The graph shows the quantity of DNA in one mammalian cell over time - HSC - SSCE Biology - Question 14 - 2020 - Paper 1
Question 14
The graph shows the quantity of DNA in one mammalian cell over time.
Which of the statements about the cell’s activity is correct?
A. The cell is dividing during s... show full transcript
Worked Solution & Example Answer:The graph shows the quantity of DNA in one mammalian cell over time - HSC - SSCE Biology - Question 14 - 2020 - Paper 1
Step 1
A. The cell is dividing during section O.
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Answer
During section O, the graph shows an increase in the quantity of DNA, indicating that DNA replication is occurring as the cell prepares to divide. Therefore, this statement is correct.
Step 2
B. The cell is inactive for the first two hours.
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Answer
The graph suggests that the DNA quantity remains constant during the first two hours, which could be interpreted as inactivity. However, cells often undergo metabolic activities even when DNA quantity does not change. This statement is somewhat misleading.
Step 3
C. The cell takes one hour to replicate its DNA.
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Answer
The graph shows that the quantity of DNA increases significantly during section O, which might imply that DNA replication occurs over time, but it does not specifically state that it takes one hour. Thus, this statement cannot be confirmed.
Step 4
D. The cell becomes diploid only during section N.
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Answer
The cell is likely already diploid before section N since the DNA content increases by the end of section O. The statement that it becomes diploid only during section N is inaccurate.
