Which Cell is the Cancer Cell?

Herbie is a typical American college freshman who loves to eat. His second most favorite food is hotdogs. He cuts them into his Kraft macaroni and cheese at a 1:1 ratio, going through a score of hotdogs each week. He doesn't know his brand is preserved with sodium nitrite, but his stomach is slowly finding out as it's acid converts the sodium nitrite to nitrous acid, a weak mutagen. In the lining of Herbie's stomach three little cells each experience a mutation in their DNA and it happens to be in the very same gene--a kinase gene called src. (Src is an example of what Dr. Howard Temin called a "proto-oncogene.) But the three little cells each experienced a different kind of mutation in that... click for more

LDH: Lactose Dehydrogenase

1. Please explain the data attached and why the percentages in each are as so. 2. Which sample has the highest and lowest amount of polypeptide chain H? Explain

Relationship between light and wakefulness

Consider the lettered sequence of relationships listed below. They describe elements of a response your body makes to increasing light levels: a) the thyroid gland secretes more thyroxin b) pineal gland decreases melatonin secretion c) nerve impulse travels over optic nerves to suprachiastic nuclei d) hypothalamus gland sends increased hormonal signals to thyroid gland e) nerve impulses originate in suprachiastic nuclei and travel to pineal gland f) light photons strike retina of the eye g) basal metabolism rate in body cells picks up; "you feel ready to rise and shine" h) thyroxin binds to cell receptors all over the body i) nerve impulses originate in the rod cells of the retin... click for more

Prokaryotes and Eukaryotes. What are the differences between them?

What are some of the differences between Prokaryotes and Eukaryotes. Give two examples of each.

Animals and plants

Animals and plants. Differences between them and two examples of each.