2024HSCShort answer

Q30 (a)

3 marks

Question

The diagram shows a simplified version of the process of polypeptide synthesis.
Compare Process A with DNA replication.

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Solution

Criteria	Marks
Provides a sound comparison of the processes of transcription and DNA replication	3
Demonstrates some understanding of the process of transcription and DNA replication	2
Provides some relevant information	1

Sample answer:

Both process A (transcription) and DNA replication involve unwinding of DNA double strand to produce complementary strand. In replication, DNA is copied to produce two identical strands of DNA whereas in transcription, DNA is copied to produce single strand mRNA.

Supplied marking guidance · human reviewed

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Syllabus alignment

Module 5 · Heredity

Cell ReplicationModel mitosis, meiosis and DNA replication using nucleotide pairing and bonding.
DNA and Polypeptide SynthesisModel transcription and translation, including the roles of mRNA and tRNA.

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