AQA AS Level Biology Paper
1 Exam Questions and Answers
100% PASS
Name the blood vessels that carry blood to the heart muscle. [1 mark]—
ANSWER-coronary arteries
What is a monomer? (1 mark)—ANSWER-the smaller/ repeating unit from
which larger molecules/polymers are made
Following digestion and absorption of food, the undigested remains are
processed to form faces in the parts of the intestine below the ileum.
The faeces of people with constipation are dry and hard. constipation can be
treated by drinking lactulose. Lactulose is soluble, but not digested or
absorbed in the human intestine.
Use your knowledge of water potential to suggest why lactulose can be used
to help people suffering from constipation. (2 marks)—ANSWER-(lactulose)
lowers water potential in the faeces
, water enters due to osmosis and softens the faeces
Give two features of DNA and explain how each one is important in the
semi-conservative replication of DNA. (2 marks)—ANSWER-Weak / easily
broken hydrogen bonds between bases allow two strands to separate /
unzip;
Two strands, so both can act as templates;
Complementary base pairing allows accurate replication;
What is meant by a hierarchy? [2 marks]—ANSWER-smaller groups within
larger groups and no overlap
Use Figure 6
D. erecta and D. willistoni are closely related species but different species.
Describe evidence from Figure 6 that supports this statement.—ANSWER-
both sine song is very similar
but pulse song have different peaks
When two females were together, their songs did not lead to any attempt to
mate. Use information from Figure 6 to suggest why the two females did not
attempt to mate.
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law, Copyrighted By Katelyn Whitman
1 Exam Questions and Answers
100% PASS
Name the blood vessels that carry blood to the heart muscle. [1 mark]—
ANSWER-coronary arteries
What is a monomer? (1 mark)—ANSWER-the smaller/ repeating unit from
which larger molecules/polymers are made
Following digestion and absorption of food, the undigested remains are
processed to form faces in the parts of the intestine below the ileum.
The faeces of people with constipation are dry and hard. constipation can be
treated by drinking lactulose. Lactulose is soluble, but not digested or
absorbed in the human intestine.
Use your knowledge of water potential to suggest why lactulose can be used
to help people suffering from constipation. (2 marks)—ANSWER-(lactulose)
lowers water potential in the faeces
, water enters due to osmosis and softens the faeces
Give two features of DNA and explain how each one is important in the
semi-conservative replication of DNA. (2 marks)—ANSWER-Weak / easily
broken hydrogen bonds between bases allow two strands to separate /
unzip;
Two strands, so both can act as templates;
Complementary base pairing allows accurate replication;
What is meant by a hierarchy? [2 marks]—ANSWER-smaller groups within
larger groups and no overlap
Use Figure 6
D. erecta and D. willistoni are closely related species but different species.
Describe evidence from Figure 6 that supports this statement.—ANSWER-
both sine song is very similar
but pulse song have different peaks
When two females were together, their songs did not lead to any attempt to
mate. Use information from Figure 6 to suggest why the two females did not
attempt to mate.
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law, Copyrighted By Katelyn Whitman
