Which of the following is not a method by which an oncogene can be turned on?
1.mutation
2.translocation
3.deletion of the proto-oncogene
4.viral invasion
5.activation of a tumor suppressor gene
3
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Which of the following statements is false concerning the outermost layer of the epidermis?
a. It is the first to experience any abrasion. b. Keratin provides waterproofing. c. Millions of cells are worn off daily. d. Its cells are undergoing rapid cell division. e. It is called the stratum corneum.
The kidneys can reabsorb nutrients and make _________ , a molecule that promotes calcium absorption in the digestive tract.
Fill in the blank(s) with the appropriate word(s).
The nitrogenous base that is only found in DNA and not in RNA is:
A. adenine. B. cytosine. C. uracil. D. guanine. E. thymine.
High levels of which hormone can suppress the body's immune system?
A) glucagon B) mineralocorticoids C) glucocorticoids D) antidiuretic hormone