BIOL 2051 Microbio Lab Midterm Exam Brininstool Questions with 100% Verified Answers Latest Update

BIOL 2051 Microbio Lab Midterm Exam Brininstool
Questions with 100% Verified Answers Latest Update
Question: complex medium

Answer:

composed of digest of chemically undefined substances

Question: defined medium

Answer:

precise chemical composition is known

Question: agar is extracted from ...

Answer:

Rhodophyta (red algae)

Question: after heating to 100 deg, it will solidify at 40-42 deg and not remelt until it
reaches ____ deg

Answer:

80-90

Question: plates are primarily used for...

Answer:

isolation of microorganisms, streak plates

Question: deeps are used for ________ growth

Answer:

anaerobic

Question: slants are used for..

Answer:

maintenance of stock cultures

Question: How do sterilization and pasteurization differ?

Answer:

sterilization is killing or removal of all living organisms and viruses. involves high heat and
pressure via autoclaving. pasteurization involves gentle heating

Question: what can kill endospores?

, Answer:

autoclave

Question: an autoclave is heated to ___deg C at ___ psi for at least __ min

Answer:

121, 15, 15

Question: how would you remove bacteria from beer?

Answer:

filtration

Question: what type of sterilization uses electromagnetic radiation?

Answer:

cold sterilization

Question:

Answer:


Question: what type of sterilization uses ethylene oxide?

Answer:

cold sterilization

Question: what type of sterilization uses UV radiation to create thymine dimers?

Answer:

cold sterilization

Question: what type of sterilization is used on plastic objects such as Petri dishes?

Answer:

cold sterilization

Question: how does dry heat sterilization kill bacteria?

Answer:

through oxidation effects

Question: what is the most effective sterilization technique that is used in labs?

Answer: