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
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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).
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
The building blocks of nucleic acids are
a. amino acids. b. fatty acids. c. monosaccharides. d. nucleotides. e. lipids.
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