AQA A Level · Biology 7402

Inorganic ions: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Inorganic ions.

10 questions22 marksFree, no account

Question 1

1 mark

Which of the following describes the role of hydrogen ions in biological systems as specified in the AQA syllabus?

Question 2

1 mark

Inorganic ions play specific roles depending on their properties. Which of the following correctly describes the role of the stated ion?

Question 3

1 mark

Which of the following statements best explains why sodium ions are necessary for the absorption of glucose from the lumen of the small intestine into the epithelial cells?

Question 4

1 mark

Which inorganic ion is an essential component of haemoglobin and plays a direct role in the transport of oxygen?

Question 5

1 mark

Phosphate ions \( (PO_4^{3-}) \) play a structural role in the formation of various biological polymers. Which of the following describes a specific location where phosphate ions are found and the bond they help form?

Question 6

2 marks

State the specific role of iron ions \( (Fe^{2+}) \) in the structure and function of haemoglobin.

Write your answer out first, then check it against the worked solution.

Question 7

3 marks

Identify the inorganic ion that is a component of haemoglobin and explain its specific role in the transport of oxygen within the blood.

Write your answer out first, then check it against the worked solution.

Question 8

5 marks

In the mammalian ileum, the absorption of glucose occurs via co-transport. Describe the specific role of ATP hydrolase in maintaining the concentration gradient of sodium ions \( (Na^+) \) required for this process to continue.

Write your answer out first, then check it against the worked solution.

Question 9

3 marks

Inorganic ions are essential for various biological processes in mammals.

a) Explain the specific role of iron ions in the transport of oxygen. (1 point)
b) Describe how hydrogen ions relate to the concept of pH and why maintaining a stable pH is vital for enzyme-controlled reactions. (2 points)

Write your answer out first, then check it against the worked solution.

Question 10

4 marks

Inorganic ions play specific roles in various biological processes.

a) Explain the role of iron ions in the transport of oxygen around the body. (2 points)
b) Describe the role of sodium ions in the co-transport of glucose across the ileum wall. (2 points)

Write your answer out first, then check it against the worked solution.

* The content provided by thinka is generated by AI and may not always be accurate or up-to-date. Please use it as a supplementary resource and verify with official materials.

You've seen the model answer. Now get yours marked.

This page can show you how a good answer looks. It cannot tell you what your answer was missing. thinka marks your written work against the real mark scheme in about 15 seconds.

Get My Answers Marked Back to the notes

Want more questions like these? Get a fresh set on this topic, marked as you go.