Regulation of transcription and translation KS5

The lac repressor mechanism is found in which type of organism?

• Fungi

• Bacteria

• Animals

• Plants

If lactose is present, which enzyme is made?

• Beta galactosidase

• Lactose permease

• Transacetylase

• None of the above

The production of beta-galactosidase is controlled by:

• A regulatory protein

• siRNA

• RNAi

• A transcription factor

What does lactose bind to enable the transcription of the gene that codes for beta galactosidase?

• Lac operon

• Glucose

• Promoter

• Lac repressor

Name the two scientists who proposed the double-helix model of DNA

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What is a chromosome made from in eukaryotic cells?

• DNA

• DNA and histones

• DNA and transcription factors

• DNA and RNA

If genes determine the observable features of an organism, which of the below does not influence the expression of these genes?

• Environment

• Genetics

• Mutagens

• Transcription Factors

Which of the following defines a gene as being expressed in a cell:

• Transcription and translation

• No mutations, transcription

• No mutations, transcription, translation

• Transcription, translation, protein synthesis

What attaches to DNA at the start of a gene to begin transcription?

• DNA polymerase

• Transcription facors

• DNA helicase

• RNA polymerase