PHYSIOLOGY 261 Lecture Quiz1 Part 1 - Physiology.

DNA nucleotide specifically consists of a. A five-carbon sugar and a phosphate group b. A five-carbon sugar and an amino acid c. A ribose sugar, a nitrogenous base, and a phosphate group. d. A deoxyribose sugar, a nitrogenous base, and a phosphate group. e. A five-carbon sugar and a nitrogen base. 2. A base is a protein a. Converter b. Donor c. Creator d. Acceptor e. Both acceptor/creator 3. A class of lipids used as chemical messengers, to signal cells to undergo changes, is called Steriods 4. A collection of cells that work together designates a(n) tissue 5. A component of an important buffer in the human body is: HCO3- 6. A solution containing more hydrogen ions than hydroxide ion is: acidic 7. According to the rules of complentary base pariing, a nucleotide containing the base cytosine would only pair with a nucleotide containg the base: guanine 8. Adjacent amino acids in a polypeptide chain are held together by: peptide bonds 9. An initial stimulus produces a response that reinforces the stimulus in positive feedback. 10. Chemical reactions that occur in the human body are catalyzed by special protein molecules called enzymes. 11. Contractile protein fibers of the heart are considered to belong to which level of organization? Chemical