1 Which of the following statements is incorrect regarding t

1. Which of the following statements is incorrect regarding the Ames test?

a. Liver enzymes are added to allow for possible conversions that may increase the mutagenicity of the test substance.

b. agar plates supplemented with histidine are used to test whether the test substance has caused mutations

c. the Salmonella strain used for the test is deficient in its ability to synthesize

d. a control is necessary to determine the background level revision

e. the suspected mutagen is omitted from the negative control sample

2. Which of the following would not have a nucleotide consensus sequence

a. operator

b. promoter

c.repressor protein

d.ribosomes binding site

e. all of the above have consensus sequences.

3. Transcription in prokaryotes and eukaryotes is similar in that:

a. compaction and decompaction of nucleosomes controls transcription

b. both are regulated by proteins that bind to DNA elements that influence transcription

c. transcription and translation can occur simultaneously

d. both are contained within cell nucleuse.

e. none of the above

Solution

1.Answer; d. a control is necessary to determine the background level revision

2.Answer e. all of the above have consensus sequences.

3.Answer e. none of the above