Sherpa

Existing user?

Biology

GCSE · AQA

QuestionsFlashcards

Communicable Diseases
Monoclonal Antibodies
- Producing Monoclonal Antibodies
  6
- Uses of Monoclonal Antibodies
  7
Plant Disease
- Detection and Identification of Plant Diseases
  6
- Plant Defence Responses
  6

Active transport Flashcards

All 6 cards in this deck

What is active transport?: The movement of substances from a more dilute solution to a more concentrated solution (against the concentration gradient), using energy from respiration.
Where does the energy for active transport come from?: From respiration (in the mitochondria).
How are mineral ions absorbed into plant root hair cells from very dilute soil solutions?: By active transport, against the concentration gradient, using energy from respiration.
Why do plants need to absorb mineral ions such as nitrate ions?: For healthy growth — e.g. nitrate ions are used to make amino acids and proteins.
How are sugar molecules absorbed from the gut when the blood already has a higher sugar concentration?: By active transport, against the concentration gradient; the sugar is then used for cell respiration.
True or false? Cells carrying out a lot of active transport usually contain many mitochondria.: True. Mitochondria release the energy from respiration needed for active transport.