InterviewSolution
Saved Bookmarks
InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The major event that occurs during the anaphase of mitosis. Which bring about the equal distribution of chromosomes, isA. Replication of the genetic materialB. Splitting of the chromatidsC. Spliting mitosis and meiosisD. Condensation of the chromatin |
| Answer» Correct Answer - c | |
| 2. |
If there were 4 chromosomes present during prophase, how many chromosomes are there in each cell at the end of anaphase it.A. 16B. 4C. 2D. 8 |
| Answer» Correct Answer - c | |
| 3. |
Reason of chromosomal movement in Anaphase isA. Astral raysB. CentriolesC. KinetochoreD. Kinetochore and spindle fibres |
| Answer» Correct Answer - D | |
| 4. |
Nuclear envelope reappears atA. MetaphseB. ProphaseC. AnaphaseD. Telophase |
| Answer» Correct Answer - D | |
| 5. |
During mitosis ER and nucleolus begin to disappear atA. Late prophaseB. Early metaphaseC. Late metaphaseD. Early prophase |
| Answer» Correct Answer - D | |
| 6. |
Crossing over in diploid organisms is responsible forA. dominance of genesB. linkage between genesC. segregation of allelesD. recombination of alleles. |
|
Answer» Correct Answer - D Crossing over is a process of exchange of genetic material between non-sister chromatids of two homologous chromosomes and and leads to recombination of genes. It is an enzyme mediated process. |
|
| 7. |
The members of a homologous pair of chromosomesA. are identical in size and appearanceB. contain identical genetic informationC. seperation and move to opposite poles of the cell during mitosisD. are found only in hploid cells. |
|
Answer» Correct Answer - A Homologous chormosomes are chormosomes having same structural features. In dipilod nuclei, pairs of homologous chromosomes can be identified at the start of meiosis. One member of each pair comes from the female parent and other from the male parent. Homologous chromosomes have the same pattern of genes along the chromosome but the nature of the genes may differ. |
|
| 8. |
To produce 102 pollen grains, how many meiotic divisions are required ?A. 25B. 25.5C. 26D. 27 |
| Answer» Correct Answer - C | |
| 9. |
Which is correct for meiotic metaphase-I ?A. Bivalents are arranges at equator.B. Univalents are arranged at equator.C. Non-homologous chromosomes form pair.D. Spindle fibres are attached at chromomere. |
| Answer» Correct Answer - A | |
| 10. |
A contractile mid body forms during cytokinesis in :-A. AnimalsB. Higher plantsC. FungiD. Algae |
| Answer» Correct Answer - A | |
| 11. |
Agglutination of chromosomes is caused by a mitotic poison calledA. Mustard gasB. RibonucleaseC. AzideD. Chalones |
| Answer» Correct Answer - A | |
| 12. |
Which of the following is used as the mitotic spindle poisonA. `Ca^(++)`B. `Mg^(++)`C. TubullinD. Colchicine |
|
Answer» Correct Answer - d Spindle depolymeriation is caused by Colchicine. |
|
| 13. |
Colchicine is a cell pison which arrests cell division at __ and can induce ___A. metaphase, parthenocarphyB. anaphae, parthenocarpyC. metaphase, polyploidyD. anaphase, polyploidy |
| Answer» Correct Answer - C | |
| 14. |
Spindle formation can be distrupted by exposing cell to the microtubule poison such asA. high concentration of oxygenB. vitamin AC. cholesterolD. colchicine. |
| Answer» Correct Answer - D | |
| 15. |
Colchicine arrests spindle atA. Anaphase-IB. prophaseC. telophaseD. metaphase |
| Answer» Correct Answer - D | |
| 16. |
Microtubule depolymerizing durg such as colchicine is expected toA. Inhibit spindle formation during mitosisB. Inhibit cytokinesisC. Allow mitosis beyond metaphaseD. Induce formation of multiple contractile rings. |
| Answer» Correct Answer - a | |
| 17. |
What is true about telophase stage of mitosis?A. Chromosomes lose their identify as discrete elements.B. Chromosomes duster at opposite spindle poles.C. Nuclear envelope, nucleouls, Golgi complex and ER reform.D. All of these |
|
Answer» Correct Answer - D During telophase, the individual chromosomes are no longer seen and chromatin material tends to collect in a mass at the two poles. Chromosomes cluster at opposite spindle poles and their identify is lost as discrete elements. Nuclear envelope assembles around the chromosome clusters. Nucleolus, Golgi complex and ER reform. |
|
| 18. |
Assertion: In mitosis, prophase has no substages. Reason: In meiosis, prophase has six substages.A. Both assertion and reason are true and the reason is a correct explanation of assertion.B. Both assertion and reaso are true, but the reason is not the correct explanation of the assertion.C. Assertion is true, but reason is falseD. Assertion is false, but reason is true |
|
Answer» Correct Answer - C Prophase-I stage of meiosis is more complicated and prolonged as compared to the prophase stage of mitosis. Prophase-I is divided into five substages, i.e, leptotene, zygotene, pachytene, diplotene and diakinesis. Each stage is characterised by different events. |
|
| 19. |
Which phase of mitosis is essentially the reverse of prophase in terms of nuclear changes?A. S-phaseB. AnaphaseC. TelophaseD. Interphase |
|
Answer» Correct Answer - C During telophase of mitosis viscosity of cytoplasm decreases. A new nuclear membrane is formed (either from older nuclear envelope or ER) around each set of chromosomes. Chromosomes overlap forming chromatin. The Nucleolar organiser region of satelite chromosomes produce nucleolus for each daughter nucleus. Nucleoplasm surrounds in the area of chromatin. The gel state of spindle is converted into sol state and disappears. In this way two daughter nuclei are formed at the poles of spindle. Hence, this phase is just reverse of prophase. |
|
| 20. |
Which phase of interphase is the most important point in regulation of the cell cycle, during which it must decide whether the cell will start a new cycle or will enter in `G_(0)` phase ?A. `G_(1)` phaseB. S phaseC. `G_(2)` phaseD. Quiescent stage |
| Answer» Correct Answer - A | |
| 21. |
The kind of cytokinesis in animal cell isA. centrifugalB. centripetalC. both (a) and (b)D. None of these |
| Answer» Correct Answer - B | |
| 22. |
The checkpoints involved in cell cycle regulation areA. `G_(1)`-checkpoint, `G_(2)` and metaphaseB. `G_(0)`-checkpoint, `G_(1)` and anaphaseC. `G_(1)`-checkpoint, `G_(2)` and metaphaseD. `G_(0)`-checkpoint, `G_(1)`and metaphase |
| Answer» Correct Answer - A | |
| 23. |
Assertion: The final stage of meiotic prophase I is diplotene. Reason: Diplotene is marked by terminalisation of chaisamata.A. If both assertion and reason are true and reason is the correct explantion of assertionB. If both assertion and reason are true but reason is not the correct explnantion of assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
|
Answer» Correct Answer - D The final stage of meiotic prophase I is diakinesis. This is marked by terminalisation of chiasmata. During this phase the chromosomes are fully condensed and the meiotic spindle is assembled to prepare the homologous choromosomes for separation. Diakinesis represents end of prophase I and transition to metaphase. |
|
| 24. |
A : The complete disintegration of the nuclear envelope marks the start of metaphase. R : Chromosomes are distinct with two chromatids at this stage.A. IF both Assertion & Reason are true and the reason followed is the correct explanation of the assertion then mark (1).B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark (2).C. If Assertion is true statement but Reason is false, then mark (3).D. If both Assertion and Reason are false statement then mark (4). |
| Answer» Correct Answer - B | |
| 25. |
The point of attachment of microtubules on the chromosomes is called asA. CentromereB. KinetochoreC. ChromatidD. Spindle |
| Answer» Correct Answer - B | |
| 26. |
Ends of chromosomes are attached with nuclear envelope at attachment plate inA. LeptoteneB. ZygoteneC. PachyteneD. Diplotene |
| Answer» Correct Answer - A | |
| 27. |
Actual haploidy in terms of DNA comes inA. metaphase IB. anaphaseC. anaphase IID. cell plate |
| Answer» Correct Answer - C | |
| 28. |
It is oberved that heart cells do not exhibit cell division. Such cells do not divide further and exit... Phase to enter an inactive stage called.... of cell cycle. Fill in the blanks |
|
Answer» It is observed that heart cells do not exhibit cell division. Such cells do not divide further and exit `G_(1)` phase to enter an inactive stage called quiescent stage `(G_(0))` of cell cycle. Muscle cells when a level of maturity, no loner divide and just perform their function all thrugh its life. Similar is the case with nerve cells too which are highly specific and lack the ability to divide once they get specialised. They remain in that state until they die. |
|
| 29. |
Phragmoplast is precursor ofA. leucoplastB. chloroplastC. spindle apparatusD. cell plate |
| Answer» Correct Answer - D | |
| 30. |
Phragmoplast is related toA. division of nucleolusB. cell elongationC. CytokinesisD. assemblage of chromonomes at metaphase. |
|
Answer» Correct Answer - C |
|
| 31. |
Spindle usually persists in the form of ___ during ___ method of cytokinesis.A. phragmoplast, cleavageB. phragmoplast, cell plateC. cell plate, cell plateD. cell plate, cleavage |
|
Answer» Correct Answer - B In higher plants cytokinesis is takes place by cell plate method. In this method small vesicles of Golgi complex are assembled at the equator. Here spindle persists for some time called phragmoplast. All vesicles fuse to form two sheets which enclose a matrix or film. This film becomes solidified to form cell plate or middle lamella. It grows centrifugally and finally comes in contact with lateral walls of parent cell. Now phragmoplast disappear. Cellulose, hemicellulose and pecting are deposited on either side of cells plate. It forms primary cell wall. |
|
| 32. |
Which of these is usually constant for a variety of cells?A. Time for S, `G_(2)` and M phasesB. Time for `G_(1)`C. Time for `G_(2)`D. Time for `G_(1), S and G_(2)` |
| Answer» Correct Answer - A | |
| 33. |
The cell cycle of somatic cell usually consists ofA. long interphase followed by short mitotic phaseB. short interphase and long mitotic phaseC. long interphase and long mitotic phaseD. short interphase |
| Answer» Correct Answer - A | |
| 34. |
During AmitosisA. Spindle apparatus is formedB. Nucleus elongates and divides into two nuclei without equitable chromosome distributionC. Nucleus elongates followed by spindle apparatus formationD. No division of cell occurs |
| Answer» Correct Answer - B | |
| 35. |
Which stage connecting link between Meiosis 1 and Meiosis IIA. lnterphaseB. lnterkinesisC. Generation TimeD. I-phase |
| Answer» Correct Answer - B | |
| 36. |
Root cells of wheat has 6n=42 chromosomes . Which one of the following is the basic chromosome number for wheat ?A. 42B. 21C. 7D. 14 |
|
Answer» Correct Answer - c For wheat, 2n=6x=42. `tehreforex=7` x represetns basic or genomic number. |
|
| 37. |
During mitosis, nuclear Membrane disappear atA. telophaseB. prophaseC. metaphaseD. anaphase |
| Answer» Correct Answer - B | |
| 38. |
The stage of meiosis where centromere separateA. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
| Answer» Correct Answer - D | |
| 39. |
Meiosis-IIA. is not accociated with DNA replicationB. is called intrameiotic interphase or interkinesisC. leads to the separation of chromatids and centromeresD. all of the above |
| Answer» Correct Answer - D | |
| 40. |
Separation of homologous chromosomes at anaphase-I are also known asA. chiasmataB. disjunctionC. terminalisation of chiasmataD. Kinetochore |
| Answer» Correct Answer - B | |
| 41. |
When paternal and maternal chromosomes mutually exchange their materials in cell division, the event is calledA. Bivalent formationB. RecombinationC. SynapsisD. Dyad formation |
| Answer» Correct Answer - A::B | |
| 42. |
Which division is characteristic of cartilage cells, meganucleus of paramoecium and foetal membranes?A. MitosisB. MeiosisC. CryptomitosisD. Amitosis |
| Answer» Correct Answer - A | |
| 43. |
The correct sequence of phases of cell cycle is :A. S,M,`G_(1)` and `G_(2)`B. `G_(1),G_(2)`,S and MC. M,`G_(1)`,G_(2)` and SD. `G_(1),S G_(2)` and M |
| Answer» Correct Answer - D | |
| 44. |
The sources of events by which cells duplicate their genome, synthesize the other components of cell which eventually distribute into two daughter cells is calledA. Quiescent stageB. Generation timeC. Cell cycleD. Kinetochore |
| Answer» Correct Answer - C | |
| 45. |
The phase between the two successive M phase is called asA. MetaphaseB. AnaphaseC. ProphaseD. Interphase |
| Answer» Correct Answer - D | |
| 46. |
The cells which enter _______ phase start differentiating into specific types of cell.A. `G_(1)`B. `G_(2)`C. SD. `G_(0)` |
| Answer» Correct Answer - D | |
| 47. |
A biosynthetic phase where cell organelles duplicate itself isA. InterphaseB. AnaphaseC. ProphaseD. Telophase |
| Answer» Correct Answer - A | |
| 48. |
Non-dividing cells enter theA. `G_(2)` phaseB. M phaseC. `G_(0)` phaseD. S phase |
| Answer» Correct Answer - C | |
| 49. |
In a diploid cell, at which stage of cell cycle, the amount of DNA is doubledA. `G_(1)` and `G_(2)` phaseB. `G_(0)` PhaseC. S, `G_(2)` and M phaseD. S phase |
|
Answer» Correct Answer - D In a diploid cell, at S phase stage of cell cycle, the amount of DNA is doubled. |
|
| 50. |
________ phase synthesizes enzymes required during S phase.A. `G_(2)`B. MC. SD. `G_(1)` |
| Answer» Correct Answer - D | |