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.

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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.

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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.

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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)

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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)

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