Cells And Microscopy

Question 0

What 4 features do plant and animal cells share

Answer 0

Nucleus- control centre of the Cell contains the DNA
Cell membrane- holds cell together and controls what enters and leaves cell
Cytoplasm- gel like substance where chemical reactions occur
Mitochondria- where reaction for respiration happens (energy released)

Question 1

What are all living things made up of?

Answer 1

Cells

Question 2

What 3 extra features do plant cells have?

Answer 2

Vacuole- contains weak solution of cell Sap
Chloroplasts- where photosynthesis occurs, contains chlorophyll
Cell wall- this contains cellulose to make cell wall rigid

Question 3

Describe a bacterial cell

Answer 3

It has no nucleus but chromosomal DNA where all information is stored and activities carried out. It has a flagellum which propels the cell forward to move, it has a cell wall to support the cell and plasmids which are extra DNA.

Question 4

What do plasmids contain

Answer 4

Extra DNA for things like drug resistance which can be passed between cells

Question 5

Where is bacterias chromosomal DNA found

Answer 5

In the cytoplasm as they have no nucleus

Question 6

When where light microscopes invented

Answer 6

1590’s

Question 7

When where electron microscopes invented

Answer 7

1930’s

Question 8

Describe the difference between the 2 microscopes

Answer 8

Light microscopes don’t allow us to see much detail just things like mitochondria and nuclei where as electron microscopes allow us to see more detail like the plasmids and inside of the mitochondria

Question 9

How do you calculate magnification

Answer 9

Length of image ➗ length if specimen