Prokaryotic Cells

Question 1

What are prokaryotic cells?

Answer 1

Cells that are much smaller than eukaryotic cells that lack membrane bound organelles excluding ribosomes

Question 2

What are the key structural differences between prokaryotic cells and eukaryotic cells?

Answer 2

1. Prokaryotic cells are much smaller
2. Prokaryotic cells have no membrane bound - organelles
3. They have a cell wall made of murein
4. They have smaller ribosomes
5. There is no nucleus
6. Potentially can contian plasmids, capsule and flagella

Question 3

What are the additional structures that some prokaryotic cells have that other prokaryotic cells may not?

Answer 3

Plasmids, cassoulets and flagellum

Question 4

What non membrane bound organelles are found in prokaryotic cells compared to eukaryotic cells?

Answer 4

Prokaryotic cells: ribosomes

Eukaryotic cells: ribosomes, mitochondria, chloroplasts, endoplasmic reticulum, golgi apparatus and the nucleus

Question 5

What are ribosomes?

Answer 5

Ribosomes are small cytoplasmic granules found in all cells, made up of two sub units of protein and rRNA

Question 6

What are the two different types of ribosomes?

Answer 6

7OS (smaller ribosome) and 80S (large ribosome)

Question 7

What type of ribosome is found in prokaryotic cells compared to eukaryotic cells?

Answer 7

In prokaryotic cells, 70S ribosome is found. This type of ribosome is also found in mitochondria and chloroplasts

In eukaryotic cells, 80S ribosomes are found.

Question 8

What is the difference in the nucleus for eukaryotic cells and prokaryotic cells?

Answer 8

In prokaryotic cells, there is no nucleus, instead of a nucleus there is a single circular DNA molecule free in the cytoplasm which is not protein bound

Whereas in eukaryotic cells, a nucleus is present

Question 9

Are there cell walls in prokaryotic cells? If so describe what they are made up of?

Answer 9

There are cell walls in prokaryotic cells, which are made up of murein, a glycoprotein