use of biological resources

Question 1

How can increaseing temperature increase crop yield

Answer 1

As temperature increases so does rate of photosynthesis

Increased kinetic energy of molecules / molecules move
faster / more collisions

Optimum temperature for enzymes

Question 2

Why may farmers use heaters that burn gas or oil to raise tempertaures to improve crop yield

Answer 2

They release co2, which is used in photosynthesis

co2 could be a limiting factor, so adding more will increase rate

Question 3

What chemicals are important for fertilizers and why

Answer 3

Nitrates - for amino acids / proteins
Magnesium - for chlorophyll for chloroplasts
Phosphate - for DNA.

Question 4

Why are too many fertilizers bad

Answer 4

Eutrophication
Algal bloom
Organic crops are more valuable
Artificial bad
Loss of aquatic life, due to washing into rivers
Increased soil concentration reduces water potential of soil
Prevents water uptake, therefore plant wilts

Question 5

How to genetically modify something

Answer 5

1. Use restriction enzymes to isolate desired gene
2. Insert gene into vector (virus or bacterial plasmid)
3. Insert virus into organism so the organism can take the vector and gene and start producing the protein

Question 6

What do ligase enzymes do

Answer 6

Join pieces of DNA together

Question 7

What does transgenic mean

Answer 7

The transfer of genetic material from one species to a different species