A metabolic reaction will most likely reverse
itself under which of the following
circumstances?
a. when the pH is too high.
b. when the temperature is too low.
c. when the reactant concentration is too high.
d. when the product concentration is too high.
e. when the enzyme concentration is too high
D
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Pasteurization of milk
A. reduces microbial growth by decreasing availability of water. B. usually eliminates all disease-causing organisms. C. is a method for sterilization of food items. D. is no longer used for food processing in the United States.
The coronary sinus drains blood directly into the:a
inferior vena cava. b. superior vena cava. c. left atrium. d. right atrium. e. coronary arteries.
Synthesis of cDNA requires the use of
A) DNA ligase. B) agarose. C) reverse transcriptase. D) restriction enzymes. E) fluorescent synthetic nucleotides.
Cheetahs are not a healthy species. Several million years ago they were widespread in Africa and Asia, but their numbers fell drastically during the last ice age and again when they were hunted to near extinction in the nineteenth century. Now, they
suffer from low survivorship (a large number of animals dying), poor sperm quality, and greater susceptibility to disease. Normally, an animal will reject tissue transplanted from another animal, but cheetahs will not reject tissue grafted on to them from another cheetah. What happened to the cheetah? How did their genetic variation change? Where does genetic variation ultimately come from? What mechanism can maintain and increase genetic variation in natural populations? What will be an ideal response?