2018 Cell-Nuclear-Division MCQ QP+MS

2018 Cell and Nuclear Division MCQ 2018 / H2 / AJC PRELIM / P1 Q171The graph represents the changes in the DNA content within a cell at different stages in the cycle. Name the events occurring at P, Q, R and identify the stage where meiosis is occurring. PQRMeiosis occurring atAS phasefertilisationcytokinesisYBfertilisationinterphasecytokinesisZCS phaseprophasetelophaseYDfertilisationmetaphaseTelophaseZ

2018 / H2 / DHS PRELIM / P1 Q72Cell division is the means of almost all growth and reproduction.Which graph correctly represents a form of cell division that maintains genetic stability at expense of variation? 2018 / H2 / IJC PRELIM / P1 Q173The diagram shows the chromosomes of one cell which has been squashed during mitosis. Which stage of mitosis is shown and what is the haploid chromosome number in this species?stage of mitosishaploid chromosome number

Aanaphase5Banaphase10Cmetaphase5Dmetaphase102018 / H2 / JJC PRELIM / P1 Q154The graphs show various distance measurements taken from metaphase of mitosis onwards. The graphs are to scale when compared to one another. Which row correctly identifies the distance measurement for each graph?XYZAdistance betweendistance betweendistance of centromeres

poles of spindlesister chromatidsfrom poles of spindleBdistance betweenpoles of spindledistance of centromeres from poles of spindledistance betweensister chromatidsCdistance of centromeres from poles of spindledistance betweenpoles of spindledistance betweensister chromatidsDdistance of centromeres from poles of spindledistance betweensister chromatidsdistance betweenpoles of spindle2018 / H2 / MJC PRELIM / P1 Q10QUESTION 5In plants, dinitroaniline herbicides are thought to prevent the formation of microtubules from the protein, tubulin. These microtubules form the spindle of cells undergoing mitosis.The herbicides appear to have no effect on mammalian cells, but do affect parasitic protoctists that cause diseases in humans, such as malaria. Protoctists are eukaryotes.Which statement is consistent with this information?ADinitroaniline herbicides are most likely to act in the G1 and G2 phases of the cell cycle.BDinitroaniline herbicides prevent plant cells from entering the M phase of the cell cycle.CPlant cells and protoctists have similar enzymes controlling the formation of microtubules from the protein, tubulin.DThere are more similarities in spindle formation in mammals and protoctists than in protoctists and plants.2018 / H2 / MJC PRELIM / P1 Q11QUESTION 6Which statement helps to explain how genetically identical cells are produced during the mitotic cell cycle?AThere is only one origin of replication, which ensures that DNA replication begins at a controlled site. BCheckpoints of cell division are carefully regulated.CComplementary base pairing occurs during DNA replication.DRNA polymerase can correct some mistakes during transcription.

2018 / H2 / NJC PRELIM / P1 Q127A diploid cell contains four chromosomes. Which diagram shows the nucleus at prophase of mitosis after a meiotic cell cycle? A B C D 2018 / H2 / NYJC PRELIM / P1 Q58Which statement about the consequences of producing genetically identical cells is not correct?AAll cells will have the same phenotypes.BAll diploid cells will have the same alleles at the same loci.CAll genes will be passed to the daughter cells.DAll the coding sections of DNA will be preserved.2018 / H2 / NYJC PRELIM / P1 Q69Which statements refer to roles of meiosis in humans? 1It reduces the number of chromosomes.2It leads to the production of gametes.3It results in cells that contain identical sets of chromosomes.4It ensures that a fertilized cell has the diploid number of chromosomes.A1, 2, 3 and 4B1, 2 and 4 onlyC1 and 3 only

D2 and 4 only2018 / H2 / PJC PRELIM / P1 Q1010Nocodazole is a chemical used in the study of mitosis. It causes all mitotic cells to stop dividing at metaphase.Which statements correctly identify how this chemical might work?1inhibits chromatin condensing in the nucleus2prevents replication of the centrioles3stops sister chromatids from migrating to opposite poles.A1, 2 and 3B1 and 2 onlyC1 and 3 onlyD3 only2018 / H2 / RI PRELIM / P1 Q611.The amount of DNA present in the nucleus of a cell at the beginning of interphase is x picograms. Which of the following combinations reflects the amount of DNA, in picograms, in the nucleus during the various stages of cell division?End of interphaseEnd of mitosisEnd of meiosis IAnaphase IIAx½x½x½xBx½x½x¼xC2xxxxD2xxx½x

2018 / H2 / SAJC PRELIM / P1 Q511 The diagram below shows metaphase of mitosis in a cell of an organism. Each homologous pair of chromosomes in this organism contains 4 gene loci. This organism was genotyped and found to be heterozygous at all gene loci. The organism reproduces sexually via the production of millions of gametes by meiosis.What is the maximum possible number of genetically different gametes that can be produced by this organism, assuming crossing over does not occur during meiosis in all cells?A2B4C16D2562018 / H2 / TJC PRELIM / P1 Q612At prophase of mitosis, a eukaryote chromosome consists of two chromatids.What is the structure of a single chromatid?Aone molecule of single-stranded DNA coiled around protein moleculesBtwo molecules of single-stranded DNA each coiled around protein moleculesCone double helix of DNA coiled around protein moleculesDtwo double helices of DNA each coiled around protein molecules

2018 / H2 / TJC PRELIM / P1 Q713The diagram represents the life cycle of an animal. At which stage in the life cycle does mitosis occur? 2018 / H2 / TJC PRELIM / P1 Q814The diagram shows anaphase I of meiosis. Which diagram shows metaphase II as meiosis continues in this cell?ABCD

2018 Cell and Nuclear Division MCQ ANSQuestionAnswerQuestionAnswer1B2A3C4C5C6C7C8A9B10D11C12B13C14B15B