All are true regarding red blood cells except ____?
a. Carry oxygen
b. no nucleus
c. No DNA
d. Type of connective tissue
e. all are correct
Answer: e. all are correct
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What would happen if the body did not produce glucagon?
A. Cells of the body would keep on releasing glucose into the blood stream, even when glucose levels were high in the blood stream. B. Cells of the body would not release glucose into the blood stream when glucose levels were low in the blood stream. C. Cells of the body would keep on taking glucose from the bloodstream and storing it. D. Cells of the body would neither take in glucose from the bloodstream nor release it into the blood stream.
Moving from the lumen outward, what is the correct order of layers that make up the lining of the digestive tract?
A. mucosa, submucosa, circular muscle layer, nerve net, longitudinal muscle layer, serosa B. serosa, nerve net, longitudinal muscle layer, circular muscle layer, submucosa, mucosa C. submucosa, mucosa, circular muscle layer, longitudinal muscle layer, nerve net, serosa D. serosa, submucosa, mucosa, longitudinal muscle layer, nerve net, circular muscle layer E. mucosa, circular muscle layer, serosa, nerve net, longitudinal muscle layer, submucosa
How many viroids are known to cause diseases in commercially valuable plants?
a. 12 b. 46 c. 68 d. 22 e. 30
A restriction enzyme cuts DNA and leaves the following end: CTGCA G Which of the following could be the sequence of the corresponding end of the other fragment generated by the enzyme?
A) G CTGCA B) C GTGCA C) CCGAT G D) GGCTA C E) None of these