| a somatic cell that has just completed the S phase of its cells cycle, as compared to gamete of the same species, has | twice 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, has | twice the number of chromosomes and four times the amount of DNA |
| colchicine prevents the mitosis of cells at which of the following stage | prophase |
| when synapsis is complete all along the chromosome, the cell is said to have entered a stage called | pachytene |
| which of the following precedes reformation of the nuclear envelope during M-phase of the cell cycle | decondensation 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 respectively | zygotene and S phase ( of interphase prior to prophase 1) |
| the stage of meiosis where centromere separate | anaphase 2 |
| duriing meiosis 1, the chromosomes start pairing at | zygotene |
| how many mitotic divisions are needed for a single cell to make 128 cells | 7 |
| DNA replication in bacteria occurs | prior to fission |
| a somatic cell that has just completed the S phase of its cells cycle, as compared to gamete of the same species, has | twice 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 part | A-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 characteristics | telophase-nuclear envelop reforms, golgi complex reforms |
| which one of the following precedes reformation of the nuclear envelop during M-phase of the cell cycle | decondensation from chromosomes, and reassembly of the nuclear lamina |
| during cell division in apical meristem the nuclear membrane appears in | telophase |
| number of chromatids at metaphase is | two each in mitosis and meiosis |
| in meiosis crossing over is initiated at | pachytene |
| genetic map is one that | establishes sites of the genes on a chromosome |
| lampbrush chromosomes occur during | diplotene of meiosis |
| meiosis is evolutionary significant because it results in | recombinations |
| meiosis 2 performs | seperation of chromatids |
| in meiosis, the daughter cells differ from parent cell as well as amongst themselves due to | segregation, independent assortment and crossing over |
| segregation of mendelian factors(Aa) occurs during | anaphase 1 |
| synapsis occurs in which stage | zygotene |
| recombination nodules occur in which stage | pachytene |
| leptotene, zygotene, pachytene, diplotene and diakinesis are 5 phases of prophase-1. which one is the longest in human oogenesis | diplotene |
| interkinesis is a stage between | two meiotic divisions |
| interkinesis is a stage between | two meiotic divisions |
| interval between mitosis and initiation of DNA replication is called | G1-phase |
| in which phase of mitosis the cell does not have nucleolus | late prophase |
| in oogenesis 4 daughter cells are formed from meiosis that are equal in size | faux |
| in which stage of mitosis, golgi complexes ER, nucleolus and nuclear envelope begins to disappear | late prophase |
| chaismata appear in which stage | diplotene |
| desynapsis of homologous chromosomes is started and chaismata are seen first during | diplotene |
| dyad of cell related with | telophase-1 |
| the movement of homologous chromosomes towards opposite poles occur during | anaphase-1 |
| the most dramatic period of cell cycle , involving a major reorganisation of virtually all components of cell is | M |
| chromatin condensation and movement of duplicated centriole towards opposite pole can be observed during | prophase |
| precursor of cell wall is | cell plate |
| appearance of diad of cells is key feature of, | telophase-1 |
| which type of division leads to multinucleated condition | free nuclear divisions |
| which chromosome is V-shaped | metacentric chromosome |
| in which order cytokinesis occurs in plants | centrifugal |
| division of nucleus is indirect in | mitosis and meiosis |
| which division is characteristic of cartilage cells, meganucleus of paramaecium and foetal membrane | amitosis |
| meiosis can be observed in | spore mother cells |
| when cell has stalled DNA replication fork, which checkpoint should be predominantly activated | G2/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 occur | chromosomes will not segregate |
| in which mitosis does not occur | bacteria |
| which part of plant is suitable for study of meiosis | anther |
| duplication of chromosomes without the division of nucleus is called | endomitosis |
| the cell would normally proceed to mitosis without interruption | when it has entered S-phase |
| what is unique to mitosis and not a part of meiosis | homologous chromosomes behave independently |
| the diploid number of chromosomes is 8, what shall be the number of chromatids in each daughter cell after meiosis-1 | 8 |
| chaismata can be observed in diplotene vrai au faux? | vrai |
| the checkpoint in cell cycle play important role in | assess DNA damage |
| beads on string string like structures of A and B, which further condense to form chomosomes in C stage of cell division | A-chromonema, B-chromatin C-metaphase |
| when synapsis is complete all along the chromosome, the cell is said to have entered a stage called | pachytene |
| the reappeance of nucleolus towards the end of mitosis is attributed to | nuclear envelope |
| the site of meiosis in higher plants is | young anther |
| meiosis in angiosperms occurs in | spore mother cell |
| in mitosis the spindle is | bipolar |
| in animals, cytokinesis is | centripetal |
| chromosomes are first observed in | prophase |
| spindle is absent in | procaryotes |
| colchicine a mitotic poison, inhibits cells in | metaphase |
| what reorganises the nucleolus in telophase | sec. constriction (NOR) |
| division of centromeres occurs in | anaphase |
| during which stage a diploi cell becomes tetraploid in mitosis | anaphase |
| sporic meiosis occurs in | all plants except most of thallophta |
| term meiosis was coined by | farmer and moore |
| in animals mitosis is mainly | amphiastral |
| in plants meiosis can be observed in | sporangia |
| kinetin(cytokinin) increase the rate of mitosis by reducing the duration of | interphase |
| the pragmoplast is organised in | at the end of anaphase |
