In humans, the central nervous system consists of the ________, which is housed in the ________ and the ________, which is housed in the ________.
A. brain; vertebral column; spinal cord; skull
B. brain; skull; spinal cord; vertebral column
C. spinal cord; vertebral column; sensory neurons; limbs
D. peripheral nervous system; limbs; brain; skull
Answer: B
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What occurs during the annealing stage of a PCR reaction?
A. The DNA strands separate B. The DNA polymerase copies the template DNA C. The primers bind to complementary sequences of the template DNA D. The reaction stops
Sulfa drugs like Bactrim, given for bacterial infections, inhibit bacteria by blocking folic acid synthesis. The precursor molecule of folic acid is para-amino benzoic acid (PABA). Interestingly, PABA has a structure very similar to a sulfa drug. If a sulfa drug is present, the bacterial enzyme will bind the sulfa drug because of structural similarity. This is an example of ________.
A. competitive inhibition B. noncompetitive inhibition C. catabolite repression D. enzyme repression E. enzyme induction
When the birth rate plus immigration equals the death rate plus emigration the result is ____
a. logistic growth b. exponential growth c. population saturation d. zero population growth e. geometric growth
Which method of microbial control destroys microorganisms by oxidation of cells?
A. use of glutaraldehyde B. incineration C. steam autoclave D. use of UV radiation