Biology · CELL CYCLE AND CELL DIVISION

Consider the following statements regarding the eukaryotic cell cycle: (A) In G₁ phase, the cell is metabolically active and continuously grows without DNA replication. (B) In S phase, DNA content per cell doubles, but the chromosome number remains unchanged. (C) Centriole duplication in animal cells occurs in the nucleus during G₂ phase. (D) In adult animals, heart cells do not appear to exhibit division and exist in quiescent stage (G₀). Which of the above statements are correct?

Correct answer · Option 2

(A), (B) and (D) only

Centriole duplicates in the cytoplasm (not nucleus) during S phase (not G₂), making statement (C) incorrect while (A), (B), and (D) are correct.