Exploring Cells

Question 1

State the three tenets of cell theory.

Answer 1

1. All organisms are composed of cells.
2. The cell is the basic unit of structure and organisation in organisms.
3. All cells come from pre-existing cells.

Question 2

Explain how you would differentiate between a prokaryotic cell and a eukaryotic cell if you were looking down a microscope at a prepared slide.

Answer 2

To differentiate between a prokaryotic and a eukaryotic cell under a microscope, Prokaryotic cells are smaller, have no nucleus, and their DNA is spread out in the cell (in a nucleoid). Eukaryotic cells are larger, have a defined nucleus that holds their DNA, and have other organelles like mitochondria. So basically if you see a nucleus, it’s a eukaryote; if not, it’s a prokaryote

Question 3

Where is DNA found in a eukaryotic cell?

Answer 3

In the nucleus

Question 4

Where is DNA found in a prokaryotic cell?

Answer 4

Free floating in the cell

Question 5

1 millimetre (m)=

Answer 5

1000 micrometres

Question 6

1 micrometre (μm)=

Answer 6

1000 nanometres (nm)