1.1 - Cellular Structure And Function

Question 1

Unicellular

Answer 1

An organism composed of a single cell

Question 2

Multicellular

Answer 2

Are organisms that are composed of many cells

Question 3

Cell Theory

Answer 3

• cells are the smallest structural and functional unit of life
• all organisms are composed of one or more cells
• all cells come from pre-existing cells

Question 4

Prokaryotic Cells (Type Of Cells)

Answer 4

Lack a distinct nucleus and membrane bound organelles
( - Unicellular
- Evolutionarily ancient (3.8 billion years ago)
- E.g - bacteria and archaea)

Question 5

Eukaryotic Cells (Types Of Cells)

Answer 5

Have a distinct nucleus and membrane bound organelles
( - Usually multi-cellular
- More complex, evolved from prokaryotes
- They can be found in plants, animals and fungi)

Question 6

Prokaryotic Vs Eukaryotic

Answer 6

Pro-
- Simple, unicellular, small
- No membrane bound organelles
- Small amounts of DNA, circular, free floating
- No nucleus, mitochondria
- Binary Fission
- E.g - Bacteria and archea

Eu-
- Complex, usually multicellular, large
- Membrane bound organelles
- Large amounts of DNA, linear, stored in nucleus
- Presence of nucleus and mitochondria
- Mitosis
- E.g - Plants, animals and fungi

Question 7

Cell Structure

Answer 7

• Golgi Body (MB)
• Lysosome (MB)
• Centrioles (Animal)
• Chloroplast (Plant) (MB)
• (Large) Vacuole (Plant) (MB)
• Cell Wall (Plant)
• Plasma Membrane
• Cytosol
• Ribosomes
• Nucleus (MB)
• Mitochondria (MB)
• Rough Endoplasmic Reticulum (MB)