Back to AI Flashcard MakerBiology /A-level Biology - 3.3.2 Photosynthesis Part 1
Describe how ATP is synthesised
ATP is synthesised via condensation reaction between ADP and P¡ (inorganic phosphate) using energy from an energy-releasing reaction
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Key Terms
Term
Definition
Describe how ATP is synthesised
ATP is synthesised via condensation reaction between ADP and P¡ (inorganic phosphate) using energy from an energy-releasing reaction
What enzyme catalyses ATP synthesis?
Enzyme ATP synthase
Where is the energy stored in ATP?
Energy is stored as chemical energy in the phosphate bond
What happens when ATP arrives (via diffusion) to a part of cell that needs energy?
ATP is hydrolysed back into ADP and P¡ Chemical energy is released from phosphate bond and used by cell
What enzyme catalyses ATP hydrolysis?
ATP hydrolase
ADP and P¡ are _____
recycled
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| Term | Definition |
|---|---|
Describe how ATP is synthesised | ATP is synthesised via condensation reaction between ADP and P¡ (inorganic phosphate) using energy from an energy-releasing reaction |
What enzyme catalyses ATP synthesis? | Enzyme ATP synthase |
Where is the energy stored in ATP? | Energy is stored as chemical energy in the phosphate bond |
What happens when ATP arrives (via diffusion) to a part of cell that needs energy? | ATP is hydrolysed back into ADP and P¡ Chemical energy is released from phosphate bond and used by cell |
What enzyme catalyses ATP hydrolysis? | ATP hydrolase |
ADP and P¡ are _____ | recycled |
Draw an ATP molecule | |
Name and explain 6 properties that ATP has that makes it a good energy source | Stores or releases only a small, manageable amount of energy at a time ∴ no energy is wasted as heat It’s a small, soluble molecule ∴ it can be easily transported (Easily) broken down in 1 step = energy can easily released instantaneously It can be quickly re-made Can make other molecules more reactive by transferring one of its phosphate groups to them (phosphorylation) ATP can’t pass out of cell = cell always have immediate supply of energy |
Define a metabolic pathway | Series of small reactions controlled by enzymes e.g. respiration and photosynthesis |
Define Phosphorylation | Adding phosphate to a molecule e.g. ADP → ATP |
Define Photolysis | Splitting (lysis) of a molecule using light (photo) energy |
Define Photophosphorylation | Adding phosphate to a molecule using light |
Define Photoionisation | When light energy excites electrons in an atom Giving them more energy and causing them to be released Release causes atom to become positively-charged ion |
Define Hydrolysis | Splitting (lysis) of a molecule using water (hydro) |
Define Decarboxylation | Removal of CO2 from molecule |
Define Dehydrogenation | Removal of hydrogen from molecule |
Chloroplasts contain _________ _____ | Photosynthetic pigments |
What are photosynthetic pigments (e.g. chlorophyll a, chlorophyll b and carotene)? | Coloured substances that absorb light energy |
Where are pigments found? | Thylakoid membranes = attached to proteins |
What is a photosystem? | Protein + pigment |