Key Concepts in Biology Flashcards
What are enzymes?
They break down food to allow our body to absorb nutrients
What factors cause an active site to denature?
If the temperature is too high or acid levels are too low
How do enzymes work?
The active site of an enzyme attaches with a substrate it fits like a lock and key method then when the substrate is released it has been broken down.
What does an animal cell contain?
Cell membrane, nucleus, mitochondria, cytoplasm
What is in an plant cell?
Ribosomes, cell wall, cell membrane, mitochondria, nucleus, cytoplasm, chloroplasts
What is the role of chloroplasts?
Photosynthesis
What is the purpose of the cell wall?
Protection and structure
What are ribosomes responsible for?
Protein synthesis
What does mitochondria do?
Releases energy
What is the purpose of the cell membrane?
To control movement in and out of cells
What does a cytoplasm do?
Holds organelles and where the chemical reactions happen
What is diffusion?
The movement of a substance from an are of high to low concentration for example CO2 to a plant
What is osmosis?
Movement of water from high to low concentration through a semi permeable membrane
What is active transport?
When a particle is too large to pass through the cell membrane
How does the red blood cell differntiate?
It is a concave shape to maximise surface area, they are small to fit through narrow vessels
