B150MT1F97 - BIL 150 Test #l 23 September 1997 FORM 0 Fall...

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Unformatted text preview: BIL 150 Test #l 23 September 1997 FORM 0 Fall 1997 Mallery - Sections PT/P2 MULTIPLE CHOICE Instructions: Pick the BEST answer choice form among those given. 1. A scientific hypothesis that has stood the test of time is often referred to as ? a) ironic science b) untestable c) a theory d) deductive reasoning e) choose this answer if none of the above is correct 2. The set of experimental conditions with everything identical, except for one variable, is called the ? a) double blind test b) control c) hypothesis d) critical thinking e) choose this answer if none of the above is correct 3. The listed sequence of the levels of biological organization, from smallest to largest, is correct ? a) true b) false (smallest--->) molecules -> organism -> organ --> population 4. Algae and unicellular Prokaryotes are found in which of the following Kingdoms ? a) Animalia b) Plantae c) Protista d) fungi e) none of these above is correct 5. A cell may be described as a mix of inanimate biomolecules, which were selected for their fitness to perform certain biochemical functions ? a) true b) false 6. The theory, espoused by scientists as Arrenheius and Crick, which suggests that either the molecular precursors of life or primitive life itself may have been seeded on Earth by meteorites is called ? a) Panspermia b) SETI c) Special Creation d) chemical evolution e) choose this answer if none of the above is correct 7. The laws of the universe which govern the living state, the chemical and physical properties of cells, are unique to cells and operate differently than other physical laws in the universe ? a) true b) false 8. The first step believed to have occurred in origin and evolution of life on Earth was the abiotic synthesis of small inorganic molecules such as hydrogen cyanide and formaldehyde ? a) true b) false 9. Polymeric synthesis of molecules from simple monomers most commonly takes place by which of the following types of chemical reaction? a) hydrolysis b) templating c) condensation d) panspermia e) choose this answer if none of the above is correct 10. Organisms capable of synthesizing all their needed organic molecules from simple inorganics as CO2 and H2O are classified as ? b) autotrophs c) tierrians d) catabolizers a) heterotrophs e) choose this answer if none of the above is correct 11. An increase in the mass or size of an organism is referred to as ? b) cell division a) differentiation c) growth d) animation e) none of these 12. The number of neutrons does not equal the number of protons in which of the following ? b) an isotope c) hydrogen d) an isomer e) none of these is correct a) UC6 BIL 150 Fall 1997 - test # 1 - FORM 0 13. The key property of living systems which defines them as living, is most likely, their ability to ? a) die b) osmoregulate c) metabolize d) self-replicate e) choose this answer if none of the above is correct 14. Which of the following attributes are possessed by living cells ? a) contains an isothermal mix of biomolecules b) can extract energy from its surroundings c) maintains a steady state far from equilibrium d) metabolizes e) choose this answer if all of the above are attributes of living cells 15. The atomic number of an element is ? a) number of proton + electrons d) number of protons b) number of neutrons + electrons c) number of electrons e) choose this answer if none of the above is correct 16. An electrically charged atom is called a(n) ? c) ion a) isotope b) isomer d) neutron e) none of these is correct 17. The electrostatic sharing of a pair of electrons between the nuclei of two atoms is called ? b) a hydrogen bond c) a covalent bond d) a polymer a) an ionic bond e) choose this answer if none of the above is correct 18. The surface tension of water is quite high, allowing objects with considerable mass to float on its surface due to a property called cohesion. The property of cohesion is due primarily to the physical property of c) heat of fusion water called ? a) hydrogen bond b) specific heat e) none of these is correct d) gaseous properties of water 19. 540 calories of heat is dissipated when an athlete sweats during exercise. This lost of excess heat is due most specifically to which of the following physical properties of water ? d) its heat of vaporization a) its surface tension b) heat of fusion c) its density e) choose this answer if none of the above is correct 20. If the pH of Coke-Cola is 3.0 then it is considered to be ? c) neutral d) to have l0-12 mole of hydrogen ions a) an acid b) a base e) choose this answer if none of the above is correct [H2N-C-COOH] 2 1. At pH 11 one would expect a typical amino acid to be ? R a) (+) positively charged b) neutral (no charge) d) choose this answer if none of the above is correct c) (-) negatively charged 22. The class of organic molecules that contains a glycerol molecule and 3 long chain hydrocarbon fatty b) a triglyceride c) glycogen d) a steroid a) a nucleotide acids is ? e) choose this answer if none of the above is correct 23. One of the most significant observations about the interaction of molecules in living systems is that their shape and conformation is critically important to their biological activity and thus helping to define the b) false living condition? a) true 24. The structural arrangement of the atoms in water results in it being a molecular dipole with an unequal distribution of electrical charge making one end slightly positive and the other side slightly negative? a) true b)false BIL 150 Fall 1997 - test # 1 - FORM 0 25. The atomic number of carbon is 6, which means it is capable for forming covalent bonds with other elements to form complex molecules ? a) 6 covalent bonds b) 4 covalent bonds c) 2 covalent bonds d) choose this answer if carbon is unable of forming covalent bonds 26. A molecule with the same molecular formula, but a different structural formula is called a(n) ? a) isotope b) isomer c) isosceles d) dextrorotatory unit e) none of these 27. Which of the following is a polysaccharide ? a) cellibiose b) glycogen c) cholesterol d) glucose 28. Which of the following molecules is a dissacharide ? a) adenine b) glucose c) maltose d) ribose 29. The polar end of a phospholipid molecules is called its b) hydrophilic end a) hydrophobic end e) choose this answer if none of the above is correct e) none of these is a polysaccharide e) none of these is a dissacharide end? c) alpha end d) 5’ end 30. Sterols and steroids, as cholesterol, are classified as lipids because they are insoluble in water? a) true b) false 3 1. A long chain hydrocarbon fatty acid that is unsaturated might be found in which of the following ? b) nucleotide c) dissacharide a) a triglyceride d) a carbohydrate e) choose this answer if none of the above is correct 32. A nucleotide monomer would be expected to contain which of the following chemical parts ? b) a nitrogenous base, as adenine c) a 5 C sugar a) a phosphate group d) choose this answer if it would be expected to contain all of these 0 33. The functional group represented by the chemical formula shown to the right is ? a) amino group b) carboxyl group c) phosphate group d) sulfhydryl group e) none of these I -C-O-H 34. Proteins are often classified by their function. The class of proteins which can change their shape and length and also make up elements of the cytoskeleton and muscles are called ? d) storage proteins a) transport proteins b) defensive proteins c) contractile proteins e) choose this answer if none of the above is correct 35. The native conformation of most cellular proteins has a interior of ionically charged and hydrophilic amino acids surrounded by a exterior of very hydrophobic amino acids, making most proteins insoluble a) true b)false in aqueous solutions? 36. An amino acid contains the following chemical function groups: an amino group and a d) zwitter group a) phosphate group b) sulfhydryl group c) carboxyl group e) choose this answer if none of the above is correct group? 37. The alpha helix and (beta) pleated sheet protein structural formations occur mostly at ? b) secondary level c) tertiary level d) quatemary level a) primary level e) choose this answer if none of the above is correct 38. The linear sequence of amino acids best defines which level of protein structure ? b) secondary c) tertiary d) quatemary e) none of these is correct a) primary 39. The thermodynamically most stable shape a protein assumes under standard cellular conditions is its a) true b) false native conformation ? 40. Which of the following molecular forces is involved at the tertiary level of protein structure? c) hydrophobic interactions a) disulfide covalent bonds b) ionic bonds d) choose this answer if all of these forces are involved at the tertiary leve1 41. The process of a protein regaining its biological activity after having lost it is called? b) renaturation c) condensation d) inhibition a) hydrolysis e) choose this answer if none of the above is correct 42. The level of protein structure in which more than one polypeptide interacts at the molecular level to produce a final stable 3-dimensional protein shape is ? e) none of these is correct b) secondary c) tertiary d) quatemary a) primary 43. A graphical plot of the rate of an enzyme catalyzed vs. the temperature of the enzyme reaction reveals an ever increasing (linear) rate, i.e., as the enzyme amount doubles so does the rate of the reaction? b) false a) true 44. Which of the following best represents a “rate” measurement for an enzyme catalyzed reaction? d) mg per minute e) none of these b) 30 seconds a) mg of substrate c) Km 45. From the list of proteins given below, pick the one that is a complex protein ? d) lipoproteins b) globulins c) histones a) albumins e) choose this answer if none of the above is correct 46. Which of the following statements is correct concerning the properties of enzymes? b) accelerate chemical reactions c) function as a catalyst A) are mostly proteins e) choose this answer if all of the above are true d) may break or form covalent bonds 47. The linear sequence of the glucose monomers making up the polysaccharide amylose in corn plants is structurally different than the amylose polymers of glucose found in other plants? b) false a) true 48. The linear sequence of amino acids which occurs in the enzyme sucrase from humans is capable of being polymorphic and having a different amino acids sequence than the sucrase enzyme found in cattle? b) false a) true 49. The place on the structure of an enzyme where a substrate binds is called ? d) the levorotatory site b) active site c) its optimal activity a) product e) choose this answer if none of the above is correct 50. When the rate of an enzyme catalyzed reaction is at substrate saturation, the enzyme is said to be at its? d) active site c) maximum velocity (Vmax) b) optimization a) Km e) choose this answer if none of the above is correct ...
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This note was uploaded on 02/10/2012 for the course BIL 150 taught by Professor Gaines during the Fall '07 term at University of Miami.

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