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BIOL211.ex1

ex1

QuestionAnswer
1*. How does a scientific theory differ from a scientific hypothesis? A theory is an explanation for a very general phenomenon; hypotheses treat more specific observations.
2. Which statement about spontaneous generation is false? It occurs every time a new species evolves from a preexisting species.
3. Which of the following is the independent variable in the TOMATO PLANT experiment (4 vs. 8 hr sunlight) The amount of the sun light
4. The growth rate is the dependent variable in the TOMATO PLANT experiment (4 vs. 8 hr sunlight) (T/F): True
5. Which of the following is the controlled variable in the TOMATO PLANT experiment (4 vs. 8 hr sunlight). “All of the above”: The size of the plant containers, The type of fertilizer you are using, The duration of the experiment
6. Community is defined as a group of individuals of the same species living in the same area at the same time. (T/F): False
7. Which of the following is mismatched. Archaebacteria: multicellular
8*. How many electrons are involved in a triple covalent bond? Six
9. When are atoms most stable? When all the electron orbitals in the valence shell are filled
10. The difference between a polar covalent bond and an ionic bond is that electrons are shared unequally in a polar covalent bond but completely transferred (i.e, not shared) in an ionic bond. (T/F): True
11. In your first job as a chemist you are given the paperwork for a newly discovered element that has an atomic number of 110. It contains 110 protons.
12. Which of the following is not true about water? Solid water is denser than liquid water.
13. Which statement is incorrect? placebo effect: in which the subject of a drug experiment actually takes the drug being tested and shows signs of improvement.
14. Urinary tract infection can cause urine pH to become alkaline? (T/F): True
15. There are 4 elements that make up 95% of all matter found in organisms. Which of the following is not one of these? Calcium
16*. Which is not a role proteins play in organisms? Store genetic information
17. Which one of the following is not a component of each monomer used to make proteins? a phosphorous atom, P. (a side chain R, an amino functional group NH2 and a carboxyl group, COON are all protein components)
18. A peptide bond is a particularly stable, planar covalent bond
19. The sequence of amino acids in a protein chain when polymerization of a protein is complete, but the protein is still completely linear is called ___ structure. primary
20. Which statement is true about enzymes They perform their enzymatic activities by lowering the activation energy
21. Which of the following would be an example of a cofactor? The nonprotein heme group in a hemoglobin molecule.
22. Allosteric inhibition occurs when the active site of an enzyme is directly blocked by the competitive inhibitor, which leads to the inhibition of the binding of the substrate to the enzyme. (T/F): False
23. Nucleic acids are polymers made up of which of the following monomers? nucleotides
24. What is the difference between a ribonucleotide and a deoxyribonucleotide? ribonucleotides have a hydroxyl group on the 2' carbon of their sugar subunit
25. What forms the "backbone" of a nucleic acid? a chain of sugar and phosphate groups, linked through phosphodiester bonds
26. What is responsible for holding the 2 strands together in the DNA double helix? hydrogen bonds
27*. Many researchers consider RNA to be the best candidate for the first-life-form because it is capable of self-replication and catalysis. (T/F): True
28. DNA differs from RNA in that the DNA molecule but not the RNA molecule can contain the nitrogenous base T (RNA contains U not T)
29. The 2 strands in a DNA double helix run in parallel (T/F): False (they run antiparallel)
30*. Chargaffs rule: the DNA of any given species contains equal amounts of adenine & thymine, & guanine/cytosine bases. If the DNA of an organism has guanine as 10% of its bases, then what % of its bases would be adenine? 40%
31. Stem-loop structure and ribozyme are referred to certain ___ structures RNA
32. Which of the following sugars might have the formula C6HI206? hexose
33. Which of these best reflects the following relationship: monosaccharide vs polysaccharide? glucose versus glycogen
34. Lactose intolerance occurring in some individuals is due to the absence of sugar lactose in these individuals. (T/F) False
35. If you were going to develop a new antibiotic, you would probably need to become an expert on which of these carbohydrates? peptidoglycan
36. Diffusion refers to movement of solutes from high solute concentration to low concentration of solutes.
37. If you place a red blood cell in a beaker containing hypotonic solution, the red blood cell will swell & burst
38. In animals the role of carbohydrate polymers is primarily energy storage
39. In the lactase lab, the heat-treated lactase had lost its enzymatic activity due to its denaturation. (T/F) True
40. The term phospholipids can best be described by which of the following? a nonpolar lipid molecule that is made amphipathic by the addition of a phosphate
41. Which of the following is the best explanation for why vegetable oil is a liquid at room temperature while animal fats are solid? vegetable oil has more double bonds than animal fats —
42. Which of the following modes of transport across the cell plasma membrane require ATP expenditure? active transport. (Facilitated and passive diffusion do NOT require ATP expenditure)
43. According to the fluid-mosaic model, phospholipid constituents of the phospholipid bilayers of the plasma membrane are dynamic (having the ability to move around). (T/F): True
44*. Proteorhodopsin consists of a single polypeptide chain. What is the highest level of structure found in this protein? tertiary
Created by: boborii
 

 



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