7 1 Prokaryotic Eukaryotic Cells State Standard SB

7. 1 – Prokaryotic & Eukaryotic Cells State Standard SB 1 a Explain the role of cell organelles for both prokaryotic & eukaryotic cells, including the cell membrane, in maintaining homeostasis & cell reproduction. SB 3 d Compare & contrast viruses with living organisms.

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.

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

Chapter 7 Cellular Structure and Function 7. 1 Prokaryotic & Eukaryotic Cells § Origin of the name § eu- = true § karyon = nucleus § Contain a true nucleus § Memorization Tip: “Euk-Nuc” because nucleus is present.

Chapter 7 Cellular Structure and Function 7. 1 Prokaryotic & Eukaryotic Cells Eukaryotic Cell § Larger compared to other cells § Complex structure § Contains membranebound organelles § Includes all plant, animal, fungus, & protist cells § Unicellular or multicellular

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

Chapter 7 Cellular Structure and Function 7. 1 Formative Questions True or False All cells, whether eukaryotic or prokaryotic, have a plasma membrane.

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? A. nucleus B. organelles C. genetic material (DNA) D. larger cell size