UNIT 2 The Chemistry of Cells

Question 1

Atom

Answer 1

The smallest unit of a substance that maintains the properties of that substance

Question 2

Element

Answer 2

A substance that is made entirely of one type of atom.

Question 3

Cell Theory

Answer 3

Describes the basic characteristics of all cells and organisms.

Question 4

Prokaryotic Cells

Answer 4

Have a cell membrane but do not have organelles that are enclosed in a membrane.

Question 5

Eukaryotic Cells

Answer 5

Larger than Prokaryotic Cells. They have a nucleus that holds the genetic material and organelles. They are unicellular.

Question 6

Cell Membrane

Answer 6

Surrounds the cell, a protective, flexible barrier that controls what enters and leaves the cell.

Question 7

Cytoplasm

Answer 7

Gel Like liquid inside the cell and this maintains the cell shape.

Question 8

Types of Organelles

Answer 8

1. Ribosomes: are organelles that make proteins.
2. Mitochondria are organelles that release energy from food molecules.
3. Plant cells have chloroplasts that produce sugar and give plants their green color.

Question 9

DNA

Answer 9

Genetic Material

Question 10

Cell Theory

Answer 10

Describes the basic characteristics of all cells and organisms.