Which one of the following statements is correct?
A - VCE - SSCE Biology - Question 5 - 2018 - Paper 1
Question 5
Which one of the following statements is correct?
A. Transacetylase, permease and ß-galactosidase are exons that digest allolactose.
B. Section X is the regulatory g... show full transcript
Worked Solution & Example Answer:Which one of the following statements is correct?
A - VCE - SSCE Biology - Question 5 - 2018 - Paper 1
Step 1
A. Transacetylase, permease and ß-galactosidase are exons that digest allolactose.
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Answer
This statement is incorrect because transacetylase, permease, and ß-galactosidase are not exons. They are enzymes that are involved in the metabolism of lactose, but they do not digest allolactose directly.
Step 2
B. Section X is the regulatory gene for the lac operon.
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Answer
This statement is also incorrect. Section X is not a recognized regulatory gene for the lac operon; instead, the lacI gene encodes a repressor that regulates the operon.
Step 3
C. Molecule Q is a repressor protein.
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Answer
This statement is correct. Molecule Q is indeed a repressor protein that binds to the operator region of the lac operon, preventing transcription in the absence of lactose.
Step 4
D. Molecule P is a tRNA molecule.
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Answer
This statement is incorrect as it does not provide relevant information about molecule P in the context of the lac operon or protein synthesis.
