Cell Biology Concepts and Theories

The video covers Chapter 6 of Campbell Biology, focusing on key concepts for AP Biology. It begins with an overview of the chapter, emphasizing the importance of understanding cell theory, which includes the three fundamental ideas about cells. The video then compares light and electron microscopy, explaining their uses and limitations. It discusses the significance of the surface area to volume ratio in cells and the differences between prokaryotic and eukaryotic cells. Finally, it explains the endosymbiosis theory, highlighting the evolution of mitochondria and chloroplasts.

What is the primary focus of Chapter 6 in Campbell Biology?

• Important concepts beyond organelle functions

• Detailed functions of organelles

• History of cell discovery

• Photosynthesis and respiration

Which of the following is NOT a component of the cell theory?

• The cell is the most basic unit of life

• All living things are made of one or more cells

• Cells can arise spontaneously from non-living matter

• All cells come from pre-existing cells

Why are viruses not considered alive according to cell theory?

• They do not have a nucleus

• They cannot reproduce on their own

• They are not made of cells

• They do not have DNA

What is a key difference between light and electron microscopes?

• Light microscopes use light to magnify images

• Electron microscopes can observe live cells

• Electron microscopes are portable

• Light microscopes are more expensive

Why can't electron microscopes be used to observe live cell processes?

• They have lower resolution

• They are too expensive

• They require samples to be coated in metal

• They cannot magnify small components

Why do larger organisms have more cells instead of larger cells?

• Larger cells can store more nutrients

• Surface area to volume ratio limits cell size

• Larger cells are more efficient

• Smaller cells are harder to maintain

What happens to the surface area to volume ratio as a cell increases in size?

• It increases

• It decreases

• It becomes infinite

• It remains constant

What is a major difference between prokaryotic and eukaryotic cells?

• Prokaryotic cells have organelles

• Eukaryotic cells lack a nucleus

• Prokaryotic cells are more complex

• Eukaryotic cells have membrane-bound organelles

What does the endosymbiosis theory suggest about mitochondria and chloroplasts?

• They do not have their own DNA

• They evolved from eukaryotic cells

• They were once free-living prokaryotes

• They are not essential for cell function

Why do eukaryotic cells have organelles according to the video?

• To prevent cell division

• To improve metabolic efficiency

• To store genetic material

• To increase cell size