AP BIO RNA translation

question 6:

3c-GGC-5c

Which of the following processes occurs when termination of translation takes place?

A stop codon is reached

The genetic code is redundant. What is meant by this statement?

More than one codon can specify the addition of the same amino acid

Which of the following types of mutation, resulting in an error in the mRNA just after the AUG start of translation, is likely to have the most serious effect on the polypeptide product?

a deletion of two nucleotides

Accuracy in the translation of mRNA into the primary structure of a polypeptide depends on specificity in the________________

binding of the anticodon to the codon and the attachment of amino acids to tRNA

What type of bonding is responsible for maintaining the shape of the tRNA molecule?

hydrogen bonding between base pairs

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

it introduces a premature stop codon in the mRNA

Which of the following molecules are required for the process of translation?

mRNA, tRNA, and rRNA

How might a single base substitution in the sequence of a gene affect the amino acid sequence of a protein encoded by the gene?

only a single amino acid could change, because the reading frame would be unaffected

question 5:

proline-threonine

What would be the consequence of a mutation in a bacterial cell that produces a defective aminoacyl-tRNA syntheses that attaches a lysine instead of the normal phenylalanine to tRNAs with the anticodon AAA?

proteins in the cell will include lysine instead of phenylalanine at amino acid positions specified by the codon UUU

The tRNA shown in the figure has its 3c end projecting beyond its 5c end. which of the following processes will occur at this 3c end?

the amino acids binds covalently

Question 14:

the mutation eliminates the stop codon in the third triplet

Which of the following processes is the first event to take place in translation in eukaryotes>

the small subunit of the ribosome recognizes and attaches to the 5c cap of mRNA