When would gas sterilization be most useful?

a. sterilizing bulky heat sensitive items, like mattresses
b. sterilizing a bottle of nutrient broth for microbiology lab
c. cleaning a patients skin in preparation for surgery
d. sterilizing heat sensitive antibiotics


Answer: a. sterilizing bulky heat sensitive items, like mattresses

Biology & Microbiology

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The ________ model was proposed by Mitchison and Kirschner to explain how polymerization and depolymerization of microtubules occur simultaneously.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Reduced O2 (5% to 10%) and increased CO2 (8% to 10%) produce an environmental condition that best suits which type of organism?

a. Aerobes b. Anaerobes c. Capnophiles d. Microaerophiles

Biology & Microbiology

The building blocks of nucleic acids are

a. amino acids. b. fatty acids. c. monosaccharides. d. nucleotides. e. lipids.

Biology & Microbiology

1) The alteration of gene activity without DNA sequence change. _____ 2) The science of making a living cell perform a task considered useful by humans in a controlled way. _____ 3) The RNA "words" are called this. _____ 4) The process of replacing a faulty gene with healthy functional genes. _____ 5) An enzyme that binds with the promoter on DNA and then synthesizes mRNA. _____ 6) According to base-pairing rules, adenine will pair only with this. _____ 7) An individual's complete set of DNA. _____ 8) Enzymes that link the sugars and phosphates of the newly attached nucleotides to form a new strand during DNA replication. _____ 9) According to base-pairing rules, cytosine will pair only with this. _____

A) Thymine B) DNA polymerases C) RNA polymerase D) Codons E) Guanine F) Gene therapy G) Epigenetics H) Biotechnology I) Genome

Biology & Microbiology