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28 Cards in this Set
- Front
- Back
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What is metabolism?
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all chemical processes in your body.
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What is homeostasis?
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internal stability in spite of changes in the environment.
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Steps in the scientific method.
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observe, ask questions, form hypothesis and predictions, do experiments, and draw conclusions.
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What is the dependent variable?
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the variable that is measured in an experiment.
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What is the independent variable?
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the variable that changes in the experiment.
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The difference between theory in a scientific sense and non-scientific sense.
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In a scientific sense theory is what scientists are most certain of. In a non-scientific sense theory may imply a lack of knowledge, a guess.
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What are covalent bonds?
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when 2 or more atoms share an electron.
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What are ionic bonds?
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when opposite sides are attracted together.
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what are hydrogen bonds?
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attraction between polar molecules.
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Why is water polar?
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water has an unequal distribution of charge.
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why doesn`t water mix with lipids?
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lipids are non-polar.
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What is an organic macromolecule?
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made out of carbon.
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4 subunits & examples
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1. carbohydrates-simple sugar
ex- starch glycogen 2. lipids-fatty acids ex- fats and oils 3. proteins-amino acids ex- enzymes, hair, nails 4. nucleic acid-nucleotides ex- DNA and RNA |
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The relationship between simple sugars, starches, cellulose, and glycogen.
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simple sugars are subunits of all three. Find starches in plants thats how they store sugar for later. Cellulose in cell wall of plants. Glycogen is animal storage of sugar.
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What is a protein?
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a sequence of amino acids.
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What is a protein made of?
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amino acids.
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what determines proteins shape?
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chains of amino acids which are folded into compact shapes.
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what is an enzyme?
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speeds up chemical reactions.
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What does an enzyme`s active site do?
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it folds on it`s surface.
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What does an enzyme`s substrate do?
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it fits into its active site.
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what factors effect enzyme activity?
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temp. & acid levels.
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What is ATP.
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adeninsine triphosphate.
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what is ATP`s function?
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main energy form of the cell.
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how is ATP made?
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when food molecules are broken inside cells, same energy in the molecules is stored in ATP.
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what is fermentation?
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anaerobic respiration, no oxygen
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the pH scale.
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less than 7-acid
higher than 7-base |
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what is magnification?
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the quality of making an image look bigger.
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organelles in cells
eukaryotic |
nucleus
cell membrane smooth ER rough ER ribosomes mitochondrion golgi apparatus lysosome |
