2. Plant Response

Question 1

What type of molecule can hormones be?

Answer 1

Protein or lipid structures

Question 2

List the differences between proteins and lipids

Answer 2

Proteins:
- has peptide bonds
- has ionic, hydrogen and disulphide bridges
- made from amino acids

Lipids:
- has ester bonds
- made from 3x fatty acids
- 1x glycerol

Question 3

Define auxin

Answer 3

The chemical found at the end/growing part of plants
I.e. meristems, roots

Question 4

What is a plant Tropism

Answer 4

A plants growth response to an external stimulus

Question 5

Name three plant tropsisms

Answer 5

1. Phototropism
2. Gravitropism
3. Hydrotropism

Question 6

What do all tropisms rely on?

Answer 6

• a hormone that acts as a plant growth factor

Question 7

Name the hormone that is a type of auxin and acts as a Plant growth Factor

Answer 7

IAA

Question 8

What does IAA do?

Answer 8

Role of the IAA changes depending on locationb

Question 9

IAA ___________ growth on the shaded side of the stem

Answer 9

Stimulates

Question 10

Stem = ?

Answer 10

Stimulatiojb

Question 11

IAA ___________ growth in the lower side of the root

Answer 11

Inhibits