Original questions for all eight sections: Section 1 style multiple choice, and Section 2 style questions with data checked and written answers read by Mia.
Question paper
2 hours 30 minutes, 100 marks
Section 1
20 marks of multiple choice
Section 2
80 marks of written answers
Exam day 2027
Wednesday 12 May, 09:00 to 11:30
Try 4 questions
Question 1Section 1 style
PCR products after gel electrophoresis. Person 1: 250 base pairs. Person 2: 250 and 220 base pairs. Person 3: 220 base pairs.
Person
Bands (base pairs)
Person 1
250
Person 2
250, 220
Person 3
220
A genetic disorder is caused by the deletion of 30 base pairs from one gene. A 250 base pair region of the normal gene, which includes the site of the deletion, was amplified by PCR from three people, and the products were separated by gel electrophoresis. Person 1: one band, at 250 base pairs. Person 2: two bands, at 250 and 220 base pairs. Person 3: one band, at 220 base pairs. Which statement is correct?
Question 2Section 1 style
As electrons are passed along the electron transport chain, energy is released. What is this energy used for?
Question 3Section 1 style
On a man's ECG, the time from the start of one heartbeat to the start of the next is 0.8 s. His cardiac output is 6.0 litres per minute. What is his stroke volume?
Question 4Section 1 style
A lymphocyte's membrane receptor binds to the antigen it is specific for. What happens next?