Photosynthesis
18 review questions with answers for Photosynthesis. Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
Two products of photosynthesis?
- Carbon dioxide and water
- Glucose and carbon dioxide
- Oxygen and water
- Glucose and oxygenRight answer
What this set covers
Equations, leaf structure and limiting factors make up this set on photosynthesis, covering glucose and oxygen, chlorophyll, stomata, cuticle, xylem and phloem, light intensity, pondweed bubble counts, and magnesium and nitrate ions.
- Common mix-up
- Students often mix up xylem and phloem: xylem carries water up to the leaves, while phloem carries sugars from the leaves to the rest of the plant.
- Review tip
- Write the word and balanced equations from memory, then draw a leaf cross-section and label where each reactant enters and each product leaves.
All 18 questions and answers
Two products of photosynthesis?
Answer: Glucose and oxygen
Products in the balanced equation 6CO₂ + 6H₂O → …?
Answer: C₆H₁₂O₆ + 6O₂
Green pigment that absorbs light energy?
Answer: Chlorophyll
Photosynthesis takes in energy from the surroundings, so it is…?
Answer: Endothermic
In photosynthesis, light energy is converted into which store of energy in glucose?
Answer: Chemical
Gas that diffuses into a leaf for photosynthesis?
Answer: Carbon dioxide
Pores, mainly on the underside of a leaf, that let gases in and out?
Answer: Stomata
Waxy, waterproof layer covering the upper surface of a leaf?
Answer: Cuticle
Leaves are thin to give gases a…?
Answer: Short diffusion distance
Tissue that carries water up to the leaves?
Answer: Xylem
Tissue that carries sugars from the leaves to the rest of the plant?
Answer: Phloem
Name for whatever is in shortest supply and so holds back the rate of a reaction?
Answer: Limiting factor
A plateau on a graph of photosynthesis rate against light intensity shows that light is…?
Answer: No longer limiting
If a lamp is moved to twice the distance from a plant, light intensity becomes…?
Answer: One quarter
Gas counted as bubbles from pondweed to measure the rate of photosynthesis?
Answer: Oxygen
Mineral ion at the centre of each chlorophyll molecule?
Answer: Magnesium
Mineral ion plants absorb from the soil to make amino acids?
Answer: Nitrate
In an iodine test on a variegated leaf, which parts stay orange-brown?
Answer: The white areas
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 were written for that question.