AP Bio- Chapters 10&11

A possible sequence of nucleotides in the template strand of DNA that would code for the polypeptide sequence phe-leu-ile-val would be

3' AAA-GAA-TAA-CAA 5'

During translation, chain elongation continues until what happens?

A stop codon is encountered

The nitrogenous base adenine is found in all members of which group?

ATP, RNA, DNA

A frameshift mutation could result from

Either an insertion of a deletion of a base

What is the effect of a nonsense mutation in a gene?

It introduces a stop codon into the mRNA

What is the function of reverse transcriptase in retroviruses?

It uses viral RNA as a template for DNA synthesis

RNA polymerase and DNA polymerase differ in that

RNA polymerase can initiate RNA synthesis, but DNA polymerase requires a primer to initiate DNA synthesis

If you were to observe the activity of methylated DNA, you would expect it to

have turned off or slowed down the process of transcription

A codon

may code for the same amino acid as another codon

What amino acid sequence will be generated based on the following mRNA codon sequence? 5' AUG-UCU-UCG-UUA-UCC-UUG 3'

met-ser-ser-leu-ser-leu

What represents a similarity between RNA and DNA?

nucleotides consisting of a phosphate, sugar, and nitrogenous base

What does the operon model attempt to explain?

the coordinated control of gene expression in bacteria

In biotechnology, genes are commonly introduced into bacterial cells by incubating the cells together with DNA and high concentrations of calcium ions. This is

transformation

The tryptophan operon is a repressible operon that is

turned off whenever tryptophan is added to the growth medium