Inside a leaf

Question 1

What are the advantages of the palisade cells being long and very closely packed in terms of photosynthesis ?

Answer 1

They are closely packed to absorb the maximum amount of sunlight

Question 2

Where are sugars travelling in the phloem produced?

Answer 2

Sugars are produced in the chloroplasts

Question 3

Why must plants be able to make such varied use of the sugar produced in photosynthesis?

Answer 3

Glucose is the only food that leaves can produce

Question 4

Label the leaf from top to bottom

Answer 4

Cuticle 
Epidermis 
Palisade cells / mesophyll 
Spongy mesophyll cells 
Large air spaces 
Stoma and Guard cells

Question 5

What are monomers and give an example

Answer 5

They act as building blocks for long chain molecules . E.g glucose

Question 6

What are polymers and give two examples

Answer 6

Long chain molecules. E.g cellulose and proteins

Question 7

Give the photosynthesis word equation and balanced chemical equation

Answer 7

Light
Carbon dioxide +water——>oxygen+glucose
Chlorophyll

6CO2 + 6H2O + light energy = C6H12O6 + 6O2.

Question 8

Which types of cell in a leaf contain chloroplasts ?

Answer 8

Palisade mesophyll

Question 9

Which parts of a leaf are able to photosynthesise?

Answer 9

Palisade mesophyll, spongy mesophyll and guard cells

Question 10

Why are leaves very thin, flat and light?

Answer 10

Leaves need to absorb light in order to photosynthesise, and therefore need a large surface area, and being thin provides a short distance for the CO2 to diffuse