The four main types of macromolecules are organic. what does organic mean in this context. A. it is made only of carbon
B. it is produced without the use of pesticides.
C. it is a very large molecule.
D. it is made from or produced by a living organism.

True or false: (a) the strings of little red dots represent carbohydrates. (b) the model is called a bilayer because there are two main types of molecules present, lipids and proteins. (c) the many black lines represent amino acid tails. (d) this model shows membrane transport. (e) the blue ovals are hydrophobic. (f) the blue ovals represent phospholipid heads.