Exam 12: Gene Structure Expression, and Mutation

Where does precursor-mRNA (pre-mRNA) typically exist?

The alpha-amanitin toxin exerts its toxic effects by blocking which of the following?

Which of the following types of RNA is typically found as a strand that is about 75 to 90 bases long and folds into a structure with four double-helical segments?

Which of the following best defines what occurs during transcription?

During translation, which molecule is used to bind tRNA to the codon in the A site?

Suppose that the first part of a new polypeptide chain being produced in a eukaryotic cell does NOT have a signal peptide. Where would this polypeptide be located within the cell as it is maturing?

How many proteins are specified in the genetic code?

Genetic Code Table -In the genetic code table, the incorporation of which amino acid is directed by the start codon for translation?

How is the reading frame established during translation?

Which of the following describes a polysome?

During translation, where does the energy for translocation come from?

Suppose that a DNA change results in the substitution of one codon for another, and the new codon specifies a stop codon where it did NOT previously. What type of mutation has occurred?

Which process occurs in the cytoplasm of a eukaryotic cell?

For each item or event, indicate the process it is associated with. -tRNA

Relative to the mRNA, what move(s) during translocation?

Describe the process of mRNA splicing.

How many letters are in the RNA "alphabet" of the genetic code?

Which of the following best defines what occurs during translation?

For each item or event, indicate the process it is associated with. -TATA box

Which gene sequence elements are present in prokaryotes?