Melanoma is a cancer that is frequently associated with a mutation in what gene?
A) in the IT15 gene B) in the Huntington gene
C) in the DNA polymerase gene D) in the BRAF gene
Answer: D
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Because hardly any oxygen (O2) was in the early Earth's atmosphere, the single-celled microorganisms probably used which of the following to produce energy to drive metabolic processes?
A. Aerobic cellular respiration. B. Anaerobic cellular respiration. C. Sulfuric acid respiration. D. Both aerobic and anaerobic cellular respiration. E. Sulfuric acid, aerobic and anaerobic respiration.
Answer the following statements true (T) or false (F)
1. The Genetic Testing Registry of the U.S. National Institutes of Health acts as a clearinghouse to provide information on genetic tests. 2. Unlike cholesterol checks and chest x-rays, the results of genetic tests may have repercussions to family members who share genotypes that can affect health. 3. In substrate reduction therapy, a drug taken by mouth decreases the amounts of the molecule on which a deficient enzyme acts. 4. Repurposing a drug is much more economical than developing a new one. 5. Leber congenital amaurosis type 2 has been successfully treated using gene therapy.
All tissues are composed of cells.
Answer the following statement true (T) or false (F)
Purines and pyrimidines are precursors for synthesis of ________.
A. nucleic acids B. fatty acids C. proteins D. peptidoglycan