AP Biology Unit 6 Review

Front

What type of operon is the trp operon in E. Coli?

Back

Repressible operon - it is turned off when tryptophan is present, as it binds to the repressor protein.

Front

What describes the human globin gene family?

Back

Identical or similar genes have evolved by gene duplication.

Front

What is the role of primase in DNA replication?

Back

Primase adds a small RNA 'primer' to allow DNA polymerase to begin synthesizing the daughter strands.

Front

How can humans have relatively few genes compared to their complexity?

Back

More than one polypeptide can be produced from a gene by alternative gene splicing.

Front

What type of molecule helps turn on specific genes?

Back

Inducers - they activate gene expression.

Front

What is the function of helicase in DNA replication?

Back

Helicase unwinds the DNA double helix to separate the parent strands.

Front

What is the role of DNA polymerase during DNA replication?

Back

DNA polymerase adds nucleotides to synthesize the daughter strands.

Front

What are introns and their significance in gene expression?

Back

Introns are non-coding sequences in a gene that can regulate gene expression and contribute to alternative splicing.

Front

What is alternative splicing?

Back

Alternative splicing is a process that allows a single gene to produce multiple polypeptides by including or excluding certain exons.

Front

What is a pseudogene?

Back

A pseudogene is a nonfunctional segment of DNA that resembles a functional gene but has lost its ability to code for a protein.