Cells Ch. 2.1

http://koning.ecsu.ctstateu.edu/cell/cell.html

Focus Questions

1. What is cell theory?

2. What basic substances make up cells?

3. Why are macromolecules important to a cell?

1. What is cell theory?

Cell theory

All living things have cells

Cells are the smallest unit of

life

All cells come from preexisting

cells

Definition of Cell

A cell is the smallest unit that is capable of performing life

functions.

Which is NOT part of the cell theory?

A. B. C. D.

0% 0%0%0%

A. All cells come from preexisting cells

B. All cells contain a nucleus

C. All living things have cells

D. Cells are the smallest unit of life

45

Examples of Cells

Amoeba Proteus

Plant Stem

Red Blood Cell

Nerve Cell

Bacteria

Which is NOT a macromolecule?

A. B. C. D. E.

0% 0% 0%0%0%

A. Carbohydrates

B. Lipids

C. Nucleic Acids

D. Proteins

E. Water

45

Macromolecules

Water Nucleic Acids

Proteins Lipids Carbohydrates

Definition

Water makes up ___% of a cell’s volume

Long chains of nucleotides

Long chains of Amino acids

Large macromolecule that does not dissolve in water

Sugar molecules (1, 2, or long chain)

Examples

DNARNA

enzymeshair (horns,feathers)

fatsoils

sugarsstarchcellulose

Importance to the cell

• dissolves substances

• insulates

• carryhereditaryInformation

• used tomakeproteins

• regulatecellProcesses

• providestructuralsupport

• store largeamounts ofEnergy

• formProtective barrieraroundCells & cell parts

• supply energyfor cellprocesses• providestructuralsupport

2. What basic substances make up cells?

Which substance contains amino acid?

A. B. C. D. E.

0% 0% 0%0%0%

A. Carbohydrates

B. Lipids

C. Nucleic Acids

D. Proteins

E. Water

45

Which 2 macromolecules store energy?

A. B. C. D.

0% 0%0%0%

A. Carbohydrates & Proteins

B. Lipids & Proteins

C. Nucleic Acids & Lipids

D. Lipids & Carbohydrates

45

Which substance acts as a protective barrier?

A. B. C. D. E.

0% 0% 0%0%0%

A. Carbohydrates

B. Lipids

C. Nucleic Acids

D. Proteins

E. Water

45

Which substance is made up of sugars?

A. B. C. D. E.

0% 0% 0%0%0%

A. Carbohydrates

B. Lipids

C. Nucleic Acids

D. Proteins

E. Water

45

Which substance makes up 70% of the cells volume?

A. B. C. D. E.

0% 0% 0%0%0%

A. Carbohydrates

B. Lipids

C. Nucleic Acids

D. Proteins

E. Water

45