Which of the following does not contain the base uracil?
tRNA
rRNA
mRNA
DNA

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water

As molecules are formed from metabolism, entropy __ and the universe becomes less disordered. a. is decreased b. is increased c. moves closer to equilibrium d. is unchanged