Practice free Cell cycle and Cell Divisions (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Among eukaryotes, replication of DNA takes place in:
DNA replication occurs in the Synthesis (S) phase of interphase.
Which of the following stages of meiosis involves division of centromere?
Centromeres split and sister chromatids separate in Anaphase II.
The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis?
Recombination nodules appear in Pachytene (crossing over occurs here).
Match List I with List II:
| List I | List II |
|---|---|
| A. M Phase | I. Proteins are synthesized |
| B. G₂ Phase | II. Inactive phase |
| C. Quiescent stage | III. Interval between mitosis and initiation of DNA replication |
| D. G₁ Phase | IV. Equational division |
M phase = equational division; G₂ = proteins synth; Quiescent = inactive (G₀); G₁ = between M and S.
Spindle fibers attach to kinetochores of chromosomes during
Spindle attachment to kinetochores and alignment at the metaphase plate occur during metaphase.
Given below are two statements:
Statement I: Chromosomes become gradually visible under light microscope during leptotene stage.
Statement II: The beginning of diplotene stage is recognized by dissolution of synaptonemal complex.
In the light of the above statements, choose the correct answer from the options given below:
Both are standard descriptions of meiotic prophase-I sub-stages.
What is the main function of the spindle fibers during mitosis?
Spindle fibres attach to centromeres and pull the sister chromatids (chromosomes) to opposite poles during mitosis.
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