B4 Definitions

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Mitochondria
Contain enzymes to carry out respiration and this is where energy is made inside a cell
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Cell Membrane
Allows gases and water to pass in and out of the cell
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Nucleus
Contains DNA which carries the genetic code for making enzymes
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Cytoplasm
Liquid part of the cell where to enzymes and other proteins are made
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Animal Cells
Made up of a nucleus, cell membrane and cytoplasm
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Plant Cells
Made up of nucleus, cell membrane, cytoplasm, chloroplasts, vacuole and cell wall
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Chloroplasts
Contain chlorophyll and the enzymes for the reactions in photosynthesis
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Respiration
A chemical reaction that takes place inside a cell that releases energy
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Photosynthesis
A chemical reaction that takes place inside plant cells that makes glucose (carbon dioxide + water = glucose + oxygen)
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Aerobic Respiration
Takes place in animal and plant cells and some microorganisms, and requires oxygen
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Anaerobic Respiration
Takes place in animal, plant and some microbial cells in conditions of low oxygen or absence of oxygen
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Limiting Factors
Factors such as temperature, sunlight and carbon dioxide that limit the rate of photosynthesis
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Chlorophyll
The green pigment found in chloroplasts which absorbs sunlight
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Enzymes
Proteins that speed up chemical reactions
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Optimum
The best conditions for enzymes to work at
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The lock and key model
Molecules have to be the correct shape to fit into the active site of the enzyme
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Denature
The shape of the enzyme changes if the temperature is too high and the enzyme stops working and cannot go back
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Active Site
The surface of the enzyme that fits into the substrate
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Passive
Requires no energy
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Diffusion
Is the passive overall movement of molecues from a region of their higher concentration to a region of their lower concentration
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Osmosis
Is the overall movement of water from a dilute to a more concentrated solution through a partially permeable membrane
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Partially Permeable Membrane
A cell membrane which allows only certain substances through it
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HT Active Transport
Is the overall movement of chemicals across a cell membrane requiring energy from respiration
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Other cards in this set

Card 2

Front

Allows gases and water to pass in and out of the cell

Back

Cell Membrane

Card 3

Front

Contains DNA which carries the genetic code for making enzymes

Back

Preview of the back of card 3

Card 4

Front

Liquid part of the cell where to enzymes and other proteins are made

Back

Preview of the back of card 4

Card 5

Front

Made up of a nucleus, cell membrane and cytoplasm

Back

Preview of the back of card 5
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