Transcript Intermediate 2 Biology - Macleodbiology's Blog

Intermediate 2 Biology
Unit 1 Revision
Chapter 1 Structure and Function of Cells
1.
What structures are common to both plant and animal cells?
2.
Name the structures common to all plant cells.
3.
What is yeast?
4.
Give 3 commercial uses of yeast.
Answers
1.
Cytoplasm, nucleus, cell membrane
2.
Cell wall, vacuole, (chloroplasts)
3.
Unicellular (single celled) fungus
4.
Beer making, bread making, wine making
Chapter 2 Diffusion and Osmosis
1.
What is diffusion?
2.
Name two substances that diffuse into a cell.
3.
Name a substance that diffuses out of a cell.
4.
Describe a plant cell that is plasmolysed.
5.
What does turgid mean?
Answers
1.
Movement of a substance from an area of high concentration
to an area of low concentration
2.
Oxygen, glucose
3.
Carbon dioxide
4.
The vacuole has shrunk and the cytoplasm and cell
membrane have come away from the cell wall
5.
A plant cell that has taken in a lot of water by osmosis and is
swollen
Chapter 3 Enzyme Action
1.
What is the optimum temperature for all human enzymes?
2.
What happens to enzymes at temperatures above 40oC?
3.
What other factor affects the activity of enzymes?
4.
Amylase is an enzyme name its substrate and product.
5.
Do enzymes get used up during their reactions?
Answers
1.
37oC
2.
Denatured and activity slows down and eventually stops
3.
pH
4.
Substrate = starch Product = maltose
5.
No
Chapter 4 Respiration
1.
Write the word equation for respiration.
2.
What energy conversion takes place during respiration?
3.
What is the name of the first stage of respiration?
4.
Write the equation showing the formation of energy.
5.
Name the substance produced in anaerobic respiration in:
a) a plant cell
b) an animal muscle cell
Answers
1.
Glucose + Oxygen  Carbon dioxide + water
2.
Chemical energy in glucose  chemical in ATP
3.
Glycolysis
4.
ADP + Pi  ATP
5.
a) alcohol
b) lactic acid
Chapter 5 Photosynthesis
1.
What are the raw materials for photosynthesis?
2.
What other factors must be present for photosynthesis?
3.
Name the product of photosynthesis and state:
a) the storage molecule it is converted into
b) the structural molecule it is converted into
4.
What effect does the concentration of carbon dioxide have on
the rate of photosynthesis?
5.
What effect does light intensity have on photosynthesis?
Answers
1. Carbon dioxide and water
2. Light and green pigment chlorophyll
3. Product = glucose
a) starch stored in starch grain
b) cellulose for cell walls
4. Rate of photosynthesis increases then levels off because
another limiting factor is affecting the rate
5. As above