Question

2. Study the table below that summarises the flow of genetic information in a cell, and answer the questions below: DNA helix с GCG GCT TAC TAA D strand strand E F B 5 3 mRNA strand Peptide sequence Ala 2.1 Name the theory that explains the flow of genetic material in a cell. 2.2 Compete the table by providing the sequence for the second DNA strand and the mRNA strand. Also provide labels (A and B) and polarity (C, D, E, F) for each strand. 2.3 Provide the amino acid sequence encoded by this DNA molecule.

Answer 1

2.1) This theory is called as the 'central dogma'.

2.2)

Second DNA strand: CGC CGA ATG ATT (as per rules of Watson Crick base pairing)

mRNA: GCG GCU UAC UAA (as per rules of complimentarity, T is replaced with U in mRNA)

A: Coding strand (has same sequence as mRNA)

B: Non-coding strand (the template strand for mRNA)

C: 5'

D: 3'

E: 3'

F: 5'

2.3)

Protein: Ala Ala Tyr (stop)

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