The effector for the Lac repressor protein is:
A. lactose.
B. allolactose.
C. glucose.
D. ?-galactosidase.
B
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Which of the following is(are) considered when selecting a germicidal chemical?
A. Toxicity B. Cost C. Compatibility with the material being treated D. Environmental impact E. All of the choices are correct.
Why (if you are careful) are you able to float a needle on the surface of water?
A) Water has adhesive properties. B) The surface tension that is a result of water's cohesive properties makes this possible. C) The covalent bonds that hold a water molecule together make this possible. D) A single needle is less dense than water.
The resolution of a light microscope is determined by the equation
a. R = 0.61(?)(NA) b. R = 0.61(NA) divided by (?) c. R = 0.61(?) divided by (NA) d. R = 0.61 divided by (?)(NA)
________ hormone stimulates the male gonads to produce testosterone and triggers ovulation in females.
A. Growth B. Follicle-stimulating C. Adrenocorticotropic D. Luteinizing