Translocation (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is a key characteristic of translocation compared to water transport in xylem?
What is a key characteristic of translocation compared to water transport in xylem?
It requires energy and living cells
Why is sucrose the main transport sugar rather than glucose?
Why is sucrose the main transport sugar rather than glucose?
It doesn't affect water potential as much
What defines a source in translocation?
What defines a source in translocation?
A region with high sucrose concentration
Which of these is an example of a sink?
Which of these is an example of a sink?
Growing root meristems
How can a potato tuber change its role in translocation?
How can a potato tuber change its role in translocation?
Sink when storing, source when sprouting
What happens to radioactive sucrose in a ringed plant where phloem is removed?
What happens to radioactive sucrose in a ringed plant where phloem is removed?
Accumulates above ring, doesn't pass it
What is the role of companion cells in translocation?
What is the role of companion cells in translocation?
Provide ATP for active transport
What happens when sucrose accumulates in sieve tubes at the source?
What happens when sucrose accumulates in sieve tubes at the source?
Water potential lowers, water enters
How does mass flow differ from diffusion?
How does mass flow differ from diffusion?
Pressure-driven bulk solution movement
Why does translocation require living cells?
Why does translocation require living cells?
Active transport needs ATP from mitochondria