You are trying to figure out what molecule, dna, rna, or protein, is responsible for making your bacterial cell lysate turn blue when you add a certain chemical. you divide your lysate into 4 tubes and add (a) nothing, (b) protease, (c) rnase, and (d) dnase. then you add your chemical of interest to each tube. tubes (a), (b), and (d) turned blue but (c) remained colorless. you conclude:
a. the molecule responsible for making the blue color is dna.
b. your rnase didn't work.
c. the molecule responsible for making the blue color is rna.
d. the molecule responsible for making the blue color is a protein.

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins

Cold case files recently began re-investigating an old murder case. the murder took place in the park; a young man, james, was hit over the head with a brick and killed. police suspected the jealous former boyfriend of james' wife, karen. whoever killed james may have washed their hands in a near-by bird bath as detectives found blood in the bird bath. since the murder took place before dna fingerprinting was available, the suspected killer, ronnie, went free. detectives are now reviewing the blood evidence using dna fingerprinting. based on the dna fingerprints of all possible suspects, who is james' killer?