Plants contain starch and cellulose.
Which part of a plant cell stores starch?
(1)
☐ | A | amyloplast | |
☐ | B | middle lamella | |
☐ | C | plasmodesmata | |
☐ | D | tonoplast |
How many of the following statements about starch are correct?
1. it has a compact shape
2. it contains 1,6 glycosidic bonds only
3. it is a polymer of β-glucose
4. it is a polypeptide
(1)
☐ | A | one | |
☐ | B | two | |
☐ | C | three | |
☐ | D | four |
How many of the following contain cellulose?
1. phloem
2. sclerenchyma
3. vacuole
4. xylem
(1)
☐ | A | one | |
☐ | B | two | |
☐ | C | three | |
☐ | D | four |
Microfibrils are composed of cellulose.
The image shows the arrangement of microfibrils in a plant cell wall, as seen using an electron microscope.
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Explain how the structures of cellulose and microfibrils increase the strength of a plant cell wall.
Use the information in the image to support your answer.
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