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Regulation of Gene Expression

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Questions and Answers

Which process is primarily responsible for the lac operon in gene regulation?

Transcription of structural genes (correct)

Cell division

DNA replication

Protein translation

In the absence of lactose, what state is the lac operon in?

Induced

Activated

Repressed (correct)

Mutated

Which molecule acts as the inducer of the lac operon?

Lac repressor

Lactose (correct)

Glucose

RNA polymerase

Which enzyme is responsible for breaking down lactose in the lac operon?

Beta-galactosidase Signup and view all the answers

Which part of the lac operon acts as an on/off switch for transcription?

Operator Signup and view all the answers

Which enzyme is responsible for unwinding the DNA double helix during replication?

DNA helicase Signup and view all the answers

During DNA synthesis, adenine (A) pairs with:

Thymine (T) Signup and view all the answers

What is the primary enzyme responsible for DNA synthesis?

DNA polymerase Signup and view all the answers

Which direction does DNA synthesis occur in?

5' to 3' Signup and view all the answers

Which of the following is not required for DNA synthesis?

Ribosome Signup and view all the answers