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