Class 11 Biology Cell Cycle And Cell Division Worksheet Set C

Question: Which of the following is called heterotypic division?
a) Meiosis-I
b) Meiosis-II
c) Mitosis
d) Amitosis
Answer: a

Question: The two asters together with spindle fibres form:
a) Mitotic apparatus
b) Asters
c) Astral fibres
d) Centrosome
Answer: a

Question: Which one of the following statement is incorrect for interkinesis?
a) It is the stage between the two subphases of a meiotic division
b) There is no replication of DNA
c) DNA replicate but chromosome number remains same
d) It is generally short lived
Answer: c

Question: DNA replication is found in:
a) Mitosis and meiosis-I
b) Mitosis and meiosis-I and meiosis-II
c) Meiosis only
d) Mitosis only
Answer: a

Question: In the somatic cell cycle:
a) DNA replication takes place in S-phase
b) A short interphase is followed by a long mitotic phase
c) G2 phase follows mitotic phase
d) In G1 phase DNA content is double the amount of DNA present in the original cell
Answer: a

Question: Crossing over that results in genetic recombination in higher organisms occurs between:
a) Non-sister chromatids of a bivalent
b) Two daughter nuclei
c) Two different bivalents
d) Sister chromatids of a bivalent
Answer: a

Question: If n = 16 in plant cell, then what is possible in metaphase-I of meiosis?
a) 32 Bivalents
b) 16 Telravalents
c) 16 Bivalents
d) 32 Bivalents
Answer: c

Question: Telophase is:
a) Final stage of karyokinesis
b) Final stage of mitosis
c) Mid stage of karyokinesis
d) First stage of cytokinesis
Answer: a

Question: Many cells function properly and divide mitotically even though they do not have:
a) Plasma membrane
b) Cytoskeleton
c) Mitochondria
d) Plastids
Answer: d

Question: 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-stage of prophase
d) During entire prophase
Answer: b

Question: In prophase centrosome which had undergone duplication during interphase, begins to move towards:
a) Same poles of the cell
b) Opposite poles of the cell
c) One towards centre while another towards pole
d) Both towards centre
Answer: b

Question: Centromere is required for:
a) Movement of chromosomes towards poles
b) Cytoplasmic cleavage
c) Crossing over
d) Transcription
Answer: a

Question: Thick-thread stage occurs in:
a) Leptotene
b) Zygotene
c) Pachytene
d) Diplotene
Answer: c

Question: G0 (Quiescent) stage is:
a) Part of interphase
b) Part of M-phase
c) Part of G2 phase
d) Not a part of cell cycle
Answer: d

Question: The significance of meiosis is that it:
a) Produces four cells having chromosomal number equal to mother cell
b) Occurs in all types of cells
c) Maintains the constant chromosome number to a particular species
d) Growth of animal body organs
Answer: c

Question: Nuclear envelope develops around the chromosome clusters at:
a) One pole
b) Centre
c) Each pole
d) Pole as well as centre both
Answer: c

Question: During prophase each centrosome radiates out microtubules called:
a) Mitotic apparatus
b) Spindle apparatus
c) Asters
d) Spindle fibres
Answer: c

Question: At anaphase-II, sister chromatids move towards opposite poles of the cell by:
a) Contraction in spindle fibre attached to kinetochores
b) Shortening of microtubules attached to kinetochores
c) Lengthening of microtubules attached to kinetochores
d) Relaxation in spindle fibre attached to kinetochores
Answer: b

Question: In a slow dividing normal cell:
a) G1 phase is more longer than S phase
b) S phase is more longer than G1 phase
c) Both phases are equal in duration
d) Can’t be determined
Answer: a

Question: Which one of the following is most correct statement?
a) Chromatin material tends to collect in a mass in the two poles
b) Each set of chromatin material tends to collect at each of the two poles
c) Each set of chromatin material tends to collect at metaphasic plate
d) Chromatin material tends to collect in a mass at one pole
Answer: b

Question: How many times divisions will occur in an isolated tip cell to form 128 cells?
a) 128
b) 127
c) 32
d) 7
Answer: d

Question: In which stage the DNA is doubled?
a) Metaphase
b) Anaphase
c) Interphase
d) Prophase
Answer: c

Question: Cytokinesis is:
a) Formation of cell wall
b) Formation of cell membrane
c) Separation of nucleoplasm
d) Separation of cytoplasm
Answer: d

Question: Prophase which follows the S and G2 phases of interphase, is the first stage of:
a) Meiosis-II
b) Karyokinesis
c) Interphase
d) G1 phase
Answer: b

Question: Meiosis involves:
a) Pairing of homologous chromosomes and recombination between sister chromatids of nonhomologous chromosomes
b) Pairing of homologous chromosomes and recombination between nonsister chromatids of homologous chromosomes
c) Pairing of nonhomologous chromosomes and recombination between nonsister chromatids of homologous chromosomes
d) Pairing of homologous chromosomes and recombination between sister chromatids of homologous chromosomes
Answer: b

Question: When synapsis is complete all along the chromosome, the cell is said to have entered a stage called:
a) Zygotene
b) Pachytene
c) Diplotene
d) Diakinesis
Answer: b

Question: In which of the following stage, the four chromatids of each bivalent chromosome become distinct and clearly appear as tetrads?
a) Leptotene
b) Zygotene
c) Pachytene
d) Diplotene
Answer: c

Directions for Assertion & Reason questions

These questions consist of two statements each, printed as Assertion and Reason. While answering these Questions you are required to choose any one of the following four responses.
a) If both Assertion&Reason are True&the Reason is a correct explanation of the Assertion.
b) If bothAssertion&Reason are True butReason is not a correct explanation of the Assertion.
c) If Assertion is True but the Reason is False.
d) If bothAssertion&Reason are false.

Question:
Assertion : Telophase-I leads to formation of diad of cells.
Reason : Telophase-I is marked by completion of karyokinesis and cytokinesis as well.
a) A
b) B
c) C
d) D
Answer: a

Question:
Assertion : M-phase is the most dramatic period of the cell cycle.
Reason : It involves a major reorganisation of virtually all components of the cell.
a) A
b) B
c) C
d) D
Answer: a

Question:
Assertion : Replication of DNA not occurs during interkinesis.
Reason : Division of chromosomes takes place during meiosis-II.
a) A
b) B
c) C
d) D
Answer: b

Question:
Assertion : Each chromatid is attached with two spindle fibres during S-phase.
Reason : During Anaphase-I each chromosome is found in bivalent form.
a) A
b) B
c) C
d) D
Answer: d

Question:
Assertion : Morphology of chromosomes is most studied during metaphase of cell division.
Reason : Complete disintegration of nuclear envelope marks the start of metaphase, second phase of mitosis.
a) A
b) B
c) C
d) D
Answer: b

Question:
Assertion : Small cells are metabolically less active.
Reason : K.I. of small cells is less.
a) A
b) B
c) C
d) D
Answer: d

Question:
Assertion : Kinetochore is essential for cell division.
Reason : Kinetochores serve as the sites of attachment of spindle fibres to the chromosome.
a) A
b) B
c) C
d) D
Answer: a

Question:
Assertion : Crossing over take place during pachytene stage.
Reason : It is a process of interchange of chromatid material between non-sister chromatid of homologous chromosomes.
a) A
b) B
c) C
d) D
Answer: b

Question:
Assertion : In anaphase number of chromosomes get doubled.
Reason : During anaphase each chromosome split simultaneously and two daughter chromatids now referred to as chromosomes.
a) A
b) B
c) C
d) D
Answer: a

Question:
Assertion : In plant cells cell plate method is found for cytokinesis instead of cell furrow method.
Reason : Plant cells are enclosed by a relatively inextensible cell wall.
a) A
b) B
c) C
d) D
Answer: a

Question:
Assertion : Cell growth results into division.
Reason : Cell growth leads to change in nucleocytoplasmic ratio.
a) A
b) B
c) C
d) D
Answer: a

Question:
Assertion : Cells in quiscent stage (G0) are metabolically inactive, so don’t show cell division.
Reason : Quiscent stage appears on exit of cell from G2 phase of cell cycle.
a) A
b) B
c) C
d) D
Answer: d

Question:
Assertion : Zygotene is characterised by formation of synaptonemal complex.
Reason : Synaptonemal complex helps in synapsis of non-homologous chromosomes.
a) A
b) B
c) C
d) D
Answer: c

Question:
Assertion : Disappearance of nuclear membrane is generally essential for karyokinesis.
Reason : Forward movement of chromosomes is dependent on spindle apparatus, which organise in cytoplasm.
a) A
b) B
c) C
d) D
Answer: c

Question:
Assertion : Meiosis is also known as reduction division.
Reason : Meiosis reduces the number of chromosomes in daughter cells.
a) A
b) B
c) C
d) D
Answer: a

Question:
Assertion : In higher plants, the mitosis is termed as anastral mitosis.
Reason : In higher plants, mitosis takes place without spindle fibers.
a) A
b) B
c) C
d) D
Answer: c

Question:
Assertion : Yeast can progress through the cell cycle in only about 90 minutes.
Reason : Duration of cell cycle can vary from organism to organism.
a) A
b) B
c) C
d) D
Answer: b

Question:
Assertion : Meiosis produces four genetically dissimilar cells.
Reason : Crossing over or gene exchange takes place in meiosis.
a) A
b) B
c) C
d) D
Answer: a

Question:
Assertion : Meiosis-I is most significant phenomenon from evolution point of view.
Reason : Meiosis-I leads to reduction in chromosome so that consistancy of chromosome can be maintained.
a) A
b) B
c) C
d) D
Answer: b

Question:
Assertion : During S-phase, amount of DNA per cell doubles.
Reason : During S-phase, there is no increase in chromosome number.
a) A
b) B
c) C
d) D
Answer: b