Lecture 2: Introduction to Cell Biology Flashcards
1
Q
What are the four components of cell theory?
A
- Cells are the fundamental unit of life
- All living organisms are composed of cells
- All cells come from preexisting cells
- Evolution through natural selection explains diversity of modern cells
2
Q
What is the most commonly used microscope in biology?
A
The light microscope.
3
Q
What type of microscopes substitutes light for a beam of electrons?
A
An electron microscope.
4
Q
Which membrane separates the organelles from the cytoplasm and is composed of lipids and phospholipids?
A
The plasma membrane.
5
Q
What are the two categories of cells?
A
- Eukaryotes
- Prokaryotes
6
Q
Which category of cell meets this description:
- 1-10mm
- more simple
- DNA in nucleoid region
- No organelles
A
Prokaryotic cells.
7
Q
Which category of cell meets this description:
- 10-100mm
- more complex
- DNA in nucleus
- Many organelles
A
Eukaryotic cells.
8
Q
What does symbiosis mean?
A
The living together or coexistence of two organisms that profit from each other.
9
Q
A
