Microbes and Society: Chapter 8 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: An enzyme that acts as “biochemical scissors” to cut bacterial DNA at a specific location is called a(n):
	A: polymerase
	B: ligase
	C: endonuclease
	D: bacteriocin

2: A plasmid is a(n):
	A: extrachromosomal piece of DNA that might confer a selective advantage to a microbe
	B: chromosomal site to which genetic activity can be traced
	C: body found in the cytoplasm that directs the union of amino acids to form a protein
	D: molecule that carries the genetic message of the chromosomal DNA

3: Small segments of DNA that have the ability to move from one position to another in the bacterial chromosome are called:
	A: mutations
	B: loci
	C: Okazaki fragments
	D: transposons

4: Conjugation refers to the process by which:
	A: a virus carries random DNA fragments from a donor bacterium to a recipient bacterium
	B: a virus carries specific genes from a donor bacterium to a recipient bacterium
	C: a donor bacterial cell transfers some of its genetic material to a recipient bacterium
	D: live bacteria acquire DNA fragments from the environment

5: Conjugation, transduction, and transformation are methods by which ________________ can transfer their genes.
	A: viruses
	B: bacteria
	C: plants
	D: animals

6: The hairlike fibers used by bacteria to transfer an F factor from one cell to another are called:
	A: sex pili
	B: cilia
	C: flagella
	D: none of the above

7: The chromosome of bacteria consists of:
	A: linear DNA with a protein support and a surrounding membrane
	B: DNA in a double helix in a closed loop
	C: small segments of DNA forming a V-shape
	D: a combination of DNA and RNA interwoven together

8: After replication of the bacterial chromosome, the new DNA contains:
	A: 2 newly synthesized strands of DNA copied from the original parent strands
	B: one strand of parent DNA along with one newly synthesized strand of DNA
	C: small segments of parent DNA interspersed with newly synthesized segments of DNA
	D: any one of the above can occur

9: If the F factor attaches to the chromosome, the strain of bacterium donating the DNA is called a:
	A: bacteriophage
	B: F+ strain
	C: high frequency of recombination strain
	D: transduced strain

10: A plasmid consisting of bacterial DNA and penguin DNA would be called a:
	A: mutant
	B: competence factor
	C: chimera
	D: F factor

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