ATP contains:
a. adenine
b. cytosine
c. uracil
d. thymine
e. guanine
a
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Valves, which are found ________, maintain the unidirectional movement of blood, thereby facilitating the return of blood to the heart.
A) only in central veins B) in all venules C) only in peripheral veins D) only in arteries E) in all veins
In order to express eukaryotic genes in a bacterium, the ________ must first be removed.
A. introns B. 3' poly A sequence C. exons D. enhancers
Suppose that your diet does NOT contain any dark green vegetables, whole grains, yeast, or lean meats. Which vitamin might you be deficient in?
a. B1 b. folic acid c. B6 d. niacin
Linnaeus began naming organisms that were alike using Latin names. He gave each organism two names; for example, the pigmy rattlesnake is called Sistrurus miliarius by scientists. What type of naming system is this and what group does "miliarius" designate?
A. Polynomial nomenclature; genus. B. Binomial nomenclature; genus. C. Binomial nomenclature; species. D. Polynomial nomenclature; species.