Which of the following accurately describes the structure of dna?
a. dna is made up of nucleotides, containing a 3-carbon sugar, a phosphate group, and base.
b. a always pairs with c, and g always pairs with t.
c. dna consists of four bases: a, g, c, and u.
d. dna is in the form of antiparallel strands twisted as a double helix.

Why is it important that human chromosomes have many origins of replication

The study of interaction between living organisms and their enviroment is called (a) phytogeography (b) ecology (c) phytosociology (d) ecosystem

Which of the following is a difference between active transport and facilitated diffusion? view available hint(s)which of the following is a difference between active transport and facilitated diffusion? facilitated diffusion can move solutes against a concentration gradient, and active transport cannot.active transport involves transport proteins, and facilitated diffusion does not.facilitated diffusion involves transport proteins, and active transport does not.active transport requires the expenditure of cellular energy, and facilitated diffusion does not.