261. During meiosis I, the chromosomes start pairing at

A Leptotene
B Zygotene
C Pachytene
D Diplotene
Answer :   Zygotene
Discuss Question

262. Hydrolytic enzymes are stored in

A Golgi bodies
B Lysosomes
C Endoplasmic reticulum
D Mitochondria
Answer :   Lysosomes
Discuss Question

263. Longest phase of cell cycle is

A Prophase
B Telophase
C G2
D G2
Answer :   G2
Discuss Question

264. In meiosis, the daughter cells differ from parent cell as well as amongst themselves due to

A segregation, independent assortment and crossing over
B segregation and crossing over
C independent assortment and crossing over
D segregation and independent assortment
Answer :   segregation, independent assortment and crossing over
Discuss Question

265. DNA synthesis takes place in

A S phase
B G1 phase
C G2 phase
D None of the above
Answer :   S phase
Discuss Question

266. Which of the following not occur during condensation of chromosomes

A Unfolding of protein molecules
B Coiling of DNA
C Dehydration
D Hydration
Answer :   Hydration
Discuss Question

267. Colchicine prevents the mitosis of cell at

A Prophase stage
B Anaphase stage
C Metaphase stage
D Metaphase stage
Answer :   Metaphase stage
Discuss Question

268. Synthesis of proteins occurs during

A G1
B G2
C S
D All of the above
Answer :   All of the above
Discuss Question

269. Crossing over takes place in

A Zygotene
B Pachytene
C Diplotene
D Diakinesis
Answer :   Pachytene
Discuss Question

270. If crossing over occurs at two strand stage then percentage of crossing over is

A 50%
B 60%
C 70%
D 100%
Answer :   100%
Discuss Question

Practice More MCQ Question on Biology Section

BotanyThe Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisonTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and DevelopmentReproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental IssuesBotany Miscellaneous
ZoologyAnimal KingdomStructural Organisation in AnimalsBiomoleculesDigestion and AbsorptionBreathing and Exchange of GasesBody Fluids and CirculationExcretory Products and Their EliminationLocomotion and MovementNeural Control and CoordinationChemical Coordination and IntegrationHuman ReproductionReproductive HealthEvolutionHuman Health and DiseasesBiotechnology: Principles and ProcessesBiotechnology and its ApplicationsZoology Miscellaneous