Unit Test Answers

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

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

Which is not something that occurs in translation?

All of the following would be visible on a karyotype except

Missense, nonsense, and silent mutations are examples of which type of mutation?

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

Many different types of mutations can occur within the body. An individual experiences a mutation that changes a base in a mRNA strand, but during translation the mRNA strand still creates the same protein. Which type of mutation is responsible for the change in the mRNA base?

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?

Which does not occur during translation?

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 step in transcription occurs first?

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?

Which base is found only in DNA?

Karyotypes can be studied to determine an organism’s chromosomal makeup and to detect genetic defects. Down syndrome is a genetic disorder that is also called trisomy 21. What would trisomy 21 look like in a karyotype?

What does a karyotype show?

Which best summarizes the process of protein synthesis?

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Which is a frameshift mutation?

A mutation causes a sequence of DNA that has the nucleotides TTG to be changed to TCG. The resulting protein has a different sequence of amino acids. Which type of mutation is this?

How many genes make up the human genome?

Which accurately describes the relationship between cancer risk and exposure to mutagens?

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

Which best describes a codon?

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

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Which represents a strand of RNA bases?

Photo 51 is a picture of the structure of DNA that was used to create a model of DNA. Who created the photo?

Which of these is the primary site of protein synthesis?

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 must occur for protein translation to begin?

Which is a purpose for which a pedigree chart might be prepared?

Which describes something that occurs during translation?

Which best describes a centromere?

Which statement is scientifically based?

Which flowchart correctly lists the structures in order from smallest to largest?

Which discovery is attributed to Phoebus Levene?