NEET 2023 Phase 1 · BiologyCell cyclePrevious Year Question
Among eukaryotes, replication of DNA takes place in
Answer: (B) S phase. Answer: S phase Solution: DNA synthesis/replication occurs only in the S (synthesis) phase of interphase, during which the amount of DNA per cell doubles (2C to 4C) without any change in chromosome number.
- A.M phase
- B.S phase✓
- C.G1 phase
- D.G2 phase
Correct Answer
(B) S phase
Solution & Explanation
Answer: S phase Solution: DNA synthesis/replication occurs only in the S (synthesis) phase of interphase, during which the amount of DNA per cell doubles (2C to 4C) without any change in chromosome number. G1 and G2 are gap phases of growth and protein synthesis with no DNA replication, and M phase is when actual cell division occurs. NCERT Reference: Ch 10, p.121, lines 39-40 — "S or synthesis phase marks the period during which DNA synthesis or replication takes place"
🎯
43,000+ questions in हिंदी & English · one-tap toggle
Open →📚Practice all NEET Biology PYQs chapter-wise →💡Don't get it? Learn the Cell Cycle and Cell Division concepts →Practice NEET 2023 Phase 1 Biology — free, with instant solutions
43,000+ NEET questions solved step-by-step, chapter-wise, in the MedicNEET app.
More NEET PYQ solutions
BiolMatch List I with List II : List-I (Phase of cell cycle) A. G1 phase B. S phase C. G2 Phase D. M phase List-II (Activity) I. Actual cell division occurs II. Cell is metabolically active and continuously grows but does not replicate its DNA III. Synthesis of DNA occurs and the amount of DNA per cell doubles IV. Proteins are synthesized while cell growth continues Choose the correct answer from the options given below :BiolFollowing are the stages of cell division: A. Gap 2 phase B. Cytokinesis C. Synthesis phase D. Karyokinesis E. Gap 1 phase Choose the correct sequence of stages from the options given below:BiolWhich one of the following is the quiescent stage of cell cycle ?BiolGiven are two statements. Statement 1: During G0 phase of cell cycle, the cell is metabolically inactive. Statement 2: The centrosome undergoes duplication during S phase of interphase. In the light of the above statements, choose the most appropriate answer from the options given below:BiolMatch List I with List II: List I A. M Phase B. G2 Phase C. G1 Phase D. G1 Phase List II I. Proteins are synthesized II. Inactive phase III. Interval between mitosis and initiation of DNA replication IV. Equational division Choose the correct answer from the options given below:BiolThe fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after S phase?BiolThe centriole undergoes duplication during:BiolMatch List-I with List-II: List-I (a) S phase (b) G2 phase (c) Quiescent stage (d) G1 phase List-II (i) Proteins are synthesized (ii) Inactive phase (iii) Interval between mitosis and initiation of DNA replication (iv) DNA replication Choose the correct answer from the options given below: