It critical that all of the cell's DNA is copied during the synthesis phase, prior to cell division because the cell is going to divide into two new cells, so the DNA must first be copied so each daughter cell receives a full set of genetic information. 1. True
2. False

Which class of organic compounds makes up the channels and pumps that move materials from one side of the cell membrane to the other? a.) carbohydrates b.) lipids c.) proteins d.) nucleic acids

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.