What holds the two strands of a dna molecule to each other?
hydrogen bonds
double carbon bonds
peptide bonds
single carbon bonds

Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.