Compare & contrast viruses with living organisms. 7.1 – Prokaryotic & Eukaryotic Cells State Standard SB1a Explain the role of cell organelles for both prokaryotic & eukaryotic cells, including the cell membrane, in maintaining homeostasis & cell reproduction. SB3d Compare & contrast viruses with living organisms.

Origin of the name: pro- = before Karyon = nucleus Prokaryotic Cells Chapter 7 Cellular Structure and Function 7.1 Prokaryotic & Eukaryotic Cells Prokaryotic Cells Origin of the name: pro- = before Karyon = nucleus 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.

Smaller compared to other cells Simple structure Chapter 7 Cellular Structure and Function 7.1 Prokaryotic & Eukaryotic Cells Prokaryotic Cells Cont’d Smaller compared to other cells Simple structure Contain no membrane-bound organelles All types of bacteria are prokaryotic All are unicellular A Typical Prokaryote

“Euk-Nuc” because nucleus is present. Chapter 7 Cellular Structure and Function 7.1 Prokaryotic & Eukaryotic Cells Eukaryotic Cells Origin of the name eu- = true karyon = nucleus Contain a true nucleus Memorization Tip: “Euk-Nuc” because nucleus is present.

Larger compared to other cells Chapter 7 Cellular Structure and Function 7.1 Prokaryotic & Eukaryotic Cells Eukaryotic Cell Larger compared to other cells Complex structure Contains membrane-bound organelles Includes all plant, animal, fungus, & protist cells Unicellular or multicellular

Membrane-Bound Organelle Chapter 7 Cellular Structure and Function 7.1 Prokaryotic & Eukaryotic Cells Membrane-Bound Organelles Surrounded by a single or double barrier Includes: Nucleus Mitochondria Chloroplasts Endoplasmic Reticulum Golgi Apparatus Lysosomes Example of a Membrane-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

All cells, whether eukaryotic or prokaryotic, have a plasma membrane. Chapter 7 Cellular Structure and Function 7.1 Formative Questions True or False All cells, whether eukaryotic or prokaryotic, have a plasma membrane.

What feature of eukaryotic cells has enabled Chapter 7 Cellular Structure and Function 7.1 Formative Questions What feature of eukaryotic cells has enabled them to develop more specific functions than prokaryotic cells? nucleus organelles genetic material (DNA) larger cell size