Chewing
1.physically and mechanically breaks up food.
2.aids in forming food into a consistency suitable for swallowing.
3.increases the surface area of food exposed to digestive enzymes.
4.actually mixes some enzymes with food.
5.all of the choices
5
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Which of the following uses dsRNA as the genome?
A. Poxvirus B. Rotavirus C. Parvovirus D. Bunyavirus
The fate of the embryonic germ layers is:
A. The endoderm forms the gut, the ectoderm forms the epidermis and parts of the nervous system, and the mesoderm forms muscles and most internal organs. B. The endoderm forms the gut, the ectoderm forms the reproductive tract and endocrine system, and the mesoderm forms muscles and most internal organs. C. The endoderm forms the inner part of all internal organs, the mesoderm forms the middle parts, and the ectoderm forms the outer coverings. D. The layers are sequential structures that all disappear during development, with the endoderm appearing first and then is replaced by the mesoderm, which in turn is supplanted by the ectoderm. E. The endoderm is an embryonic structure that disappears early, whereas the ectoderm persists as the skin and the mesoderm as the internal organs.
What is the function of the MutS protein in methyl-directed mismatch repair?
A. To excise the mismatched base pair. B. To find mismatches. C. To directly bind the DNA polymerase. D. To make a cut in the nonmethylated DNA strand. E. To digest the nonmethylated DNA strand.
Tom is choking on a piece of steak that is stuck in his trachea, and he signals for his young son to call 911. It takes the paramedics four minutes to reach his house. Will this be in time to save Tom (and why), or will Tom already be dead (and why)?
A. Tom will be alive since the myoglobin in his muscles will release oxygen into the blood after he stops breathing. B. Tom will be dead due to the lowered pH of his blood. C. Tom will be dead since all the hemoglobin in his arterial blood will unload its oxygen during the first pass through the tissues after his last breath. D. Tom will be alive since he had a reserve of about three-quarters of his hemoglobin still bound to oxygen when he started choking. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about oxygen transport? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?