Which defines a codon? * a protein that begins transcription by breaking apart H bonds
three nucleotide bases on mRNA that specify one amino acid
O the strong bond between two complementary nitrogen bases
O a free-floating base that attaches to an open DNA strand

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca