Why is it unlikely that genetically engineered strains of bacteria would pose a threat to the environment?
a. Genetically engineered bacteria cannot survive exposure to UV radiation.
b. Genetically engineered strains of bacteria are strictly regulated, making accidental release unlikely.
c. Genetically engineered strains of bacteria cannot survive exposure to oxygen.
d. Genetically engineered strains of bacteria are poor competitors of wild strains.
e. Genetically engineered strains of bacteria require supplemental nutrients to survive
d
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Match the following items with the correct phrases.
_______1. ____________________ is a virulence factor that is found in (and released from) the cell walls of Gram-negative bacteria. _______2. The molecules on the surfaces of host cells that pathogens are able to recognize and attach to are known as receptors or ____________________. _______3. Molecules on the surfaces of pathogens that are able to recognize and bind to molecules on the surfaces of host cells are known as ligands or ____________________. _______4. ____________________ is also known as “spreading factor.” _______5. ____________________ are toxins that destroy white blood cells. a. adhesins b. endotoxin c. hyaluronidase d. integrins e. leukocidins
Place the events illustrating how genes and hormones interact in the development of behavior in the correct order
1. target neurons change intracellularly 2. hormones change genetic activity and enzymatic biochemistry in their target neurons 3. genes code for hormone production 4. animal’s behavior changes
a. 1, 2, 3, 4 b. 3, 2, 1, 4 c. 2, 3, 1, 4 d. 2, 1, 3, 4 e. 3, 1, 2, 4
The inorganic nonprotein components that participate in enzyme catalysis are known as
A. substrates. B. reactants. C. products. D. cofactors. E. coenzymes.
The antifungals known as polyenes interact with ________, a lipid unique to fungus membranes
A) cholesterol B) ergosterol C) mycolic acid D) phospholipid E) glycolic acid