7.1 – Prokaryotic & Eukaryotic Cells

State StandardSB1a

Explain the role of cell organelles for both prokaryotic & eukaryotic cells, including the cell membrane, in maintaining homeostasis & cell reproduction.

SB3dCompare & contrast viruses with living

organisms.

Prokaryotic Cells

Origin of the name: pro- = before Karyon = nucleus

Cellular Structure and Function

7.1 Prokaryotic & Eukaryotic Cells

Chapter 7

• Thought to be the first cells on earth, before any cells with a nucleus.

• Prokaryotes lack a nucleus.

• Memorization Tip: “Pro-No” because there is no nucleus.

Prokaryotic Cells Cont’d

Smaller compared to other cells

Simple structure

Cellular Structure and Function

Contain no membrane-bound organelles

All types of bacteria are prokaryotic

All are unicellular

7.1 Prokaryotic & Eukaryotic Cells

Chapter 7

A Typical Prokaryote

Eukaryotic Cells

Origin of the name eu- = true karyon = nucleus

Cellular Structure and Function

Contain a true nucleus

Memorization Tip:“Euk-Nuc” because nucleus is present.

7.1 Prokaryotic & Eukaryotic Cells

Chapter 7

Eukaryotic Cell Larger compared to

other cells

Cellular Structure and Function

Complex structure Contains membrane-

bound organelles

Includes all plant, animal, fungus, & protist cells

Unicellular or multicellular

7.1 Prokaryotic & Eukaryotic Cells

Chapter 7

Membrane-Bound Organelles

Surrounded by a single or double barrier

Cellular Structure and Function

Includes: Nucleus Mitochondria Chloroplasts Endoplasmic Reticulum Golgi Apparatus Lysosomes

7.1 Prokaryotic & Eukaryotic Cells

Chapter 7

Example of aMembrane-Bound Organelle

Are Viruses Living?(What do you think?)

• Are they cells?

• Do they use energy to grow?

• Do they use energy to respond to their surroundings?

• Do they maintain homeostasis?

Who’s Hosting?

• The only way viruses can survive is through a host cell.

• Viruses need a host to multiply

• Host-an organism that provides energy

• Examples: people, birds, raccoon, tomatoes, potatoes

True or False

All cells, whether eukaryotic or prokaryotic, have a plasma membrane.

Cellular Structure and FunctionChapter 7

7.1 Formative Questions

A. nucleus

B. organelles

C. genetic material (DNA)

D. larger cell size

What feature of eukaryotic cells has enabled them to develop more specific functions than prokaryotic cells?

Cellular Structure and FunctionChapter 7

7.1 Formative Questions