Active transport — Paper 2 · IGCSE Biology (9-1) 0970

7 Which process depends on active transport? A absorption of carbon dioxide by plant leaves B reabsorption of glucose by kidney tubules C removal of carbon dioxide in the alveoli D uptake of water by plant roots

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2019

15 The graph shows the rate of uptake of magnesium ions by two similar plants, X and Y. The roots of each plant were placed in a range of solutions. Each solution contained a different concentration of magnesium ions. All other conditions were kept constant. plant X rate of uptake of ions plant Y concentration of magnesium ions in external solution What is a possible explanation for the difference in the results for the two plants? A Plant Y has fewer protein molecules for magnesium ion transport in its cell membranes. B Plant Y has a higher rate of respiration. C Plant Y has more root hair cells. D The root hair cells in plant Y have a lower water potential.

1 marks

Answer: A

This question in 0970/21 May/June 2020

8 Which process is involved in the uptake of glucose by the epithelial cells of kidney tubules? A active transport B osmosis C translocation D transpiration

1 marks

Answer: A

This question in 0970/21 May/June 2021

8 Which process is involved in the uptake of glucose by the epithelial cells of kidney tubules? A active transport B osmosis C translocation D transpiration

1 marks

Answer: A

This question in 0970/22 May/June 2021

7 The diagram shows the uptake of mineral ions by root hair cells. inside root hair cell X cell membrane energy mineral ion passing into the root hair cell from the soil Which type of molecule is labelled X in the diagram? A glucose B lipid C protein D starch

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2021

23 Which statement correctly explains the difference in glucose concentration in the kidney tubule between X and Y? glomerulus X Y kidney tubule A The glucose concentration is higher at X than at Y because glucose moves out of the kidney tubule by osmosis. B The glucose concentration is higher at X than at Y because glucose has been actively transported out of the kidney tubule. C The glucose concentration is higher at Y than at X because glucose diffuses into the kidney tubule. D The glucose concentration is higher at Y than at X because glucose is actively transported into the kidney tubule.

1 marks

Answer: B

This question in 0970/21 May/June 2022

5 Some examples of substances moving across membranes are listed. 1 glucose molecules into the epithelium that lines the small intestine 2 nitrate ions from a dilute solution in soil into a more concentrated solution in root hair cells 3 water molecules from mesophyll cells into the air spaces of a leaf For which examples must oxygen be present? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2022

6 The diagram shows the movement of glucose molecules across a cell membrane. low concentration glucose T cell membrane energy high concentration Which statement describes molecule T? A It is a fat molecule used to transport glucose down a concentration gradient. B It is a fat molecule used to transport glucose against a concentration gradient. C It is a protein molecule used to transport glucose down a concentration gradient. D It is a protein molecule used to transport glucose against a concentration gradient.

1 marks

Answer: D

This question in 0970/21 May/June 2023

6 Which row shows the changes that occur during the germination of a seed? respiration amount of how ions are rate energy required absorbed A decreased decreased active transport B decreased increased diffusion C increased decreased diffusion D increased increased active transport

1 marks

Answer: D

This question in 0970/22 May/June 2023

7 Which statements about active transport are correct? 1 It transports particles from a low concentration to a high concentration. 2 It always transports particles into cells. 3 It involves protein molecules in the cell membrane. 4 It uses energy from respiration. A 1, 2, 3 and 4 B 1, 3 and 4 only C 1 and 2 only D 3 and 4 only

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2023

6 Which process requires energy from respiration? A active transport B diffusion C osmosis D transpiration

1 marks

Answer: A

This question in 0970/21 May/June 2024

5 Which row shows a function of the cell membrane and a function of the cell wall in a palisade cell? cell membrane cell wall A active transport active transport B active transport support C support active transport D support support

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2024

4 A student made the following statements about the movement of ions by active transport. 1 It is the net movement of particles from a low concentration to a high concentration. 2 It is the net movement of particles from a high concentration to a low concentration. 3 It requires the use of energy from respiration. 4 It can only take place in living cells. Which statements are correct? A 1, 3 and 4 B 1 and 4 only C 2 and 4 D 2 only

1 marks

Answer: A

This question in 0970/21 May/June 2025