2.5.5 Active Transport

Question 1

Active transport notes

Answer 1

• Requires carrier proteins
• Requires ATP
• ATP makes carrier protein change shape
• Letting it transfer molecules or ions across cell membrane
• Used in reabsorption of useful molecules and ions into blood in the kidney
• Loading sugar in photosynthesising cells of leaves into phloem tissue
• Inorganic ions from soil into root hairs

Question 2

Active Transport Definition

Answer 2

Movement of molecules and ions through a cell membrane from a region of lower concentration to a region of higher concentration using energy from respiration