A worker in a cheese-making facility argued that whey, a nutrient-rich by-product of the process, should be dumped into a nearby pond to serve as fish food.Is this a good idea or a bad one, and why?
A. It's a great idea! Let's feed the fish and help them multiply!
B. Bad idea-the fish won't be able to eat the whey, so it will sit there rotting and pollute the waters, making them uninhabitable for the fish.
C. Bad idea-bacteria would thrive on this rich nutrient source and multiply readily. As they multiply, they'll use the oxygen in the water to harvest the energy from the whey, depleting it. As the oxygen depletes below a certain point, the fish (and perhaps other organisms) will not be able to survive.
D. Great idea! This will not only feed the fish, but also microbes and other small organisms. It'll enhance the entire food chain and help all of them!
C
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The slow-growing organism Trichophyton rubrum produces a flat or heaped-up colony, generally white to reddish with a cottony or velvety surface. The cherry-red color is best observed on the reverse side of the colony. This organism is capable of infecting which of the following?
a. Hair and nails b. Skin and nails c. Hair and skin d. Hair, skin, and nails
Many breast cancers are associated with mutations in the BRCA1 gene. Explain the difference between sporadic and
familial breast cancer caused by this gene at a molecular level.
What will be an ideal response?Taq polymerase is a DNA polymerase enzyme that demonstrates maximal activity at 72oC. The organism from which this enzyme was isolated would most likely be classified as a:
psychrotroph psychrophile mesophile thermophile hyperthermophile
What will happen when the Na+ channel is open?
a) There will be net movement of Na+ out of the cell through the channel b) There will be no net movement of Na+ through the channel c) There will be net movement of Na+ into the cell through the channel