Genetic material that controls the activities of the cell.
10 of 29
Animal cell - Mitochondria are...?
Where most of the reactions for aerobic respiration take place.
11 of 29
Resperation transfers what?
Energy that the cell needs to work.
12 of 29
Animal cell - Cytoplasm is a...?
Gel-like substance where most of the chemical reactions happen. It contains enzymes that control these chemical reactions.
13 of 29
Animal cell -The cell membrane holds what...?
The cell together and controls what goes in and out.
14 of 29
Animal cell - Ribosomes are...?
Where proteins are made in the cell.
15 of 29
Plant cell - Rigid cell wall is made of what?
Cellulose - It supports the cell and strengthens it.
16 of 29
Plant cell - Chloroplasts are...?
Where photosynthesis occurs, which makes food for the plant. They contain a green substance called chlorophyll, which absorbs the light needed for photosynthesis.
17 of 29
Plant cell - The Permanent vacuole contains what?
Cell sap - a weak solution of sugar and salts.
18 of 29
Bacteria are...?
Prokaryotes
19 of 29
Bacterial cells don't have a 'true' what?
Nucleus - instead they have a single circular strand of DNA that floats freely in the cytoplasm.
20 of 29
Bacterial cells may also contain one or more of what?
Small rings of DNA called plasmids.
21 of 29
Bacteria don't have what?
Chloroplasts or mitochondria.
22 of 29
Cells are studied using a what?
Microscope
23 of 29
Light microscopes use...?
Light and lenses to form an image of a specimen and magnify it. They let us see individual cells and large subcellular structures, like nuclei.
24 of 29
Electron microscopes use what?
Electrons instead of light to form an image. They have a much higher magnification than light microscopes.
25 of 29
Electron microscopes have a higher what?
Magnification and resolution.
Resolution is the ability to distinguish between 2 points, so a higher resolution gives a sharper image.
26 of 29
Electron microscopes let us see what?
Smaller things in more detail, like the internal structure of mitochondria and chloroplasts. They even let us see tinier things like ribosomes and plasmids.
27 of 29
How do you calculate magnification?
magnification= image size/real size
28 of 29
Microscope Practical (preparing your slide) - What are the steps?
1. Add a drop of water to the middle of a clean slide.
2. Cut up an onion and separate it out into layers. Use tweezers to peel off some epidermal tissue from the bottom of one of the layers.
1. Add a drop of water to the middle of a clean slide.
2. Cu
Comments
No comments have yet been made