Biology: Photosynthesis Flashcards
What are chloroplasts
Very large cell organelles
Most abundant in palisade mesophyll leaf cells
Where both stages of photosynthesis occur
What is the word equation for photosynthesis
Carbon dioxide + water ———>glucose + oxygen
What is the fate of glucose
It is either stored as starch for storage or used to synthesise cellulose for building cell walls
What are the limiting factors
If these factors are in short supply they restrict the rate of photosynthesis
Light intensity
Temperature
Carbon dioxide concentration
What is the importance of nitrates
•they are used to make amino acids
•nitrates dissolved in soil water are absorbed into plants
•amino acids are synthesised into plant proteins
•fertilisers can be added to soil to increase the nitrate content of the soil
• plants and animals need protein for growth
• animals consume plants or other animals to obtain amino acids for protein synthesis
What is an essential nutrient for plant growth
Nitrogen
What are the two stages of photosynthesis called
Light reaction and carbon fixation
LR1)Light energy from the____ are trapped by ______ in the ______
Sun chlorophyll chloroplasts
LR2)Light energy is converted into ____ _____ which is used to generate ___
Chemical energy ATP
LR3)______ is split to produce ______ and _______
Water hydrogen oxygen
LR4)_____ diffuses from the cell
Oxygen
LR5)The _____ _____ in sugar is available for _______ or the sugar can be converted into others such as ______(storage) and _______(structural)
Chemical energy respiration starch cellulose
CF1)carbon fixation is a series of _____ _____ reactions
Enzyme controlled
CF2)______ and ____ (produced by light reactions) react with carbon dioxide to produce ______
Hydrogen ATP sugar
CF3) the _____ ______ in sugar is available for ________
Chemical energy respiration
