DNA Mutations — Unit test Answers

James is working with the lac operon of Escherichia coli (E. coli). He places the bacteria on a plate of growth media. Based on the current understanding of this operon, which hypothesis would be useful for James to test?

What must occur for protein translation to begin?

How many genes make up the human genome?

Maria is concerned because she has been exposed to a small amount of radiation during an X-ray. What is her doctor most likely to tell her?

Which represents a strand of RNA bases?

Which best summarizes the process of protein synthesis?

What was Friedrich Miescher's contribution to the discovery of the genetic code?

Which is a frameshift mutation?

Which of the following correctly organizes these genetic terms in order from smallest to largest?

Which best matches a type of genetic material with its description?

Which describes something that occurs during translation?

Which is an arrangement of genes consisting of an operator, a promoter, and a repressor?

Which of these is the primary site of protein synthesis?

A forensic scientist is trying to find out the number of adenine bases in the DNA sample that he obtained from a crime scene.What can he assume about the number of adenine?

Many different types of mutations can occur within the body. Cystic fibrosis is a genetic disorder that is caused by different mutations within the CFTR gene. One mutation in the CFTR gene that leads to cystic fibrosis causes translation to end earlier in the gene sequence. Which type of mutation causes this translation error that leads to cystic fibrosis?

What can a person do to limit exposure to X-rays?

A point mutation changes the DNA sequence CGA to CGT, but the same protein is still produced. Which point mutation occurred?

What was Marshall Nirenberg and Heinrich Matthaei’s contribution to our current understanding of the genetic code?

Which occurs during transcription?

According to Chargaff's rule, base pairing in DNA should resemble which of the following?