Chapter 5 Key Terms

Question 1

Organisms

Answer 1

Living individuals with 1+ cell

Question 2

Cells

Answer 2

Basic unit of life, use DNA to produce proteins

Question 3

Cell theory

Answer 3

Cells are fundamental unit of life, all organisms are cells, all cells come from preexisting cells, modern cells evolved from common ancestor.

Question 4

Implications of Cell Theory

Answer 4

Functions of all cells are similar, life is continuous, origin of life was origin of cells

Question 5

Lipids

Answer 5

Non-polar, hydrocarbons, insoluble in water, held together by van der waals holds them together, not polymers because not covalently bonded.

Question 6

Saturated Fatty acids

Answer 6

No double bonds, molecules pack tightly, solid at room temp. Ex: Butter

Question 7

Unsaturated Fatty acids

Answer 7

1 or more double bonds in carbon chain, kinks prevent close packing. Ex: oil

Question 8

Triglycerides

Answer 8

3 fatty acids + glycerol

Question 9

Ester linkage

Answer 9

Carbonyls bond with Hydroxls of glycerol

Question 10

Phospholipids

Answer 10

Fatty acid + glycerol but, phosphate group replaces one fatty acid

Question 11

Amphipathic

Answer 11

2 opposing properties in one molecule