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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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lipids
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Lipids are energy-rich, organic compounds made of carbon, hydrogen and oxygen. Fats, oils and waxes are all lipids.
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carbohydrate
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A carbohydrate is an energy-rich organic compound made of tthe elements carbon, hydrogen, and oxygen. Sugars and starches are examples of carbohydrates.
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nucleic acid
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A nucleic acid is a very large organic molecule made of carbon, oxygen, hydrogen, nitrogen an dphosphorus. Nucleic acids contain the instructions that cells need to carry out all the functions of life.
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enzyme
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An enzyme is a type of protein that speeds up a chemical reaction in a living thing. Without enzymes, many chemical reactions that are necessary for life would either take too long or would not occur at all.
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Enzymes in your saliva speed up the digestion of food by breaking down starches into sugars in your mouth.
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protein
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A protein is a large organic molecule made of carbon, hydrogen, oxygen, nitrogen and in some cdases, sulfur. Foods high in sulfur include meat, eggs, fish, nuts, and beans.
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element
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An element is any substance tha cannot be broken down into simple substance. An element is made up of only kind of atom.
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The elements found in living things include carbon, hydrogen, oxygen, nitrogen, phosphorus and sulfur.
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atom
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The smalles unit of an element is called an atom.
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compound
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When two or more elements combine chemically they form a compound.
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When hydrogen and oxygen combine in the right proportion, they make a compound called 'water' or H2O.
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molecule
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The smallest unit of a compound is called a molecule. Water, for example, is a compound of made up of hydrogen and oxygen.
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organic compound
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Most compounds that contain carbon are called organic compounds. Many of these compounds are found in living things.
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inorganic compound
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Compounds that don't contain the element CARBON are called inorganic compounds. There is one exception to this rule: carbon dioxide, CO2, is an inorganic compound.
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diffusion
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The process by which molecules tend to move from an area of higher concentration to an area of lower concentration.
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selectively permeable
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A cell membrane is ______________ which means that some substances can pass through the membrane while other substances cannot pass through it.
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substances
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another word for 'stuff' or 'material'
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transport by engulfing
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This is another method of active transport. First, the cell membrane surrounds, or engulfs, a particle. Then, once the particle is engulfed, the cell membrane pinches off and forms a vacuole within the cell. The cell will use energy in this process.
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active transport
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Active transport is the movement of materials (of substances) through a cell membrane using energy.
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passive transport
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The movement of materials through a cell membrane without using energy is called passive transport.
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photosynthesis
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The process by which a cell captures the energy in sunlight and uses it to make food is called 'photosynthesis'.
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pigment
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a colored chemical compound that absorbs light, producing color
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stomata
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The small openings on the underside of most leaves through which oxygen and carbon dioxide can move.
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chlorophyll
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the main pigment found in the chloroplasts of plants
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