Exam Q Paper 2

Question 1

How will ADH being released affect blood pressure?

Answer 1

• ADH increases reabsorption of water
• ADH increases blood volume and pressure increases

Question 2

Name 4 techniques scientists can use to analyse viral DNA to determine that viruses are closely related:

Answer 2

• PCR
• Genetic fingerprinting
• Gel electrophoresis
• Genome sequencing

Question 3

Determining the genome of the viruses could allow scientists to develop a
vaccine.

Answer 3

• Could be used to identify proteome
• Which could be used to identify potential antigens to produce a vaccine

Question 4

Why do freshwater marshes have a high NPP:GPP ratio?

Answer 4

• Less respiration

Question 5

Name compounds which contain phosphates

Answer 5

ATP / ADP / phospholipids / DNA / RNA / RuBP / TP /GP etc.

Question 6

Which biological molecules contain nitrogen?

Answer 6

• proteins
• nucleic acid
• ATP

Question 7

Describe the role of saprobionts in nitrogen cycle:

Answer 7

• use enzymes to hydrolyse DNA/ protein
• to release ammonium into soil