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NEET Biology MCQ
Neet Biology Cell Cycle, Cell Division Mcq
Quiz 15
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Q.1
Which is the longest phase of meitoic division ?
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a) Prophase-I
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b) Metaphase-I
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c) Anaphase-I
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d) Telophase-I
Explanation
Answer:(a)
Q.2
Identify “A” and “B” and mention the stage of given diagram.
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a) centrioles, kinetochore, late prophase
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b) Preprophase, kinetochore, chromatids
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c) Kinetochore, chromatids, late prophase
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d) Late prophase kinetochore, chromatids
Explanation
late prophase - the nuclear membrane and the nucleolus finally vanishes completely. The chromosomes are very distinct, easy to recognize and have clear "arms" composed of the two parts of the sister chromatids. The centrioles, and asters, are at opposite ends of the cell and the thin protein spindle fibers are reaching out and attaching to the centromeres of each chromosome from opposite directions. In prometaphase, the spindle enters the nuclear area. Specialized structures called kinetochores have formed on the centromeres of the chromosomes by this time; certain spindle microtubules—the kinetochore microtubules—attach to the kinetochores Answer:(a)
Q.3
Which plant material is best suited for studying mitosis in class room ?
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a) Pieces of bark
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b) Anther
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c) Shoot apex
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d) Root tips
Explanation
Answer:(d)
Q.4
Syncytium means........
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a) process of constriction of cytoplasm from peripheral region of cell that extends towards the centre.
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b) a condition arises when karyokinesis is not followed by cytokinesis.
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c) a multinucleate condition arises when karyokinesis and cytokinesis is over.
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d) small disc shaped structures at the surface of the centromeres.
Explanation
Answer:(b)
Q.5
The difference in the division of a plant cell and animal cell is in.....
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a) Cell membrane formation
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b) Spindle formation
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c) Movement of chromosomes from equatorial plane
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d) Coiling of the chromosomes
Explanation
Answer:(a)
Q.6
At Which sub stage of meiosis crossing over takes place ?
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a) Diplotene
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b) Pachytene
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c) Leptotene
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d) Zygotene
Explanation
Answer:(b)
Q.7
In which stage of mitosis division segregation of chromatids occur and they migrate at different polar ends.
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a) Anaphase
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b) Telophase
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c) Prophase
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d) Metaphase
Explanation
Answer:(a)
Q.8
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells ?
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a) 21
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b) 42
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c) 63
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d) 84
Explanation
Answer:(c)
Q.9
Interphase can be divided into how many sub phases ?
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a) 2
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b) 3
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c) 5
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d) 8
Explanation
Answer:(b)
Q.10
During mitotic metaphase :
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a) chromosomes are divided
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b) chromosomes become thread like and condensed
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c) crossing over occurs
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d) chromosomes are located at equator.
Explanation
Answer:(d)
Q.11
G2 phase is between :
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a) end of mitosis and start of S phase
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b) end of S phase and start of mitosis
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c) start of S phase and start of mitosis
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d) end of S phase and end of mitosis
Explanation
Answer:(b)
Q.12
Nucleus is reformed
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a) Prophase-II
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b) Telophase-I
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c) Anaphase-II
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d) Metaphase-II
Explanation
Answer:(b)
Q.13
During which phase can nucleolus be observed clearly ?
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a) Metaphase-II
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b) Metaphase
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c) Early Prophase
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d) Anaphase
Explanation
Answer:(c)
Q.14
If there are four chromosomes present during prophase – I, how many chromosome are there in each cell at the end of anaphase - II
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a) 2
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b) 4
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c) 8
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d) 16
Explanation
Answer:(a)
Q.15
Match the following :
Coulmn-I
Coulmn-II
(A) Prophase
(i) Nuclear membrane and other orgenelles reorganise
(B) Metaphase
(ii) Arrangement of chromatids on the poles
(C) Anaphase
(iii) Formation of cytoplasmic fibres of proteins
(D) Telophase
(iv) Arranged on equatorial plane
(E) Cytokinesis
(v) The formation of syncytium
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a) (A - v) (B - iv) (C - iii) (D - ii) (E - i)
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b) (A - ii) (B - iii) (C - iv) (D - v) (E - i)
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c) (A - i) (B - ii) (C - iii) (D - iv) (E - v)
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d) (A - iii) (B - iv) (C - ii) (D - i) (E - v)
Explanation
Answer:(d)
Q.16
Which of the following is present in maximum number in an adult person ?
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a) Somatic cell
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b) Reproductive cell
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c) Gamete
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d) Zygote
Explanation
Answer:(a)
Q.17
Which of the following statement is/are correct for Prophase-I ? (i) During diplotene, the members of each pair of homologous chromosomes start moving away from one another. (ii) In zygotene, bivalent chromosomes appear tetravalent. (iii) In diakinesis, chromatids become separated even at the site of chiasmata.
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a) only (i)
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b) only (ii)
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c) only (i) and (iii)
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d) (i), (ii) and (iii)
Explanation
Answer:(c)
Q.18
What does “R” indicate in the given diagram ?
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a) Cytoplasn
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b) Kinetochore
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c) Spindle fibers
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d) Cleavage furrow
Explanation
Answer:(d)
Q.19
At which stage, the homologous chromosomes separate due to repulsion, but are yet held by chiasmata :
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a) Zygotene
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b) Diakinesis
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c) Pachytene
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d) Diplotene
Explanation
Answer:(d)
Q.20
Find out the incorrect pair.
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a) Telophase – Chromatin is observed
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b) G1 phase – New DNA is synthesized
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c) Prophase – nuclear membrane disintegrates
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d) Zygotene - Synapsis
Explanation
Answer:(b)
Q.21
How many mitotic division are needed for a single cell to make 128 cells ?
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a) 7
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b) 25
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c) 34
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d) 54
Explanation
Since Mitosis is an equational division process and it produces two daughter cells from the single parent cells. Last division = 64 ×2 = 128 Second last = 32 ×2 = 64 Third last =16×2= 32 Fourth last = 8×2 = 16 Fift last = 4×2= 8 Sixth last =2×2 =4 Seventh last = 1×2=2 Total divisions 7 times Or by simple maths formula (2)2 = 128 (2)n = (2)7 n = 7 Therefore, n=7.It will take 7 divisions to produce 128 cells from a singe cell by mitosis. Answer:(a)
Q.22
Due to crossing over, an opportunity for the exchange of genes becomes possible.
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a) S - phase
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b) Cell Cycle
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c) G2 phase
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d) Significance of meiosis
Explanation
Answer:(d)
Q.23
Mitosis actually means……
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a) Reduction in number of chromosomes
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b) Division of nucleus only
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c) Division of cytoplasm only
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d) Both nuclear (Karyokinesis) and cytoplasmic divisions.
Explanation
Answer:(d)
Q.24
The telophase stage of mitosis is…….
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a) The last stage of karyokinesis
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b) More or less opposite of prophase stage.
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c) The stage where spindle fibres are abosorbed in cytoplasm
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d) All of the above
Explanation
Answer:(d)
Q.25
If the initial amout of DNA is denoted as 2C then it increases into :
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a) 2C
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b) 4C
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c) 6C
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d) 8C
Explanation
Answer:(b)
Q.26
In the plant cell, cytokinesis occurs by
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a) Separation of the cytoplasm from the periphery to central region.
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b) Separation of the cytoplasm throughout the equatorial plane simultaneously
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c) Separation of the cytoplasm from cell centre to its periphery
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d) Following of cytoplasm from two side at right angles to the plane of spindle pole
Explanation
Answer:(c)
Q.27
During mitosis nuclear membrane and nucleolus begin to disappear at :
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a) Late metaphase
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b) Early mataphase
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c) Early prophase
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d) Late prophase
Explanation
Answer:(d)
Q.28
Select correct statement’s for cell cycle. (i) Yeast cell can complete on cell cycle in every 90 minutes (ii) A period between creation of a cell and division of that cell. (iii) Cell cycle is mainly divided into interphase and differentiation like two phases.
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a) (i) and (ii) only
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b) (i) and (iii) only
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c) (ii) and (iii) only
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d) (i), (ii) and (iii)
Explanation
Answer:(a)
Q.29
Which of the following cell can complete one cell cycle in 90 minutes ?
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a) Plant cell
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b) Angal cell
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c) Animal Cell
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d) Yeast Cell
Explanation
Answer:(d)
Q.30
Crossing over involves.......
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a) Duplication of chromosomes
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b) Deletion of chromosomes
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c) Exchange of genetic matetial
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d) Addition of chromosome
Explanation
Answer:(c)
0 h : 0 m : 1 s
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