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Bio. U1 Yr. 1
| Question | Answer |
|---|---|
| What is the molecule that serves as energy storage in plants and its two components? | starch; amylose and amylopectin |
| Is water polar or non-polar? | Polar |
| What is the charge of oxygen in water? | Slightly negative |
| What is the charge of hydrogen in water? | Slightly positive |
| What bonds form between water molecules due to the charges of it's atoms? | Hydrogen |
| What is the tendency of water molecules to "stick" to other water molecules called? | Cohesion |
| Current scientific evidence supports the theory that Earth's water came mostly from carbonaceous chondrites, a type of ____. | Meteorite |
| Evidence includes the fact that these extraterrestrial bodies contain the same ratio of deuterium to protium, both of which are ____ of hydrogen. | Isotopes |
| What is a reason for lipids being an effective energy storage molecule? | Lipids can store more than twice as much energy per gram as carbohydrates |
| Monosaccharides can form disaccharides by_reactions. This is a type of_metabolism. During this reaction,_is also formed. Polysaccharides can be broken down by_reactions. This is a type of_metabolism. During this reaction, water is a_rather than a product. | condensation; anabolic; water; hydrolysis; catabolic; reactant |
| A polymer of alpha-D-glucose found in plants has mostly 1,4 linkages and some 1,6 linkages. What molecule fits this description? | Amylopectin |
| Draw sucrose. | NOW !! |
| Draw amylose. | NOW!! |
| Draw alpha-glucose. | NOW !! |
| Draw cellulose. | NOWW!! |
| Adhesion is... | the attraction of water molecules to other charged or polar surfaces/molecules |
| Cohesion is... | the attraction of water molecules to other water molecules |
| Capillary action... | the tendency of a liquid to move upward against gravity when confined to a narrow tube |
| Surface tension is... | the surface of a liquid resists external forces due to cohesion between molecules |
| Buoyancy is... | the ability of a fluid to provide an upward force on an object placed in it |
| Thermal conductivity is... | a measure of how easily heat flows through a material |
| Liquid water has a_thermal conductivity than air and ice.Lipids've relatively_thermal conductivity.Allows fat act as_in aquatic mammals and air trapped against feathers to act as an insulator in aquatic birds.These properties help these animals maintain_. | higher; low; insulator; homeostasis |
| True or False? Glycogen is more highly branched than amylopectin. | True |
| Cellulose is a ____ macromolecule that functions for ____ in ____ This molecule is ____ to be broken down by the human digestive system because of a lack of the proper enzyme. | carbohydrate; strength and structure; plants; not able |
| Molecule = _. Fatty acids = _. O || H2C—O/\/\/\ /\/\/\ | O | || HC—O/\/\/\/\/\/\ | O | || H2C—O/\/\/\/\/\/\ | triglyceride; saturated |
| True or False? Steroid hormones like testosterone and estradiol can cross the cell (plasma) membrane because they are nonpolar. | True |
| What can be explained by the solvent properties of water? | Sodium chloride is transported as Na+ and Cl- in the blood |
| What makes a fatty acid cis and unsaturated? | Cis: H H \ / C=C Trans: H \ C=C \ H Saturated has single CC bond whereas unsaturated is double |
| Water can absorb a large amount of heat energy before the temperature changes. This is an example of water's ____ and accounts for bodies of water being able to resist great fluctuations in temperature. | high specific heat capacity |
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