Cell Cycle and Cell Division for NEET UG
Cells divide to grow, repair and reproduce. Mitosis makes identical copies; meiosis halves the chromosome number to make gametes. Knowing the stages and DNA amounts answers most questions.
BiologyClass 1183 MCQs2 lessons13 flashcards2 memory tricks
Practise Cell Cycle and Cell Division free
What you'll learn
- The cell cycle and mitosis
Describe the phases of the cell cycle and the stages of mitosis. - Meiosis
Explain how meiosis halves the chromosome number and creates variation.
Memory tricks
Prophase, Metaphase, Anaphase, Telophase, followed by cytokinesis.
Leptotene, Zygotene (synapsis), Pachytene (crossing over), Diplotene (chiasmata visible), Diakinesis.
Try 3 NEET-style questions
Q1. In plant cells, cytokinesis by cell plate formation
- starts at the cell periphery as a furrow and moves inward
- starts in the centre of the cell and grows outward to meet the existing lateral walls
- occurs only in haploid cells
- does not form any wall
Show answer
Answer: (2) starts in the centre of the cell and grows outward to meet the existing lateral walls
Wall formation in plant cells starts in the centre and grows outward to meet the lateral walls. The cell plate becomes the middle lamella between the two new cells.
Q2. Terminalisation of chiasmata takes place during
- leptotene
- zygotene
- diplotene
- diakinesis
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Answer: (4) diakinesis
In diakinesis the chiasmata move towards the chromosome ends (terminalisation), the chromosomes condense fully and the spindle forms.
Q3. Mitosis is called an equational division because
- it halves the chromosome number of the cell
- it takes place only in gamete-forming cells
- it produces four daughter cells from one
- daughter cells keep the parent's chromosome number
Show answer
Answer: (4) daughter cells keep the parent's chromosome number
In mitosis the chromosome number of the parent is conserved in the daughter cells.
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