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NEET Biology MCQ
Neet Biology Cell Cycle, Cell Division Mcq
Quiz 1
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Q.1
Astral rays are formed of ... ... [ CET Chd. 2003 ]
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a) Microfilaments
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b) Microtubules
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c) Intermediate filaments
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d) Microvilli
Explanation
Answer : (b)
Q.2
Cell plate grows from ... ... [ BHU 1992 ]
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a) Wall to centre
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b) Centre to walls
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c) One wall to another
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d) Simultaneously
Explanation
Answer : (b)
Q.3
In meiosis, chromosomes replicate during ... ... [ AFMC 2003 ]
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a) Prophase I
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b) Prophase II
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c) Telophase I
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d) Interphase
Explanation
Answer : (d)
Q.4
The stage at which DNA/ chromosome replication occurs is ... ... [ AMU 1998 ]
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a) Prophase
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b) Interphase
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c) Metaphase
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d) Previous telophase
Explanation
Answer : (b)
Q.5
Mitosis can occur in
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a) Diploid cell only
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b) Haploid and diploid cells both
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c) Haploid cell only
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d) Pollen mother cells
Explanation
Answer:(b)
Q.6
The period between two successive divisions is called......
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a) Cellcycle
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b) Interphase
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c) Cell division
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d) G1 phase
Explanation
Answer:(b)
Q.7
The two chromatids of a metaphase chromosome represents :
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a) homologous chromosome of a diploid set
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b) maternal and paternal chromosomes joined at the centromere
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c) non-homologous joined at the centromere
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d) replicated chromosomes to be separated at anaphase
Explanation
Answer:(d)
Q.8
Genetic homogeneity and exact similarity between chromosomes of various cell within the same type of issue of plant is due to :
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a) Mitosis
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b) Cytokinesis
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c) Fertilization
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d) Meiosis
Explanation
Answer:(a)
Q.9
During which of the following phase of mitosis asters appear round the centrioles ?
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a) Prophase
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b) Metaphase
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c) Anaphase
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d) Telophase
Explanation
Answer:(a)
Q.10
In how many cells the meiotic division has taken place, if the total number of gametes produced are 32 ?
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a) 4
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b) 8
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c) 16
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d) 32
Explanation
Answer:(b)
Q.11
At which phase of meiosis, the 2 cell, each with separated sister chromatids move towards opposite poles :
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a) anaphase-I
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b) anaphase-II
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c) metaphase-I
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d) metaphase-II
Explanation
Answer:(b)
Q.12
Which of the phase of mitosis is the longest? ... .. [ manipal 1995 ]
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a) Prophase
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b) Metaphase
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c) Anaphase
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d) Telophase
Explanation
Answer : (a)
Q.13
Match the following with respect to meiosis [ NEET 2020 ] Select the correct option from the following
(a) Zygotene
(i) Terminalization
(b) Pachytene
(ii) Chiasmata
(c) Diplotene
(iii)Crossing over
(d) Diakinesis
(iv) Synapsis
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a) a → i; b → ii; c → iv; d → iii;
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b) a → ii; b → iv; c → iii; d → i;
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c) a → iii; b → iv; c → i; d → ii;
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d) a → iv; b → iii; c → ii; d → i;
Explanation
Answer : (d)
Q.14
The correct sequence of phases of cell cycle is ... [ NEET 2019]
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a) M → G1→ G2→ S
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b) G1→ G2→ S → M
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c) S → G1→ G2→ M
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d) G1→ S → G2→ M
Explanation
Answer : (d)
Q.15
Cell in G0 phase : [NEET 2019]
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a) exit the cell cycle
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b) enter the cell cycle
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c) suspend the cell cycle
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d) terminate the cell cycle
Explanation
Cells in G0 phase are not actively preparing to divide. The cell is in a quiescent (inactive) stage that occurs when cells exit the cell cycle. Answer : (b)
Q.16
The concept of “Omnis cellula-e cellula” regarding cell division was first proposed by... ..[NEET 2019]
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a) Rudolf Virchow
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b) Theodor Schwann
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c) Schleiden
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d) Aristotle
Explanation
Concept of “Omnis cellula-e cellula” regarding cell division was proposed by Rudolph Virchow. Answer : (c)
Q.17
The stage during which separation of the paired homologous chromosomes begins is ... ..[NEET 2018]
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a) Diakinesis
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b) Diplotene
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c) Pachytene
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d) Zygotene
Explanation
Answer : (b)
Q.18
Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G0). This process occurs at the end of
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a) S phase
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b) G2 phase
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c) M phase
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d) G1 phase
Explanation
Answer : (c)
Q.19
Identify the correct statement with regard to G1 phase (Gap 1) of interphase.
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a) Cell is metabolically active, grows but does not replicate its DNA.
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b) Nuclear Division takes place.
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c) DNA synthesis or replication takes place.
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d) Reorganisation of all cell components takes place.
Explanation
Answer : (a)
Q.20
Which is not characteristic of meiosis ... ... [ AIIMS 2011 ]
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a) Two stage of DNA replication, first before meiosis I and Second before meiosis II
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b) Recombination and crossing over
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c) Sister chromatid separate during anaphase II
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d) Nuclear membrane disappears towards end of prophase
Explanation
Answer : (a)
Q.21
Nuclear spindle has types of fibers ... ... [ MPPMT 1995 ]
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a) One
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b) Two
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c) Three
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d) Four
Explanation
Answer : (c)
Q.22
Number of mitotic divisions required to produce 128 cells from a single cell ... ... [ AFMC 2002 ]
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a) 7
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b) 14
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c) 16
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d) 32
Explanation
For each mitotic division the number of cells doubles . So following a geometric progression, It would take seven mitotic divisions for 128 daughter cell to be formed. 1st division = 2 cells 2nd division = 4 cells 3rd division = 8 cells 4th division = 16 cells 5th division = 32 cells 6th division = 64 cells 7th division = 128 cells Answer : (a)
Q.23
What precedes reformation of nuclear envelope in M-phase ... ... [ AFMC 2008 ]
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a) Decondensation of chromosomes and appearance of nuclear lamina
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b) Transcription of chromosomes and reassembly of nuclear lamina
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c) Formation of phragmoplast and contraction ring
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d) Formation of contraction ring and transcription from chromosomes
Explanation
M-phase or mitotic phase is the actual division phase and formation of contractile ring and formation of phragmoplast precedes reformation of nuclear envelope. Contractile ring is belt-like bundle of actin and myosin that appears during cell division immediately below the plasma membrane. Contraction of this ring leads to the separation of the two daughter cells. Phragmoplast is the region of plant cell cytoplasm that becomes evident in the latter stages of mitosis. It forms from the residual microtubules of the polar mitotic spindle and appears to function in transporting materials to the 156 new cell plate forming between the daughter cells. Once the cell plate is complete, the phragmoplast is divided and gradually disappears, the cell plate finally becoming transformed into the middle lamella lying between the new cell walls. Answer : (c)
Q.24
Identify the meiotic stage in which homologous chromosomes separate while the sister chromatids remains associated at their centromere ... ... [ CBSE main 2012 ]
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a) Metaphase I
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b) Metaphase II
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c) Anaphase I
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d) Anaphase II
Explanation
In anaphase - I of meiosis homologous chromosomes separate and pass towards different poles of the spindle creating two haploid sets of chromosomes. During anaphase-II of meiosis centromere of two chromatids of a chromosome separate. The separated chromatids become independent daughter chromosome. Answer : (c)
Q.25
What is incorrect about G0 ... ... [ AIIMS 2012]
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a) Cell metabolism continues in G0
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b) Cell growth occurs in G0
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c) Biocatalyst help exit G0
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d) Mitosis occurs after G0
Explanation
Answer : (d)
Q.26
Pick up the correct statement: A) Mitosis occurs in somatic cells and meiosis in germ cells B) DNA replicates once in mitosis and twice in meiosis C)Mitosis and meiosis occur both in sexually and asexually reproducing organisms ... ...[ kerla 2008 ]
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a) A only
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b) B only
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c) C only
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d) A and B only
Explanation
Mitosis produces two daughter cells that are genetically identical to each other DNA replication is once before mitosis Meiosis This is a special sequence of 2 cell divisions that produces haploid gametes from diploid germline cells. It starts with a diploid cell that has undergone chromosomal DNA replication: 2N chromosomes, 4X DNA content. Two successive divisions, with no additional DNA replication, results in 4 haploid gametes: 1N chromosomes, 1X DNA content. DNA replication is once DNA replication occurs in S phase,thus to be very specific it is zero replication during Mitosis and Meiosis Answer : (a)
Q.27
Meiosis is ... ... [ HPPMT 1995 ]
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a) Equational
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b) Reductional
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c) Double division
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d) All the above
Explanation
Mitosis is the process of cell division wherein the chromosomes replicate and get equally distributed into two daughter cells. The chromosome number in each daughter cell is equal to that in the parent cell, i.e., diploid. Hence, mitosis is known as equational division. The second meiotic division is an equational division because it does not reduce chromosome numbers The cellular division in meiosis I is called the reduction division because it results in the reduction of the chromosome number from diploid Meiosis is a double division which occurs in a diploid cell (or nucleus) and gives rise to four haploid cells (or nuclei), each having half the number of chromosomes as compared to the parent cell. Answer : (d)
Q.28
When does synthesis of DNA end? ... ... [ AMU 2002 ]
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a) S -phase
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b) Prophase
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c) Premitotic gap phase
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d) Post mitotic gap phase
Explanation
S phase (Synthesis Phase) is the phase of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase. Answer : (a)
Q.29
Which one is not related to telophase? ... ... [ MPPMT 2009 ]
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a) Formation of nuclear membrane
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b) formation of nucleolus
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c) Elongation of chromosome
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d) chromatin fibers condense into chromosomes.
Explanation
During the prophase the nucleoli in the nucleus disappear. The chromatin fibers become tightly coiled and condense into chromosomes. Answer : (d)
Q.30
What is correct ... ... [ CBSE 2004 ]
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a) DNA content becomes double during G1 -phase
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b) Duration of interphase is short as compared to M-phase
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c) G2-phase follows mitotic phase
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d) DNA-replication occurs in S-phase
Explanation
Answer : (d)
0 h : 0 m : 1 s
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