| A | B |
|---|
| How do water molecules break up other polar substances? | because of uneven charge distribution, frees ions in these substances for use by the body |
| How is carbon different from many other elements? | It's 4 electrons in the outermost level bond with other carbon atoms |
| What do saturated fatty acids contain? | Hydrogen bonds that are bonded to all available carbon bonds |
| Why do scientists design experiments? | To find answers with expected experimental results. |
| What are subunits of DNA? | nucleotides |
| what is the sequence of levels of organization in an complex organism? | organelles,cells,tissues,organs,organ systems |
| What is the "control" of an experiment? | A consistant part of the experiment |
| What is the "sample size" of an experiment? | number of organisms that are tested in an experiment |
| what is needed for a valid conclusion in an experiment? | analysis of data gathered during an experiment |
| What scientist used the microscope to look at cork cells? | Hooke |
| What macromolecules contain nitrogen? | proteins and nucleic acids |
| Which macromolecule is not soluble in water? | lipids |
| What macromolecule can be broken down into subunits that are identical to each other? | carbohydrates |
| What is an example of a prokaryotic cell? | bacteria |
| What is an independent variable in an experiment? | variable that is changed |
| What is a dependent variable in an experiment? | variable that does not change |
| What macromolecule does Benedicts test for? | carbohydrates |
| How do catalyzed reactions affect the activation of energy of a reaction? | Enzymes speed up a chemical reaction which needs less energy |
| How do uncatalyzed reactions affect the activation energy of a reaction? | With no enzymes the reaction takes longer and needs more energy. |
| Why is water considered the universal solvent? | Because it is polar |
| What are the characteristics of life? | homeostasis,metabolism,reproduction,one or more cells and passed genetic information to offspring. |
| What are the four macromolecules? | carbohydrates,proteins,lipids and nucleic acids |
