Inorganic ions：练习题

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

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

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?

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

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?

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

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

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.

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)

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)