Genetic Diversity and Adaptation

Question 1

Why is enzyme x faster than enzyme y

Answer 1

different sequence of amino acid so tertiary structure of enzyme x is more complimentary to substrate so more enzyme substrate complexes formed

Question 2

why does the frequency of gene x increase rapidly

Answer 2

• selective advantage
  -more likely to survive nd reproduce
  -pass down advantageous allele to offspring
  -over many gnenneratison there is an increase in allele frequency

Question 3

(a) A student used a dilution series to investigate the number of cells present
in a liquid culture of bacteria.
Describe how he made a 1 in 10 dilution and then used this to make a 1 in
1000 dilution of the original liquid culture of bacteria.

Answer 3

Add 1 part (bacteria) culture to 9 parts (sterile) liquid (to make 10–1 dilution);
2. Mix (well);
3.Repeat using 9 parts fresh (sterile) liquid and 1 part of 10–1 and 10–2
dilutions to make 10–3 dilution;