Q.1
In animal cell........
  • a) constriction of cytoplasm begins from the peripheral region of the cell.
  • b) middle lamella made up of pectin develops.
  • c) constriction of cytoplasm begins from the centre of the cell.
  • d) (a) and (b) both
Q.2
What is the average cell cycle span of a human cell ?
  • a) 17 Hrs.
  • b) 20 Hrs.
  • c) 24 Hrs.
  • d) 30 Hrs.
Q.3
Meiosis involves :
  • a) two nuclear division and one chromosome division
  • b) one nuclear and two chromosomes division
  • c) two each nuclear and chromosome division
  • d) one each nuclear and chromosome division
Q.4
Synapsis occurs between :
  • a) spindle fibres and centromere
  • b) a male and a female gamete
  • c) m-RNA and ribosomes
  • d) two homologous chromosomes
Q.5
The sequence in the cell cycle is………
  • a) S, G1, G2 M
  • b) G1, S G2, M
  • c) S, M G1, G2, M
  • d) G2, S, M, G1
Q.6
During which phase of prophase-I of meiosis does the process of synapsis occur ?
  • a) Diplotene
  • b) Leptotene
  • c) Pachytene
  • d) Zygotene
Q.7
For the statement ‘X’ and statement ‘Y’ which of the following option is correct ? Statement – ‘X’ :During meiosis the genetic material is replicated once. Statement – ‘Y’ : Genetic material is not replicated during interkinesis.
  • a) Both statements ‘X’ and ‘Y’ are correct
  • b) ‘X’ is correct and ‘Y’ is wrong
  • c) Both statements ‘X’ and ‘Y’ are wrong
  • d) ‘X’ is wrong and ‘Y’ is correct
Q.8
Match the following :
Coulmn-I Coulmn-II
(A) Prophase-I (i) Chromosomes move toward one plane along with centromere.
(B) Metaphase-II (ii) Half the number of chromosomes in seen
(C) Anaphase-I (iii) Longest phase of meiosis-I
(D) Telophase-I (iv) Two nuclei are seen
  • a) (A - iii) (B - i) (C - ii) (D - iv)
  • b) (A - i) (B - ii) (C - iii) (D - iv)
  • c) (A - ii) (B - iii) (C - iv) (D - i)
  • d) (A - iv) (B - i) (C - i) (D - iii)
Q.9
Complete disintegration of nuclear membrane and nucleolus take place during which stage of mitosis ?
  • a) Prophase
  • b) Metaphase
  • c) Anaphase
  • d) Telophase
Q.10
In diploid living organisms crossing over is responsible for ?
  • a) No Segregation of genes
  • b) Linkage between genes
  • c) Recombination of linked genes
  • d) Dominancy of genes
Q.11
The result of meiosis is the formation of....... Explanation provided please click on
  • a) 2 cells
  • b) 6 cells
  • c) 8 cells
  • d) 4 cells
Q.12
Cytokinesis is generally, but not always, seen in mitosis. If cells undergo mitosis and do not follow cytokinesis then it would result in :
  • a) Cells with abnormal small nuclei
  • b) Ensuring genetic homogeneity of cell
  • c) A cell with a single large nucleus
  • d) A cell with two or more nuclei
Q.13
During meiosis centromere divides :
  • a) Only once at anaphase – I
  • b) Twice in meiosis – I & II
  • c) Only one at anaphase - II
  • d) Twice in each cell at the end of anaphase – I & II
Q.14
Which structure can be observed at the surface of centromere during metaphase ?
  • a) Kinetochores
  • b) Chromatophore
  • c) Kinetophore
  • d) Chromatophore
Q.15
A. G1 phase is also called growth phase. R. There is a lot of biosynthetic activity during
  • a) Both A and R are true and R is correct explanation of A.
  • b) Both A and R are true and R is not correct explanation of A
  • c) A is true and R is wrong
  • d) A is wrong and R is true
Q.16
How does the pairs of homologous chromosomes appear during zygotene phase ?
  • a) Tetravalent
  • b) Bivalent
  • c) Trivalent
  • d) Univalent
Q.17
Crossing over occurs between.......
  • a) Non – homologous chromatids of non homologous chromosomes
  • b) Non – sister chromatids of homologous chromosomes
  • c) Sister chromatids of homologous chromosomes
  • d) Sister chromatids of non homologous chromosome
Q.18
Which of the following statement is true for prophase ?
  • a) At the end of this phase nuclear membrane is formed
  • b) Centriole divides and arranged on opposite pole.
  • c) At the end of this phase chromosomes disappear.
  • d) In this phase condensation of chromosome takes place along their lengths.
Q.19
The period between two successive divisions is called......
  • a) G1 phase
  • b) Cell division
  • c) Cellcycle
  • d) Interphase
Q.20
Which of the following structure will not be common to mitotic cell of a higher plant ?
  • a) Centriole
  • b) Cell plate
  • c) Centromere
  • d) Spindle fibre
Q.21
Pairing of homologous chromosomes during zygotene is termed :
  • a) Synapse
  • b) crossing over
  • c) synapsis
  • d) Terminalisation
Q.22
Number of chromosomes are maintained from generation to generation by :
  • a) Metamorphosis
  • b) Mitotic division
  • c) Division
  • d) Meiosis division
Q.23
The stage of mitosis during which the nucleolus disintegrates and chromosomes appear is known as
  • a) Prophase
  • b) Interphase
  • c) Anaphase
  • d) Metaphase
Q.24
The number of meiotic divisions required to produce 400 seeds in a pea plant is..... Explanation is provided please clikc on
  • a) 700
  • b) 200
  • c) 500
  • d) 400
Q.25
What is shown by given diagram and what is indicatd as ‘A’ in it ?
unit-3_ch-3_que_no-411_img_no1.png
  • a) Early prophase; A = Cleavage furrow
  • b) Interphase (G2); A = Centrosomes
  • c) Late prophase; A = Kinetochore
  • d) Interphase (G1); A = Centrosomes
Q.26
In which of the following stages chromosomes are not seen clearly ?
  • a) Diplotene
  • b) Prophase-II
  • c) Metaphase-III
  • d) Leptotene
Q.27
What is average cell cycle span of a Yeast cell ?
  • a) 70 min.
  • b) 85 min.
  • c) 90 min.
  • d) 120 min.
Q.28
The two chromatids of a metaphase chromosome represents :
  • a) replicated chromosomes to be separated at anaphase
  • b) maternal and paternal chromosomes joined at the centromere
  • c) homologous chromosome of a diploid set
  • d) non-homologous joined at the centromere
Q.29
At which stage of mitosis chromatids separate and passes to different poles :
  • a) Telophase
  • b) Anaphase
  • c) Prophase
  • d) Metaphase
Q.30
Statement – P : G1 stage is the last stage or interphase. Statement – Q : Systhesis of DNA takes place in G2 stage.
  • a) Statement P and Q both are correct
  • b) Statement P is correct statement Q is wrong
  • c) Statement P is wrong and statement Q is correct
  • d) Statement P and Q both are wrong
0 h : 0 m : 1 s