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