Q.1.
Find out the correct statement:
-
20%
a) Small disc like structure at the surface of the centromeres that appear after metaphase are kinetochores.
-
0%
b) Chromosomes are arranged along the equator during the prophase of mitosis.
-
40%
c) During mitosis, endoplasmic reticulum and nucleolus disappear at early prophase.
-
40%
d) A cell plate is laid down during interphase.
Q.2.
The drug colchicines used to obtain polyploidy cells, acts on the cytoskeletal structure of the plant cells called
-
0%
a) intermediate filaments
-
40%
b) actin filaments
-
0%
c) microtubules
-
60%
d) all of the above
Q.3.
How do cells at the completion of meiosis compare with cells that have replicated their DNA and just about to begin meiosis?
-
25%
a) They have the same number of chromosomes and half the amount of DNA
-
50%
b) They have half the number o chromosomes and one-fourth the amount of DNA
-
25%
c) They have twice the amount of cytoplasm and half the amount of DNA
-
0%
d) They have half the number of chromosomes and half the amount of DNA
Q.4.
Which of the following can be classified G0 cells
-
0%
a) Monocytes
-
0%
b) Lymphocytes
-
40%
c) Fibroblasts
-
60%
d) Neurons
Q.5.
In oocytes of some vertebrates, the stage of Meiosis I that can last for months or year
-
33%
a) Pachytene
-
33%
b) Diplotene
-
33%
c) Zygotene
-
0%
d) Diakinesis
Q.6.
Yeast can progress through the cell cycle for only _______ minutes. (
-
100%
a) 60.
-
0%
b) 70.
-
0%
c) 80.
-
0%
d) 90.
Q.7.
In which stage of meiosis, the chromosome number reduces to half?
-
50%
a) Anaphase I.
-
50%
b) Telophase I.
-
0%
c) Anaphase II.
-
0%
d) Telophase II.
Q.8.
If the male gametes of a plant species has eight chromosomes, then its parental cell will have:
-
0%
a) Four bivalents during metaphase I.
-
0%
b) Eight bivalents or tetrad during Pachytene.
-
0%
c) Eight chromosomes during G1 stage.
-
100%
d) 32 chromosomes during G1 stage.
Q.9.
Which one of the following is the best stage to observe the shape and size and number of chromosomes in a cell?
-
100%
a) Interphase
-
0%
b) Prophase
-
0%
c) Metaphase
-
0%
d) Telophase
Q.10.
Pairing of homologous chromosomes takes place in:
-
0%
a) Pachytene.
-
0%
b) Zygotene.
-
100%
c) Diplotene.
-
0%
d) None of these.
Q.11.
atch the following columns and select the correct option:
| (a) S phase | Duplication of mitochondria |
| (b) M phase | Phase between mitosis and initiation of DNA replication |
| (c) G1 phase | Centrioles duplicated in the cytoplasm of animal cells. |
| (d) G2 phase | Shortest phase of cell cycle. |
-
0%
a) a → 3 ; b → 4 ; c→ 2 ; d → 1
-
0%
b) a → 4 ; b → 1 ; c→ 2 ; d → 3
-
0%
c) a → 2 ; b → 3 ; c→ 4 ; d → 1
-
0%
d) a → 3 ; b → 2 ; c→ 4 ; d → 1
Q.12.
The exchange of segments of two non-homologous pair of chromosomes is termed as
-
0%
a) transformation
-
100%
b) translocation
-
0%
c) crossing over
-
0%
d) linkage
Q.13.
In which of the following stage, chromosomes are arranged at equatorial plate?
-
100%
a) Telophase.
-
0%
b) Metaphase.
-
0%
c) Anaphase.
-
0%
d) Prophase.
Q.14.
Tetrads are clearly visible during:
-
50%
a) Pachytene.
-
0%
b) Zygotene.
-
0%
c) Diakinesis.
-
50%
d) Diplotene.
Q.15.
Bivalent chromosomes clearly appears as tetrads during
-
50%
a) Diplotene
-
0%
b) Pachytene
-
0%
c) Zygotene
-
50%
d) Diakinesis
Q.16.
Many cells function properly and divide mitotically though they do not have:
-
0%
a) Mitochondria.
-
100%
b) Plastids.
-
0%
c) Cytoskeletons.
-
0%
d) Plasma membrane.
Q.17.
G0 state of cells in a eukaryotic cell cycle denotes:
-
100%
a) Pausing in the end of cycle to cope with a temporary delay.
-
0%
b) Exit of cells from cell cycle.
-
0%
c) Check point before entering the next phase.
-
0%
d) Death of a cell.
Q.18.
In an animal cell, cytokinesis is achieved by the appearance of:
-
0%
a) Furrow in the plasma membrane.
-
0%
b) Nuclear envelope.
-
0%
c) Middle lamella.
-
100%
d) Cell plate.
Q.19.
Identify the correct matched pair
-
100%
a) Synapsis of homologous chromosomes – Dipotene
-
0%
b) Terminalisation of chiasmata – Diakinesis
-
0%
c) Exchange of segments of chromatids-Zygotene
-
0%
d) Appearance of chiasmata – Leptotene
Q.20.
The check points in cell cycle play important role in:
-
50%
a) Assessing DNA damage.
-
50%
b) Repairing DNA damage.
-
0%
c) Apoptosis initiation.
-
0%
d) None of these.
Q.21.
Match the stages of meiosis in column I to their characteristic features in column II
| Column I | Column II |
| A) Pachytene | 1) Pairing of homologous chromosomes |
| B) Metaphase – I | 2) Terminalisation of chiasmata |
| C) Diakinesis | 3) Crossing over takes place |
| D) Zygotene | 4) Chromosomes align at equatorial plate |
-
0%
a) A – 3, B – 4, C- 2, D – 1
-
0%
b) A – 4, B – 3, C- 2, D – 1
-
0%
c) A – 1, B – 4, C- 2, D – 3
-
0%
d) A – 2, B – 4, C- 3, D – 1
Q.22.
Which is correct for meiotic metaphase I?
-
100%
a) Bivalents are arranged at equator.
-
0%
b) Non-homologous chromosomes form pairs.
-
0%
c) Spindle fibres are attached to chromomere.
-
0%
d) Univalents are arranged at equators
Q.23.
In mitosis the daughter cells resemble to their parent cell. But in meiosis they differ not only from parent cell in having half the number of chromosomes, but also differ among themselves qualitatively in genetic constitution due to.....
-
100%
a) Segragation and crossing over only
-
0%
b) Crossing over, independent assortment and segregation
-
0%
c) Independent assortment and segregation only
-
0%
d) Independent assortment and crossing over only
Q.24.
Statement – P : G1 stage is the last stage or interphase. Statement – Q : Systhesis of DNA takes place in G2 stage.
-
100%
a) Statement P and Q both are correct
-
0%
b) Statement P is correct statement Q is wrong
-
0%
c) Statement P is wrong and statement Q is correct
-
0%
d) Statement P and Q both are wrong
Q.25.
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.
-
100%
a) only (i)
-
0%
b) only (ii)
-
0%
c) only (i) and (iii)
-
0%
d) (i), (ii) and (iii)
Q.26.
Indentify ‘A’ and ‘B’ in given diagram.
-
100%
a) A = Centrosomes; B = Kinetochore
-
0%
b) A = Clevage furrow; B = Centriole
-
0%
c) A = Kinetochore; B = Sister chromatids
-
0%
d) A = chromatids; B = Kinetochore
Q.27.
Select the correct option from Column-I and Column-II.
| Column-I | Column-II |
| (A) Leptotene | (p) Synapsis |
| (B) Zygotene | (q) Formation of bipolar spindle |
| (C) Pachytene | (r) Condensation of chromosomes |
| (D) Diakinesis | (s) Crossing over |
-
100%
a) (A - q) (B - q) (C - s) (D - r)
-
0%
b) (A - s) (B - s) (C - p) (D - q)
-
0%
c) (A - r) (B - p) (C - s) (D - q)
-
0%
d) (A - r) (B - r) (C - s) (D - p)
Q.28.
Prophase is characterized by :
-
100%
a) thread like appearance of chromosomes
-
0%
b) arrangement of chromosomes on metaphic plate
-
0%
c) pairing of homologous chromosome
-
0%
d) spliting of centromere
Q.29.
In meiosis the daughter cells are not similar to that of parent because of :
-
100%
a) crossing over
-
0%
b) Synapsis
-
0%
c) both (a) and (b)
-
0%
d) none of these
Q.30.
The time period between meiotic I and meiotic II cell division is called :
-
100%
a) 1st gap
-
0%
b) interphase
-
0%
c) growth phase
-
0%
d) interkinesis