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. 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 I and IV II and III II and IV I, II, and III None 2. 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 Anaphase to telophase Prophase to metaphase Metaphase to anaphase Metaphase to telophase None 3. Which one of the following precedes re-formation of the nuclear envelope during M-phase of the cell cycle? Transcription from chromosome and reassembly of the nuclear lamina Formation of the contractile ring and formation of the phragmoplast Formation of the contractile ring and transcription from chromosomes Decondensation from chromosome and reassembly of the nuclear lamina None 4. 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. 2 and 3 1 and 4 1, 2 and 4 3, 4 and 5 None 5. The movement of chromosomes to the opposite poles during cell division takes place Immediately after the centromere splits Immediately following DNA replication When the centrioles replicate After the nuclear membrane disintegrates None 6. The formation of multinucleated cell, with identical genetic information takes place by going through Multiple rounds of cytokinesis, but no rounds of mitosis Multiple rounds of the M phase, but no rounds of the S phase Multiple rounds of mitosis, but no cytokinesis Multiple rounds of the cell cycle, but no rounds of mitosis None 7. Which of the following is true for an animal, with a diploid number of chromosomes equal to 30? Produce four gametes with 30 chromosomes each during meiosis Produce two gametes with 30 chromosomes each during meiosis Produce four gametes with 15 chromosomes each during meiosis Not be able to undergo meiosis because gametes would end up with an odd number of chromosomes None 8. The correct sequence of different phases of mitosis is Interphase → → Telophase → → Metaphase → → Anaphase → → Prophase Interphase → → Prophase → → Metaphase → → Anaphase → → Telophase Metaphase → → Anaphase → → Telophase → → Prophase Anaphase → → Metaphase → → Prophase → →Telophase → →Interphase None 9. Identify the correct combination regarding anaphase, anaphase I and anaphase II. Anaphase - centromere splits, Anaphase I - homologous chromosomes separate, Anaphase II - centromere splits Anaphase - chromosomes cluster at opposite poles, Anaphase 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 10. What are spindle fibers that connect the centromere to respective poles called? Interphase fibers Interchromosomal fibers Chromosomal fibers Astral rays None 11. Congression is a phenomenon of Movement of sister chromatids towards the poles Pairing of homologous chromosomes Separation of paired chromosomes Bringing the chromosomes on equator of spindle apparatus None 12. Nuclear membrane is formed around the groups of daughter chromosomes during the telophase by Euchromatin Endoplasmic reticulum Heterochromatin Golgi apparatus None 13. 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 500 63 and 504 63 and 252 65 and 500 None 14. The centromere does not divide till the end of metaphase. This is important because centromere contains genes that control prophase and metaphase Hold the replicated DNA's together Is connected with nuclear envelope Produce spindle fibers None 15. 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-Chromatin B- Metaphase C- Metaphase A- Chromonema B- Chromatin C- Metaphase A- Chromonema B- Chromosome C- Anaphase None 16. Which one of the followings is wrong for meiosis ? It occurs by splitting of centromeres and separation of sister chromatids It occurs in haploid cell It occurs in diploid cell It leads to formation of sister chromatids None 17. The two chromatids of a metaphase chromosome represent Homologous chromosome of a diploid set Replicated chromosomes to be separated at anaphase Non-homologous chromosomes joined at the centromere Maternal and paternal chromosomes joined at the centromere None 18. Choose the incorrect match w.r.t mitosis. Metaphase - Study of morphology of chromosome Prophase - Shortest phase Anaphase - Poleward movement of chromatids Telophase - Final stage of mitotic karyokinesis None 19. A diploid cell in human, where cell division does not occur:(a) Heart cell(b) Muscle cell(c) Nerve cell Only c a, b and c a and c b and c None 20. The process of crossing over between homologous chromosomes that takes place during meiosis is advantageous because it Provides a source of genetic variation Allows gametes to have half the number of chromosomes Creates a random mix of chromosomes Makes for healthy offspring 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.