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level: Level 1

Questions and Answers List

level questions: Level 1

QuestionAnswer
a somatic cell that has just completed the S phase of its cells cycle, as compared to gamete of the same species, hastwice the number of chromosomes and four times the amount of DNA
a somatic cell that has just completed the S phase of its cells cycle, as compared to gamete of the same species, hastwice the number of chromosomes and four times the amount of DNA
colchicine prevents the mitosis of cells at which of the following stageprophase
when synapsis is complete all along the chromosome, the cell is said to have entered a stage calledpachytene
which of the following precedes reformation of the nuclear envelope during M-phase of the cell cycledecondensation from chromosomes an reassembly of the nuclear lamina
during which stages (or prophase 1 substages ) of meiosis do you expect to find the bivalents and DNA replication respectivelyzygotene and S phase ( of interphase prior to prophase 1)
the stage of meiosis where centromere separateanaphase 2
duriing meiosis 1, the chromosomes start pairing atzygotene
how many mitotic divisions are needed for a single cell to make 128 cells7
DNA replication in bacteria occursprior to fission
a somatic cell that has just completed the S phase of its cells cycle, as compared to gamete of the same species, hastwice the number of chromosomes and four times the amount of DNA
given below is a schematic break upof the phases/ stages of cell cycle, label each partA-karyokinesis, B-anaphase, C-cytokinesis, D- synthesis phase
a bacterium divides every 35 minutes. if a culture containing 10^5 cells per ml is grown for 175 minutes, what will be the cell concentration per ml after 175 minutes?175/35=5divisions number of cells formed (2)^5*10^5=32*10^5
anaphase promoting complex is a protien degradation machinery necessary for proper mitosis of animal cell, which of the following is expected to occur?chromosomes will not segregate
a stage in cell division is shown in the figure. select the answer which gives correct identification of the stage with its characteristicstelophase-nuclear envelop reforms, golgi complex reforms
which one of the following precedes reformation of the nuclear envelop during M-phase of the cell cycledecondensation from chromosomes, and reassembly of the nuclear lamina
during cell division in apical meristem the nuclear membrane appears intelophase
number of chromatids at metaphase istwo each in mitosis and meiosis
in meiosis crossing over is initiated atpachytene
genetic map is one thatestablishes sites of the genes on a chromosome
lampbrush chromosomes occur duringdiplotene of meiosis
meiosis is evolutionary significant because it results inrecombinations
meiosis 2 performsseperation of chromatids
in meiosis, the daughter cells differ from parent cell as well as amongst themselves due tosegregation, independent assortment and crossing over
segregation of mendelian factors(Aa) occurs duringanaphase 1
synapsis occurs in which stagezygotene
recombination nodules occur in which stagepachytene
leptotene, zygotene, pachytene, diplotene and diakinesis are 5 phases of prophase-1. which one is the longest in human oogenesisdiplotene
interkinesis is a stage betweentwo meiotic divisions
interkinesis is a stage betweentwo meiotic divisions
interval between mitosis and initiation of DNA replication is calledG1-phase
in which phase of mitosis the cell does not have nucleoluslate prophase
in oogenesis 4 daughter cells are formed from meiosis that are equal in sizefaux
in which stage of mitosis, golgi complexes ER, nucleolus and nuclear envelope begins to disappearlate prophase
chaismata appear in which stagediplotene
desynapsis of homologous chromosomes is started and chaismata are seen first duringdiplotene
dyad of cell related withtelophase-1
the movement of homologous chromosomes towards opposite poles occur duringanaphase-1
the most dramatic period of cell cycle , involving a major reorganisation of virtually all components of cell isM
chromatin condensation and movement of duplicated centriole towards opposite pole can be observed duringprophase
precursor of cell wall iscell plate
appearance of diad of cells is key feature of,telophase-1
which type of division leads to multinucleated conditionfree nuclear divisions
which chromosome is V-shapedmetacentric chromosome
in which order cytokinesis occurs in plantscentrifugal
division of nucleus is indirect inmitosis and meiosis
which division is characteristic of cartilage cells, meganucleus of paramaecium and foetal membraneamitosis
meiosis can be observed inspore mother cells
when cell has stalled DNA replication fork, which checkpoint should be predominantly activatedG2/M
anaphase promoting complex is a protien degradation machinery necessary for proper mitosis of animals cells. if APC is defective in a human cell, which of the following is expected to occurchromosomes will not segregate
in which mitosis does not occurbacteria
which part of plant is suitable for study of meiosisanther
duplication of chromosomes without the division of nucleus is calledendomitosis
the cell would normally proceed to mitosis without interruptionwhen it has entered S-phase
what is unique to mitosis and not a part of meiosishomologous chromosomes behave independently
the diploid number of chromosomes is 8, what shall be the number of chromatids in each daughter cell after meiosis-18
chaismata can be observed in diplotene vrai au faux?vrai
the checkpoint in cell cycle play important role inassess DNA damage
beads on string string like structures of A and B, which further condense to form chomosomes in C stage of cell divisionA-chromonema, B-chromatin C-metaphase
when synapsis is complete all along the chromosome, the cell is said to have entered a stage calledpachytene
the reappeance of nucleolus towards the end of mitosis is attributed tonuclear envelope
the site of meiosis in higher plants isyoung anther
meiosis in angiosperms occurs inspore mother cell
in mitosis the spindle isbipolar
in animals, cytokinesis iscentripetal
chromosomes are first observed inprophase
spindle is absent inprocaryotes
colchicine a mitotic poison, inhibits cells inmetaphase
what reorganises the nucleolus in telophasesec. constriction (NOR)
division of centromeres occurs inanaphase
during which stage a diploi cell becomes tetraploid in mitosisanaphase
sporic meiosis occurs inall plants except most of thallophta
term meiosis was coined byfarmer and moore
in animals mitosis is mainlyamphiastral
in plants meiosis can be observed insporangia
kinetin(cytokinin) increase the rate of mitosis by reducing the duration ofinterphase
the pragmoplast is organised inat the end of anaphase