B2.2–B3.2 Organelles, Gas Exchange & Transport
20 review questions with answers for B2.2–B3.2 Organelles, Gas Exchange & Transport, marked SL and HL. Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
What is the source of energy for primary active transport (e.g., the sodium–potassium pump)?
- ATP hydrolysisRight answer
- Spongy mesophyll
- Golgi apparatus
- Companion cells
All 20 questions and answers
What is the source of energy for primary active transport (e.g., the sodium–potassium pump)?
Answer: ATP hydrolysis
What is the term for releasing materials from a cell by vesicle fusion with the plasma membrane?
Answer: Exocytosis
What is the term for taking materials into a cell by engulfing them in a vesicle?
Answer: Endocytosis
What is the protein that coats the cytoplasmic side of a membrane to help it curve and form a vesicle?
Answer: Clathrin
What term describes a specialized structure within a cell with a specific function?
Answer: Organelle
What is the organelle where aerobic respiration produces ATP; has a double membrane?
Answer: Mitochondrion
What is the organelle where photosynthesis occurs in plants; has a double membrane?
Answer: Chloroplast
What is the organelle that modifies, packages, and distributes proteins and lipids?
Answer: Golgi apparatus
What do we call an organelle containing digestive enzymes for breaking down materials?
Answer: Lysosome
What is the network of protein filaments providing cell structure and movement?
Answer: Cytoskeleton
Small pores on the underside of a leaf that allow for gas exchange?
Answer: Stomata (singular: Stoma)
The two specialized cells that surround a stoma and control its opening?
Answer: Guard cells
The tissue layer in the leaf with many air spaces to allow gas circulation?
Answer: Spongy mesophyll
The waxy, waterproof layer covering the leaf (thickest on the upper surface) that reduces water loss?
Answer: Cuticle
The loss of water vapor from the leaves and stems of plants?
Answer: Transpiration
What is the term for the heart's ability to contract without external nerve signals?
Answer: Myogenic contraction
Specialized cells that provide metabolic support to phloem sieve tube elements?
Answer: Companion cells
The part of the plant where sugars are produced or released (e.g., leaves)?
Answer: Source
The part of the plant where sugars are used or stored (e.g., roots, fruits)?
Answer: Sink
What mechanism is used to move H⁺ ions out of the companion cell to create a gradient?
Answer: Proton pump (Active Transport)
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options are other answers from the same set.