Exam 17: From Gene to Protein

A mutant bacterial cell has a defective aminoacyl synthetase that attaches a lysine to tRNAs with the anticodon AAA instead of the normal phenylalanine. The consequence of this for the cell will be that

The following questions refer to this table of codons. -A peptide has the sequence NH₂-phe-pro-lys-gly-phe-pro-COOH. Which of the following sequences in the coding strand of the DNA could code for this peptide?

The most commonly occurring mutation in people with cystic fibrosis is a deletion of a single codon. This results in

Use the following figure to answer the questions below. -What type of bonding is responsible for maintaining the shape of the tRNA molecule?

Which of the following is a function of a poly-A signal sequence?

In eukaryotes there are several different types of RNA polymerase. Which type is involved in transcription of mRNA for a globin protein?

Which of the following provides some evidence that RNA probably evolved before DNA?

What is a ribozyme?

The molecule that links the genotype and phenotype of an organism, is (are)

Alternative RNA splicing

Use the following information to answer the next few questions. A transfer RNA (#1) attached to the amino acid lysine enters the ribosome. The lysine binds to the growing polypeptide on the other tRNA (#2) in the ribosome already. -Where does tRNA #2 move to after this bonding of lysine to the polypeptide?