Chitinase is an enzyme that breaks down the chitin molecules in the insect exoskeleton. the sequence of amino acids in the chitinase is an example of which level of protein structure? a. quaternary b. tertiary c. secondary d. primary

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.