Answer Options:
True
False
Answer: True
Question: It is important to wash your hands with soap and water upon entering the laboratory, but unnecessary before leaving the laboratory.
Answer Options:
True
False
Answer: False
Question: The phases of a typical bacterial growth curve, in order, are:
Answer Options:
I, II, III, IV
lag, stationary, exponential, death
lag, exponential, stationary, death
Answer: lag, exponential, stationary, death
Question: Which of the following is an environment where an oligotroph might be found? human large intestine open ocean waste water coastal freshwater
Answer Options:
human large intestine
open ocean
waste water
coastal freshwater
Answer: open ocean
Question: All bacterial cells have:
Answer Options:
Endospores
Flagella
Plasmids
A chromosome
Mitochondria
Answer: A chromosome
Question: The disinfectant used to wipe down the laboratory bench every class period is effective at sterilizing the bench.
Answer Options:
True
False
Answer: False
Question: Which of the following characteristics is NOT descriptive of the coliform group of bacteria?
Answer Options:
Spore forming
Gram negative
Rod shaped cell
Lactose fermenting
Answer: Spore forming
Question: β-Galactosidase is a constitutive enzyme that breaks down lactose.
Answer Options:
True
False
Answer: True
Question: Endo agar is both selective and differential. The agar selects for __________ bacteria and differentiates those that grow by their ability to __________.
Answer Options:
Gram-positive, ferment lactose
Gram-negative, ferment lactose
Acid-fast, produce endospores
Aerobic, reduce nitrate
Answer: Gram-negative, ferment lactose
Question: Bobtail squid:
Answer Options:
Acquire new symbionts every day
Expel 5% of their symbionts every morning at dawn
Expel 95% of their symbionts every day at dawn
Don’t have symbionts
Answer: Expel 95% of their symbionts every day at dawn
Question: A characteristic that distinguishes mutant bacterial cells from non-mutant cells is called _______.
Answer Options:
mutation rate
chromosome
genetic marker
natural selection
Answer: genetic marker
Question: True or False: Prokaryotes have membrane-bound organelles.
Answer Options:
True
False
Answer: False
Question: After conducting the above experiment, you determined your organism was Gram negative. What experimental observation lead to this determination?
Answer Options:
Bubble production
No string formation
String formation
Color change
Answer: No string formation