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

16 Roots and leaves both act as a source and a sink for sucrose and amino acids at different times during the year. At which point in the year are the roots most active as a source? A spring new leaves start to grow D B winter summer no leaves leaves are are present mature C autumn leaves die and fall

1 marks

Answer: A

This question in 0970/22 Oct/Nov 2018

18 The diagram shows some potato tubers. New shoots are beginning to grow. Sucrose is being translocated from source to sink. tuber soil Which statement is correct? A The tuber is a sink. B The soil is a sink. C The shoots are sources. D The shoots are sinks.

1 marks

Answer: D

This question in 0970/22 May/June 2019

16 Which description of translocation is correct? A movement of glucose and amino acids from a sink to a source B movement of glucose and amino acids from a source to a sink C movement of sucrose and amino acids from a sink to a source D movement of sucrose and amino acids from a source to a sink

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2019

16 Dodder is a plant that grows on other plants called the hosts. The dodder plant connects to the host’s vascular bundles. The dodder plant does not have green leaves or roots. What correctly describes the regions for translocation? host leaves dodder A sink sink B sink source C source sink D source source

1 marks

Answer: C

This question in 0970/22 May/June 2020

16 What is a function of phloem? A transports minerals to the roots B transports starch to the roots C transports sugar to the roots D transports water to the roots

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2020

18 The diagram shows an onion plant that has been grown from a seed. Each onion plant takes two years to flower and produce more seeds. leaves 3 2 bulb 4 1 seed soil level year 1 year 2 developing flower 5 bulb 8 6 7 What is the onion bulb acting as in stage 3 and in stage 6? stage 3 stage 6 A sink sink B sink source C source sink D source source

1 marks

Answer: B

This question in 0970/21 May/June 2021

18 The diagram shows a plant at different times of year. stage 1 At the start of the growing season, the plant uses the food reserves stored in the bulb for the growth of shoots and leaves. stage 2 Later in the season, the leaves of the plant photosynthesise and the food reserves in the bulb are replaced. new growth of photosynthesising shoots and leaves leaves food reserves in the bulb bulb containing being replaced food reserves stage 1 stage 2 What is the role of the bulb during stage 1 and stage 2? stage 1 stage 2 A sink sink B sink source C source sink D source source

1 marks

Answer: C

This question in 0970/22 May/June 2021

17 Translocation is the movement of sucrose and amino acids in the phloem tissue of a plant from source to sink. Which organ can act as a source? A flower B growing shoot tip C new developing root D storage root

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2021

11 The statements describe some of the events that occur in a plant after light energy is absorbed by chlorophyll. 1 converted to chemical energy 2 converted to sucrose for translocation 3 starch is stored in the roots or seeds 4 glucose is produced In which order do these events occur? A 1  4  3  2 B 4  2  3  1 C 4  1  2  3 D 1  4  2  3

1 marks

Answer: D

This question in 0970/22 May/June 2022

16 Scientists investigate the movement of substances in a plant. They cut a ring of tissue from the stem. Removing the tissue removes some of the transport vessels found around the edge of the stem. A few days later they notice swelling above the area where the tissue has been removed. leaves tissue removed time swelling roots What causes the swelling? A Phloem vessels have been removed and sucrose cannot move to the sink. B Phloem vessels have been removed and sucrose cannot move to the source. C Xylem vessels have been removed and minerals cannot move to the sink. D Xylem vessels have been removed and minerals cannot move to the source.

1 marks

Answer: A

This question in 0970/22 Oct/Nov 2022

16 Sucrose and amino acids move around a plant from sources to sinks. Which row shows the sources and sinks? palisade root cortex cells xylem vessels mesophyll cells A source and sink neither source B sink sink source and sink C neither source and sink sink D source and sink source neither

1 marks

Answer: A

This question in 0970/21 May/June 2023

16 During an investigation into the movement of substances in a plant, a ring of tissue containing the outer part of the transport tissue is removed, as shown. swelling time epidermis and outer part of transport tissue Which statement explains why a swelling develops in the stem? A Phloem has been removed causing a build up of sucrose and amino acids. B Phloem has been removed causing a build up of water and mineral ions. C Xylem has been removed causing a build up of sucrose and amino acids. D Xylem has been removed causing a build up of water and mineral ions.

1 marks

Answer: A

This question in 0970/22 May/June 2023

18 Which statement is correct for a flowering plant during photosynthesis? A The flowers, fruits, leaves and roots are all sources of sucrose. B The fruits are a source of sucrose and the flowers are a sink. C The leaves are a source of sucrose and the fruits are a sink. D The roots are a source of sucrose and the leaves are a sink.

1 marks

Answer: C

This question in 0970/21 May/June 2024

17 The table shows the transport tissues of plants and some substances that may or may not travel through these tissues. Which row is correct for translocation? substance plant tissue transported A phloem maltose B phloem sucrose C xylem amino acids D xylem water

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2024

14 In some countries, spring is the time of year when daffodil plants have green leaves and produce flowers. Which parts of the daffodil plants act as sources and sinks in spring? flowers leaves A sink sink B source source C sink source D source sink

1 marks

Answer: C

This question in 0970/21 May/June 2025

13 What is translocation? A the movement of amino acids and water from sink to source B the movement of starch and water from source to sink C the movement of sucrose and amino acids from source to sink D the movement of sucrose and mineral ions from sink to source

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2025