Which is a description of an estrogen receptor assay?
a. test for the presence of carcioembryonic antigen in the blood
b. tests for a portion of human chorionic gonadotropin in serum of patients
c. tests the presence of a protein antigen in serum of liver and testicular cancer patients
d. tests the concentration of hormone receptor sites in cells of breast cancer patients
d. tests the concentration of hormone receptor sites in cells of breast cancer patients
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Which of the following statements is false?
a. Neurons in the brain can interpret incoming action potentials only in certain ways. b. Optic nerve impulses can only be interpreted as light. c. Some sensory receptors do not convert a stimulus to nerve impulses. d. The stronger the stimulus, the more action potentials are generated. e. A strong stimulus activates many adjacent receptors, thereby increasing the number of action potentials and the level of awareness for the stimulus.
Which of the following is NOT found in the nucleus?
A. mitochondria B. nucleolus C. chromatin D. DNA
Integrins link extracellular matrix proteins either directly or indirectly to all of the following intracellular proteins except
a. actin. b. alpha-actinin. c. laminin. d. talin.
When a population has a gene with four alleles circulating, how many possible genotypes are there?
a) 3 b) 6 c) 10 d) 16