Chap. 6: Plant nutrition Flashcards
Photosynthesis:
The process by which plants synthesise (make) carbohydrates from raw materials (minerals) using energy from light (the sun)
Water and CO2 react together to make?
Oxygen and glucose (carbs)
What part of the leaf does photosynthesis occur in?
Chloroplasts
What is chlorophyll and what is its purpose?
A green pigment in a leaf; easily able to capture energy from sunlight for photosynthesis
What are the 2 factors NEEDED for photosynthesis to occur?
Sunlight and Chlorophyll
photosynthesis depends on ___ to take place
enzymes
Balanced photosynthesis equation
6CO₂ + 6H₂0 –> C₆H₁₂O₆ + 6O₂
What are the 7 ways that the glucose produced is used?
Energy, food storage, sucrose, cellulose, nectar, amino acids , and making other substances
How can the energy from glucose be utilised?
Ex: moving mineral ions into root hairs; active transport
Ex: building protein molecules from amino acids for growth
What is the food storage in a plant?
Millions of starch molecules clumped together, also known as starch grains. can be broken down into glucose molecules.
What is the structure of sucrose in a plant and how it is used?
Coiled chains of glucose; can be easily transported through the plant, changed back into glucose, and used to release energy
Why is glucose needed for cellulose?
Cellulose is needed to make cell walls for the new cells being made in a plant, and they are made of glucose molecules in long chains.
What happens when insects pollinate plants and how does glucose factor into this?
Male gametes of flowers require insects to move them from flower to flower (in pollen grains). In doing this the insects also get nectar from plants, produced by different kinds of sugar from glucose
What elements are in amino acids; what can it be used to produce?
C,H,O,N; proteins, for growth
Where do plants get their source of nitrogen to make amino acids?
the soil, in the form of nitrate ions. These enter through the root hairs, through active transport.
