Exam 17: Expression of Genes

The following question refers to this table of codons. Refer to the figure. Which of the triplets below is a possible anticodon in a tRNA that transports proline to a ribosome?

During the elongation phase of translation, which site in the ribosome represents the first location where a codon pairs with an anticodon?

Which answer correctly compares prokaryotic and eukaryotic codons?

Two mRNAs (mRNA X and mRNA Y) are synthesized with the same exon sequences but poly-A tails of very different lengths. mRNA X is 7,500 bases long. mRNA Y is 6,900 bases long. The mRNA's are added to separate in vitro translation mixtures containing radioactive methionine and the reactions are allowed to proceed for 30 minutes. When the mixtures are analyzed which of the following outcomes will most likely occur?

Use the figure to answer the question. Refer to the metabolic pathway illustrated. If I, II, III, and IV are all required for growth, a bacterial strain that does not make enzyme X would be able to grow on medium supplemented with which of the following nutrient(s)?

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

Which of the following statements describes the effect of a nonsense mutation on a gene?

Which of the following statements correctly describes Archibald Garrod's hypothesis for how "inborn errors of metabolism" such as alkaptonuria occur?

Rank the following mutations with respect to their likelihood of affecting the structure of the polypeptide (from most likely to affect structure to least likely). 1) insertion mutation in the middle of an intron 2) deletion of 3 bases crossing an intron-exon border 3) substitution mutation at the third position of a codon 4) substitution mutation at the second position of a codon

Using the CRISPR-Cas9 system to correct a genetic defect in a mouse brings with it which of the following risks?