Microbes and Society: Chapter 12 Practice Quiz

Please read each question and select your answer from the choices provided. You must complete all of the questions in order to view your results. At the end of each exam, you have the option to e-mail your results to your instructor. (Kris.. do you want me to turn on this option?)

1: In Griffith’s experiment, the transforming factor that changed a harmless strain of pneumococci into a pathogenic strain was:
	A: toxin
	B: a bacterial virus
	C: repressor protein
	D: DNA

2: The experiment of Hershey and Chase using bacteriophage and E. coli showed that:
	A: DNA alone can direct the synthesis of both nucleic acids and proteins
	B: that some types of viruses can replicate in bacterial cells
	C: heat killed viruses are capable of repairing themselves and causing infection
	D: viral proteins are not needed for a virus to infect a cell

3: The existence of 2 types of nucleic acid, RNA and DNA, was established by:
	A: Wilkins & Franklin
	B: Watson & Crick
	C: Levine & colleagues
	D: Mendel and Morgan

4: Which of the following represents a complementary base pair found in DNA?
	A: G-G
	B: A-T
	C: C-T
	D: A-U

5: Transcription refers to the production of:
	A: DNA from an RNA template
	B: DNA from a DNA template
	C: RNA from a RNA template
	D: RNA from a DNA template

6: The RNA that delivers amino acids to the ribosome for use in protein synthesis is called:
	A: messenger RNA
	B: ribosomal RNA
	C: transfer RNA
	D: shuttle RNA

7: An operon refers to:
	A: a protein that prevents RNA polymerase from reaching structural genes
	B: a protein that binds to a repressor protein, preventing it from binding to the operator gene
	C: a gene that stimulates expression of structural genes
	D: the entire DNA unit for expressing a particular trait

8: Frederick Sanger developed the Sanger method of DNA sequencing, also known as:
	A: cloning
	B: DNA fingerprinting
	C: the chain termination method
	D: genomics

9: Why was the genome sequencing of Saccharomyces cerevisiae considered to be important?
	A: It was the first genome to be completely sequenced.
	B: It was the first microbial genome to be completely sequenced.
	C: It was the first eukaryotic genome to be completely sequenced.
	D: It was the first genome to be completely sequenced in less than 24 hours.

10: The discipline in which the genome is carefully scrutinized to determine how it directs biological activity is referred to as:
	A: genetic engineering
	B: biotechnology
	C: proteomics
	D: bioinformatics

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