Chapter 1

Question 1

plasma membrane

Answer 1

A thin, hydrophobic barrier that regulates

the movement of molecules in and out of the cell.

Question 2

cytoplasm

Answer 2

The internal volume of the cell. Consists of cytsol
(the aqeous solution of the cytosol) and dissolved biomolecules
(metabolites, proteins, ribosomes, etc).

Question 3

nucleic acid

Answer 3

A nucleoid or nucleus that contains the genetic

material of the cell.

Question 4

the four levels of building blocks to cells

Answer 4

1: monomeric units
2: macromolecules
3: supramolecular complexes
4: the cell and its organelles

Question 5

two experimental approaches

Answer 5

1. in vitro - studies the behaviour of molecules outside the context of the cell or organism
2. in vivo - studies occur within the context and complexity of the cell or organism

Question 6

experiments which are successful in vitro often

Answer 6

fail in vivo because of teh greater complexity of the system