9: Gas exchange in plants

Question 1

List the minerals that are essential for the growth of plants

Answer 1

• Magnesium
• Nitrogen
• Phosphorus
• Potassium

Question 2

Magnesium

Answer 2

• absorbed in the form of Mg2+ ions
• Required for the synthesis of chlorophyll
• Deficiency: poor growth, yellow leaves

Question 3

Nitrogen

Answer 3

• Absorbed in the form of nitrate ions and ammonium ions
• Required for the synthesis of chlorophyll, amino acids, proteins, nucleic acids
• Deficiency: poor growth, yellow leaves

Question 4

Phosphorus

Answer 4

• absorbed in the form of phosphate ions (PO4 3-)
• syntheis of cell membranes, nucleic acids and ATP
• required in some enzymatic reactions
• Deficiency: poor growth, purple leaves, poor development of roots

Question 5

Potassium

Answer 5

• Absorbed in the form of potassium ions
• Promotes photosynthesis and transport in plants; required in some enzymatic reactions
• Deficiency: blackedned leave edges