Title 10. CELL CYCLE AND CELL DIVISION.pdf ✅

PAPER 1 (1.) According to given figure which of the following option is correct : (1) A-Interphase (2) A-Telophase (3) A-Prophase (4) A-Anaphase (2.) Which of the following is incorrect statement about meiosis : (1) One cycle of DNA Replication occur (2) Two haploid cells are formed at the end of meiosis (3) At the end of meiosis the number of chromosome are reduced to half (4) Crossing over occur (3.) An egg cell has 2.5Pg of DNA in its nucleus. How much amount of DNA will be in this animal at the end of G2 phase of mitosis: (1) 2.5Pg (2) 5Pg (3) 10Pg (4) 20Pg (4.) Cells in G0 phase : (1) Exit the cell cycle (2) Terminate the cell cycle (3) Enter the cell cycle (4) All of these (5.) Given below are two statements : Statement I : Events of cell cycle are themselves under genetic control Statement II : Growth and reproduction are characteristic of cells, Indeed of all living organism Choose the correct answer from the options given below. (1) Both Statement I and Statement II are incorrect (2) Statement I is correct but Statement II is incorrect (3) Statement I is incorrect but Statement II is correct (4) Both, Statement I and Statement II are correct (6.) Synapsis occurs between : (1) Two non-homologous chromosome (2) mRNA and ribosomes (3) Spindle fibres and centromere (4) Two homologous chromosome
(7.) Which of the following statement is correct with respect plant cell : (1) In plant cells cell wall formation start in the center of the cell (2) Formation of the new cell wall begins with the formation of a simple precursor called cell plate (3) Cell plate represents the middle lamella are between the walls of two adjacent cells (4) All of the above (8.) Following diagrams A and B showing the phases of a cell division : Choose the correct option from the following regarding identification of above diagrams : (1) A = Metaphase - I, B = Anaphase - I (2) A = Metaphase - II, B = Anaphase - II (3) A = Metaphase - I, B = Anaphase - II (4) A = Metaphase - II, B = Anaphase - I (9.) How many pollen mother cells should undergo meiotic division to produce 64 pollen grains : (1) 64 (2) 32 (3) 16 (4) 8 (10.) Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Meiosis increase the genetic variability in population of organism from one generation to the next Reason (R) : In meiosis crossing over occur. Crossing over lead to recombination of genetic material on the two chromosome. In the light of the above statements, choose the correct answer from the options given below (1) Both (A) and (R) are true but (R) is not the correct explanation of ( A) (2) (A) is true but (R) is false (3) (A) is false but (R) is true (4) Both (A) and (R) are true and (R) is the correction explanation of ( A) (11.) Given below are two statements : Statement I : DNA synthesis occur only during one specific stage in cell cycle. Statement-II :
In animal cells during S phase centriole duplicate in nucleus. Choose the correct answer from the option given below: (1) Both Statement I and Statement II are incorrect (2) Statement I is correct but Statement II is incorrect (3) Statement I is incorrect but Statement II is correct (4) Both Statement I and Statement II are correct (12.) Arrange the following events of meiosis in correct sequence : (a) Crossing over (b) Synapsis (c) Terminalization of chiasmata (d) Disappearance of nucleolus (1) a, b, c, d (2) b, c, d, a (3) b, a, d, c (4) b, a, c, d (13.) Read the following statement and choose correct option : (a) Crossing over is the exchange of genetic material between non sister chromatids of homologous chromosome (b) Crossing over is the exchange of genetic material between sister chromatids of homologous chromosome (c) Crossing over is an enzyme mediated process (d) Enzyme recombinase involved in crossing over (1) Only a, c correct (2) Only b, c, d correct (3) Only a, c, d correct (4) Only c, d correct (14.) Which of the following is correct about G1 Phase : (i) Cell is metabolically highly active (ii) Continuous growth of the cell (iii) Replicate its DNA (1) i and ii are correct (2) Only ii is correct (3) i, ii and iii are correct (4) i and iii are correct (15.) Match the following : Column – I Column - II a) Metaphase i. Initiation of condensation of chromosomal material b) Interphase ii. Nuclear envelops assembles around the chromosomes clusters c) Telophase iii. Chromosomes arranged at equatorial plate d) Prophase iv. The period between two cell division (1) a-i, b-ii, c-iii, d-iv (2) a-iv, b-i, c-ii, d- iii
(3) a-iv, b-iii, c-i, d-ii (4) a- iii, b-iv, c-ii, d-i (16.) In which among the following mitosis division occurs in haploid cells : (1) Human (2) Some social insects (3) Some lower plants (4) Both (b) and (c) (17.) Electron micrographic view of which stage of prophase-I will show clear tetrad : (1) Leptotene (2) Pachytene (3) Zygotene (4) Diplotene (18.) The characteristic feature of diplotene stage of meiosis is recognized by : (1) Dissolution of synaptonemal complex (2) Homologous chromosomes of bivalent start separate from each other (3) X-shaped structure chiasmata formed (4) All of the above (19.) During cell division, the spindle fibres attach to the chromosome at a region called: (1) Chromocenter (2) Kinetochore (3) Centriole (4) Chromomere (20.) In which among the following stage is marked by terminalization of chiasmata : (1) Diakinesis (2) Diplotene (3) Pachytene (4) Zygotene (21.) In oocytes of some vertebrates which stage can last for months or years (1) Diplotene (2) Pachytene (3) Diakinesis (4) Zygotene (22.) How many meiotic division would be required to produced 50 synergids in angiosperms (1) 100 (2) 50 (3) 49 (4) 25 (23.) Read the following statement and choose correct answer : (a) Synapsis of homologous chromosomes takes place during prophase I of meiosis (b) Division of centromere takes place during Anaphase I of meiosis (c) Spindle fibres disappear completely in telophase of mitosis (d) Nucleoli reappear at telophase I of meiosis (1) Only a, b correct (2) Only a, b, c correct (3) Only a, c, d correct (4) Only a, b, c, d correct (24.) How many meiotic division required to form 60 seeds of higher plants : (1) 30 (2) 75 (3) 15 (4) 60 (25.) Match the following a) Every 24 hours i) Yeast completes its cell cycle b) 1 hour ii) Typical eukaryotic