ap bio unit 6 review

In eukaryotes, a cluster of proteins (RNA polymerase II, mediator proteins, etc.) that assemble on the promoter is called the

• transcription initiation complex

• control element

• activator

• protein blobby thing

In eukaryotes, proteins that help the RNA polymerase bind to the regulatory region for transcription are called ____________.

• transcription factors
• topoisomerase
• regulatory genes
• activators

Tags

NGSS.HS-LS1-1

The repressor is the protein product of a(n)

• operator

• regulatory gene

• lac gene

• corepressor

Tags

NGSS.HS-LS1-1

RNA polymerase moves in which direction along the DNA?

• 5' to 3' 
• 3' to 5' along the template strand
• 3' to 5' along nontemplate(coding) strand
• 5' to 3' along the template strand

Which of the follwoing best describes the significance of the TATA box in eukaryotic promoters?

• it is the recognition site for a specific transcription factor
• it sets the reading frame of the mRNA
• it is the recognition site for ribosomal binding
• it signals the end of the nucleotide sequence of the gene

A chemical modification of DNA that does not affect the nucleotide sequence of a gene but makes that gene less likely to be expressed.

• methylation
• acetylation
• transcription
• translation

Which of the following is an example of post-transcriptional control of gene expression?

• the addition of methyl groups to cytosine bases of DNA
• the binding of transcription factors to a promoter
• the removal of introns and splicing together of exons
• gene amplification contributing to cancer

Which of the following events in translation is the first to occur in eukaryotes?

• elongation of the polypeptide
• base pairing of activated methionine-tRNA to AUG of the messenger RNA
• binding of the larger ribosomal subunit to smaller ribosomal subunits
• the small subunit of the ribosome recognizing and attaching to the 5'cap

What must happen to a newly made polypeptide before it can be secreted from a cell?

• it must be translated by a ribosome that remains free of attachment to the ER
• its signal sequence must target it to the ER, after which it goes to the Golgi
• Its signal sequence must be cleaved off
• Its signal sequence must target it to the plasma membrane

What is the correct description of eukaryotic chromosomes?

• many linear pieces of DNA in the cytoplasm

• many linear pieces of DNA in the nucleus

• one circular piece of DNA in the cytoplasm

• many circular pieces of DNA in the nucleus