You have never seen a jar of jelly contaminated with microbial growth, even though it is used for months at a time. Which is the best explanation?
A. A variety of chemicals are added to jelly to make it inhospitable for bacteria.
B. Jelly is pasteurized.
C. Jelly has a high osmotic pressure.
D. Jelly is filter sterilized.
Answer: C
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Base your answers to the questions below on the following information:
Using the patch clamp technique, a researcher measures a single channel in a membrane. The receptor channel passes 3 pA (picoamperes) of ionic current over a period of 8 msec at -60 mV; 1 pA = 10 -12 ampere. An electrical current of 1 A is approximately 6 x 1018 electrical charges per second; how many ions pass through the channel when it is open? A) 144,000 ions B) 2400 ions C) 8,640,000 ions D) 8640 ions E) You cannot determine this from the information given.
Per molecule of glucose, oxidation occurs ____ times during the conversion of pyruvate to acetyl CoA
a. 1 b. 2 c. 3 d. 4 e. 5
Red tides and extensive fish kills are caused by
population blooms of a. Euglena. b. specific dinoflagellates. c. diatoms. d. Plasmodium. e. fish.
Runs through core of osteon, contains blood vessels and nerve fibers.
What will be an ideal response?