Class 11- Biology-chapter 10-Cell Cycle and Cell Division InstructionTotal Questions : 20Total time :20 minTotal Marks : 20 x 3 = 60 MarksEach Correct Question carries : 3 MarksEach incorrect Question Carries : -1 MarksEach Unattempted Question carry : 0 MarksBe careful On Negative Markings 1. The presence of checkpoint during mitosis ensures the attachment of all chromosomal kinetochore proteins to the spindle fibres. The absence of attachment of kinetochore proteins produces a signal preventing mitosis to proceed to next stage. The occurrence of this check point is responsible for transition from Prophase to metaphase Metaphase to anaphase Metaphase to telophase Anaphase to telophase None 2. What are spindle fibers that connect the centromere to respective poles called? Interchromosomal fibers Astral rays Interphase fibers Chromosomal fibers None 3. The movement of chromosomes to the opposite poles during cell division takes place After the nuclear membrane disintegrates Immediately after the centromere splits When the centrioles replicate Immediately following DNA replication None 4. Congression is a phenomenon of Pairing of homologous chromosomes Bringing the chromosomes on equator of spindle apparatus Separation of paired chromosomes Movement of sister chromatids towards the poles None 5. The two chromatids of a metaphase chromosome represent Replicated chromosomes to be separated at anaphase Maternal and paternal chromosomes joined at the centromere Homologous chromosome of a diploid set Non-homologous chromosomes joined at the centromere None 6. Choose the incorrect match w.r.t mitosis. Prophase - Shortest phase Anaphase - Poleward movement of chromatids Metaphase - Study of morphology of chromosome Telophase - Final stage of mitotic karyokinesis None 7. Identify the correct combination regarding anaphase, anaphase I and anaphase II. Anaphase - chromosomes cluster at opposite poles, Anaphase homologous chromosomes separate, Anaphase II - centromere splits Anaphase - centromere splits, Anaphase I - homologous chromosomes separate, Anaphase II - centromere splits Anaphase - chromatids move to opposite poles, Anaphase I - homologous chromosomes separate, Anaphase II - centromere splits Anaphase - chromosomes move to one pole, Anaphase I - homdlogous chromosomes separate, Anaphase II - centromere splits. None 8. The formation of multinucleated cell, with identical genetic information takes place by going through Multiple rounds of the M phase, but no rounds of the S phase Multiple rounds of cytokinesis, but no rounds of mitosis Multiple rounds of the cell cycle, but no rounds of mitosis Multiple rounds of mitosis, but no cytokinesis None 9. Nuclear membrane is formed around the groups of daughter chromosomes during the telophase by Heterochromatin Euchromatin Golgi apparatus Endoplasmic reticulum None 10. Which of the following is true for an animal, with a diploid number of chromosomes equal to 30? Produce two gametes with 30 chromosomes each during meiosis Not be able to undergo meiosis because gametes would end up with an odd number of chromosomes Produce four gametes with 30 chromosomes each during meiosis Produce four gametes with 15 chromosomes each during meiosis None 11. Starting with microspore mother cells, what is the least number of meiotic and mitotic divisions needed for the formation of 500 male gametes in an angiosperm? 63 and 504 65 and 500 63 and 252 63 and 500 None 12. The centromere does not divide till the end of metaphase. This is important because centromere Is connected with nuclear envelope contains genes that control prophase and metaphase Produce spindle fibers Hold the replicated DNA's together None 13. The correct sequence of different phases of mitosis is Metaphase → → Anaphase → → Telophase → → Prophase Interphase → → Prophase → → Metaphase → → Anaphase → → Telophase Anaphase → → Metaphase → → Prophase → →Telophase → →Interphase Interphase → → Telophase → → Metaphase → → Anaphase → → Prophase None 14. A diploid cell in human, where cell division does not occur:(a) Heart cell(b) Muscle cell(c) Nerve cell a and c a, b and c Only c b and c None 15. Which one of the followings is wrong for meiosis ? It occurs in diploid cell It occurs by splitting of centromeres and separation of sister chromatids It leads to formation of sister chromatids It occurs in haploid cell None 16. There are 42 chromosomes in a cell. After a particular phase of mitosis, the number of chromosomes remain same. Name the phase.I. AnaphaseII. MetaphaseIII. ProphaseIV. Telophase II and III II and IV I, II, and III I and IV None 17. Which one of the following precedes re-formation of the nuclear envelope during M-phase of the cell cycle? Decondensation from chromosome and reassembly of the nuclear lamina Transcription from chromosome and reassembly of the nuclear lamina Formation of the contractile ring and transcription from chromosomes Formation of the contractile ring and formation of the phragmoplast None 18. The process of crossing over between homologous chromosomes that takes place during meiosis is advantageous because it Allows gametes to have half the number of chromosomes Provides a source of genetic variation Makes for healthy offspring Creates a random mix of chromosomes None 19. Beads on string of A are seen in B which condense to form chromosomes in C stage of cell division. A- Chromonema B- Chromatid C- Anaphase A- Chromonema B- Chromosome C- Anaphase A- Chromonema B- Chromatin C- Metaphase A-Chromatin B- Metaphase C- Metaphase None 20. Which is not characteristic of telophase1. Chromatin condenses to form chromosomes.2. Nucleolus, Golgi complex and ER reform. 3. Nuclear envelopes assemble around chromosome clusters. 4. Centromeres split, and chromatids separate.5. Chromosome clusters and their identity is lost. 1, 2 and 4 2 and 3 1 and 4 3, 4 and 5 None Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
