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the big shabang
Biology
| Question | Answer |
|---|---|
| polarity | the condition of having 2 opposing sides with diff charges |
| free | a polar molecule has an uneven distribution of charge |
| true or false: hydrogen bonds are weak | true |
| cohesion | H20 molecules are attracted to each other |
| adhesion | H20 molecules are attracted to other polar substances |
| 5 properties of water | capillary action, high surface tension, high heat of vaporization, expands when it freezes, resists temperature change |
| what type of molecule is water | a polar molecule |
| what do chemical reactions involve | breaking or forming bonds between atoms |
| free | the reactants are what's needed, the product is what's made |
| is an energy releasing reaction spontaneous? | yes |
| is an energy absorbing reaction spontaneous? | no. they require activation energy to get started |
| what are enzymes | proteins that act as catalysts, speeding up the rate of a chemical reaction by reducing the amount of energy needed to start it. |
| what does each enzyme have in order to accept a substrate? | a specific shape |
| what attaches to the enzyme's active site? | the substrate |
| what are substrates | the shapes |
| what is the active site | where the substrates bind |
| synthesis | molecules are joined together (making of) |
| decomposition | molecules are broken apart (breaking down |
| example of decomposition reaction using enzymes | lactase breaks down lactose in milk |
| example of synthesis using enzymes | helicase unwinds DNA strands for copying during cell division |
| free | enzymes change one molecule (substrate) into another (product) |
| true or false: enzymes that catalyze the breakdown of substances usually release energy | true |
| what reactions require the input of energy? | anabolic reactions (requires the input of energy to build molecules) |
| when do the substrates leave after binding to an active site? | after a chemical reaction finish (when the substrates convert to a product) |
| what are the 2 types of microcopes | light and electron |
| who is zacharias janssen | a dutch spectacle maker, made the 1st compound microscope (1590) |
| who is Robert Hooke | used a crude microscope to observe cork. called his observations cells. (1665) |
| who is Anton van leeuwenhoek | a dutch merchant who experimented with the grinding of lenses made a simple microscope (only one lens) (1674). father of microscopy. |
| resolution | clarity |
| acid solutions | chicken soup, orange juice, soda, vomit |
| if you add water, will it change the pH? | yes |
| adding water to a basic solution | lowers pH |
| adding water to an acidic solution | increases pH |
| pH means | the potential of hydrogen |
Created by:
Beia Aria