During winter months in temperate environments organisms can die from:
a. high rain fall.
b. freezing.
c. low sunlight.
d. increased predation.
e. increased pH level.
B
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The minimum lethal concentration (MLC) is the lowest concentration of drug from which organisms fail to recover when removed from the drug.
Answer the following statement true (T) or false (F)
Proteins isolated from bacteria and used in recombinant DNA technology to cut DNA at specific sequences are
A) restriction enzymes. B) bacteriophage enzymes. C) plasmids. D) methylating enzymes.
Duchenne muscular dystrophy is caused by
a. a mutation that weakens the cytoskeleton of the muscle fiber. b. a mutation that weakens myofibrils. c. a mutation in the X and Y chromosome. d. a mutation that disrupts the sarcomere. e. a mutation that increases the transmission of force.
Which of the following is responsible for stimulating the release of pancreatic juice into the small intestine?
A) Gastrin B) Cholecystokinin C) Pepsin D) Ghrelin E) Leptin