Unit 6 AP Biology Insta-Review (Gene Expression and Regulation)

Front

What is the direction of synthesis for the leading strand during DNA replication?

Back

5' to 3'.

Front

What is the direction of synthesis for the lagging strand during DNA replication?

Back

3' to 5'.

Front

What is the TATA box?

Back

A DNA sequence that indicates where a genetic sequence can be read and decoded; it is rich in thymine (T) and adenine (A).

Front

What effect does adding a methyl group to DNA have on transcription?

Back

It increases condensation which decreases transcription.

Front

How many nucleotides are in a codon?

Back

3.

Front

What is a codon?

Back

A sequence of three nucleotides that together form a unit of genetic code in a DNA or RNA molecule.

Front

Can one codon code for multiple amino acids?

Back

No, one codon codes for only one specific amino acid.

Front

What are the two main types of strands in DNA replication?

Back

Leading strand and lagging strand.

Front

What is the role of RNA polymerase in gene expression?

Back

It synthesizes RNA from a DNA template during transcription.

Front

What is the significance of the promoter region in gene expression?

Back

It is a region of DNA that initiates transcription of a particular gene.