Therapy involving Toll-Like Receptors may be useful in treating some autoimmune disorders and cancers.
a. true
b. false
Ans: a. true
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In the 1950s, Earl Sutherland and colleagues discovered that epinephrine ____
a. leads to release of a second messenger that ultimately results in hydrolysis of glycogen to glucose b. leads to release of a second messenger that lowers blood glucose by causing it to bind to liver cells c. interacts directly with the enzyme glycogen phosphorylase d. interacts directly with the cell membrane to help transport glucose into the cell e. is a signaling molecule that does not require a cell surface receptor
Slime molds are classified as:
a. protists b. fungi c. bacteria d. archaea e. algae
Which of the following statements is
CORRECT about C4 plants?
a. In C4 plants, fixation of carbon dioxide and the light-independent reactions occur in two different types of cells. b. C4 plants are so called because a 4-carbon molecule is the first stable intermediate that forms in the light-independent reactions. c. In C4 plants, carbon dioxide is fixed by an enzyme that does not use oxygen even at high oxygen levels. d. C4 plants are adapted to produce glucose even when stomata are closed. e. C4 plants do not use rubisco or the Calvin- Benson cycle.
A radula is characteristic of certain members of phylum Platyhelminthes
____________________ Indicate whether the statement is true or false.