B150MT1-2F05 - .r-f.'f r Bil150-PT/’,aiizoos Foniyio...

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Unformatted text preview: , .r , _ /-f . ,_.» 'f',-- r} . Bil150-PT ////’ // / ,aiizoos Sep 27, 2005 Foniyio F/er/Lq Test1 \ ‘x. Multi le Choices: Directions: Pick the BEST answer from those iven. p g /.— can/ed" 01. The growth of human populations up to the 20“1 century has been? ‘8) exponential b) arithmetical c) stable d) always declining e) none of these 02. A scientific principle not able to be disproved by continuous experimental testing is most likely referred to by scientists as? a) an article of faith do) a theory. 0) a failed experimental thesis d) an observation e) none of these is correct I 03. Bil 150 is required of all college students receiving a baccalaureate degree. You are a college student, therefore you must be educated. This is most likely an example of what type of scientific reasoning methodology? a) deductive reasoning b) a theory 0) a hypothesiwt) inductive reasoning e) none of these 04. Radioactive dating puts the estimated age of the earth closest to about? ) 4.6 billion years b) 500 years 0) 10,000 years d} 1.0 million years e) none of these is correct 05. Which of the following statements is (are) correct? a) all cells contain membranes b) all living things are composed of cells c) all ceiis arise from pre-existing cells I) choose this answer if alt of these are correct 06. The theory oi bioIOQY. which defines the processes by which organisms may change their structure , and form over time is known as? a) cell theory b) Panspermia ’2) evolution d) the genomic initiative e) choose this answer if none of the above is correct 07'. Suppose that the pH within a mitochondrion is 6.45 and the pH within a plant cell vacuole is 7.25. Choose the "correct" statement regarding this situation. a) vacuole is more basic than mitochondria b) mitochondria is more acidic than vacuole c) vacuole contains a greater number of OH ions than mitochondria d) the concentration of H+ is less in the vacuole ’) choose this answer if all of these are correct 08. "Peptide bond" is to "amino acid" as " ” is to "monosaccharide”. ’)glycosidic bond b) phosphodiester bond c) hydrogen bond d) all of these e) none of these 09;! Which of the following molecules when compared to the others would be classed as the most structurally unique in the sense of being species specific? o a) glycogen b) testosterone c) glycine d) phospholipid ’e) hemoglobin 60:] Choose the one of these bonds most likely to be a "peptide bond" ? ’)N-=CO b)-S-S- c)---COC- od)H--NH e--)OH 11 The smallest portion of an atom, the part which has the littlest mass of an atom is the? a) molecule ’b) electron c) proton d) neutron e) none of these is correct ”(‘1 21lWhich of the following is the strongest molecular force invoived within tertiary structure in “' ' globular proteins? 0 a) hydrophobic interactions b) alpha helix formation 0) hydrogen bonds ’) disuftide bridges e) none of these . a \ I ._ L13;- Which of the following is a specific example of a true biological polymeric molecule? . a) sucrose b)afatty acid oc)monosaccharide d)NutraSweet /) none ofthese Q Bil 150 fall 2005 Test 1 ~ form 0 - page 2 14. A buffer is a substance that resists changes in pH. ’3) true b) false (5)) Protein X has 3 amino-ends and 3 carboxyI-ends with a total of 300 amino acids residues. Which of the following might you conclude with certainty about protein X ? la-)'i't has a total of 299 peptide bonds ’1‘! has quartemary structure 2' c) it is composed of 3 equal length polypeptide chains ,d) entire protein shows alpha helical structl'ev e) none of the above is correct 16. Hydrogen bonds? a) can form between any chemical groups having a hydrogen atOm ‘ i. b) contain about the same energy (strength) as covalent bonds ’) are required for the secondary level of protein structure d) must involve amine groups e) none of the above @ Which of the following is incorrect? 0 . éaLtriglycerides are common storage forms otiat Diagrmation of a giycosidic bond releases H20 i) 9 CH3 group of fatty acids is bound to glycerol 4 d) complete hydrolysis of glycogen yields only glucose e) choose this answer it all oi these are correct 18. Covalent bonds? a) form only between non-identical atoms I u, b) involve the complete transfer of electrons from one atom to another ’0) involve the sharing of electrons between atoms d) a 8: c only are correct 9) none of the above is correct ‘ 19. Which of the following properties of water is likely properly matched with its correct definition? a) adhesion - the tendency of unlike molecules to repel each other ) cohesion - tendency of water molecules to hydrogen bond and attract each together 0) capillary action - the tendency of water to vaporize d) surface tension - the hydrogen bonding of water iJI ice e) choose this answer it not of these is correct 20. Proteins such as actin and myosin, which can readily change shape, are classified as? ‘ . a) enzymes b) structural proteins )contracttte proteins d) defensive proteins e) choose this answer if none of the above correct 21. Which of these is (arefltiajor unifying concept(s) of biology? a) that cells use the sam laws of bioenergetics to function as the laws of the physical universe b) the theory of evolution c) the Cell Theory I cl) all of these are unifying concepts a 22. The theory that life may have arisen by the seeding oi Earth via meteorite bombardment is often known by the name? a) Special Creation b) Evolution ,c) Pansperrnia d) non‘e of these 23. Under the current theories of chemical evolution, which came first protobionts or amino-acid monomers? ,8) amino acids came first b) protobionts came first c) neither is correct 24. A most likely source for the origins of the pro-biotic chemicals offlving systems is(was)? a) meteorites or comets b) hydrothermal vents c) abiotic chemical synthesis (ala Miller) Id) choose this answer it an! of these may have been likely to have been an origin 3. @. There are very unique and special laws of chemistry and physics. which are applicable only to living cells and no other forms of matter? a) true ID) false Bil 150 fall 2005 Test 1 — form 0 - page 1 ‘3? Amino acids such as SEFi and TH Fl, which can readily form hydrogen bonds with water molecules, without themselves ionizing, are best classified as? akacidic amino acids ‘bLbasic amino acids ’0) polar uncharged amino acids' d) aromatic amino acids e) none of these is correct 27. The 3-D shape that a molecules assumes due to its weak electrostatic interaction with other molecules in its environment is best describe as the molecules? /a) confonnation to) configuration 0) chirality d) none of these 28. Which of the following sequences is in the most likely correct order ofi Increasing complexity? a) organ --> cell --> organ system --> tissue f) atom --> macromolecule --> organelle --> cell 0) population --> ecosystem n) organism --> community d) cell --> chemical --> organism -- > tissue 'a 8) choose this answer if none of these is a correct sequence 29. A molecule is a group of atoms held together by energy in the form of? /a).chemicai bonds b) electrostatic repulsion c) enzymes d) none of these is correct 30. The chemical formula which lists only the elementai composition of a molecule is called its? a) empirical (moiecular) formula b) structural formula c) monosaccharide formula d) branched formula 8) choose this answer if none of these is correct 31. The hydrophobic portion of a triglyceride is at which end of a triglyceride (tatflipid)? f) fatty acid end b) glycerol end 0) phosphate end d) none of these is correct 32. A functional group [OH] can make a molecule containing it an alcohol. The group OH is known as? r) a hydroxyi group b) a carboxyl group 0) a methyl group d) a suifhydryi group e) choose this answer if none of these is c0rrect 33 From the list of proteins given below. pick the one that Is most likely a complex protein? a) albumins b) globulins c) histone3/d) nucleoproteins e) none of the above is correct 34-. Enzymes which possess different amino acids sequences but have the same catalytic function. especially when compared between different species are? (a) polymorphic b) invariant 0) site specific d) only simple proteins ue) none of these . Current predictions of the ‘Carrying Capacity’ of Earth have human populations reaching a maximum of about? a) 1 million b) 1 billion /) 10 billion a d) 100 billion e) none of these 36. Which of the following is a "greenhouse gas"? a) oxygen b) nitrogen /) methane d) argon e) choose this answer it all of the above are correct t 37 If you wanted to determine the mass or molecular weight of an isolated protein, which of the following techniques would be used best to determine its mass? a) differential centrifugation - b) ion exchange chromatography c) isoelectric focusing )) sodium dodecyl sulfate-polyacnrlamide gel electrophoresis e) none of these is correct 38. The class of biological molecules that ca)n bend the plane of polarized light in different directions are known as? a) structural isomer b)isotopes ) enantiomers d) cis-trans molecules e) none of these is correct / 39. The polymer made of glucose monomers units linked together by [51-4 glycosidic covalent bonds is? a) starch b) glycogen /) cellulose d) lysozyme - 9) none of these is correct Bil150-PT -- - .. , .. Nov 8, 2005 J f/SOM FORMO ”ff/L3, fay-.695?“ Test2 Multiple Choices: Directions: Pick the BEST answer from among those given. /- (arm + 01 The mechanism of action of an enzyme is due primarily to its ability to raise the energy of activation of the reactants? a) true A false 02 You have isolated a new protein from bacteria known to cause the disease tularemia. You hydrolyze the protein and analyze the components and find a-amino acids and guanine + cytosine. Most likely this protein is a(n)? a) albumin b) globulin c) histone fl nucleoprotein e) none of the above is correct 1- 03 Enzymes which possess different amino acids sequences, but have the same catalytic function, especially when compared between different species are known as being? /) polymorphic @ invariant e) site specific d) only simple proteins e) none of these 04. Zinc. an essential trace element. can be found bound to the active site of some enzymes. What wouid be the likely function of such zinc ions? e) coenzyme derived from a vitamin )__a oofactor Wot catalysis c) a substrate of the enzyme cl) an allosteric inhibitor of the enzyme e) none of these 14 Glucose 6 phosphatase The next 3 questions refer to the figure of the kinetics of the enzyme glucose-6- phosphatase mgfmin Glucose 0.002 0.5 0.6 0.8 2 4 B 16 24 48 50 micromoles G-B-Phosphate +Enz-A +Enz-B —0- Enz-c 05. Which 2 enzymes {of Enz-A, Enz-B, or Enz-C) have the same Km? a) Enz-A and Enz-B Enz—A and Enz-C c) Enz-B and Enz-C d) neither Enz-A, Enz-B. nor Enz~C h the same Km e) all 3 enzyme‘s (Enz-A, Enz-B, and Enz-C) have exactly the same Km value 06. What is the Vmax of enzyme—C? _ a} 2 mgimin glucose b) 6 mgimin glucose )8 mglmin glucose d) 8 micromoles G-6-phosphate é) none of these is correct 07. If the curve of Enz-B represents the inhibited kinetic curve of its native enzyme (Enz-A). what type of enzyme inhibition is being exhibited by Enz-B curve? ficompetitive b) non-competitive c) irreversible inhibition d) terminal inhibition e) none of these is correct may best conclude? enzyme was in a more active conformation at pH 6 08. in an enzyme experiment, chanfing the pH from Y to 6 resulted in an increase in product formation. We M‘enzyrnesoptimahpfimfi c) enzyme saturated at pH 6 diem.wmbést‘at’pbl"‘f e) none of these Bil 150 fall 2005 Test 2 — form 0 - page 2 09. Two twisted chains of actin monomers about 7-10 nm in diameter that are involved in muscle contraction, maintaining cell shape, pseudopod movement, and cytoplasmic streaming are known as? a) microtubules A microfilaments c) intermediate filaments d) collagen e) none of these is a correct or best choice 10. The substrate concentration at which the rate of an enzyme catalyzed reaction is one-half its maximal velocity is known as the enzyme’s Vmax? @ true ’) false _- 11. Class of enzymes that adds water across covalent bonds of molecules thereby breaking bonds is most likely a(n)? a) oxidreductase b) dehydrogenase c) transferase fl hydrolyase 9) none 1‘ these is correct 12. Which of the following is most likely to be the first to receive transport vesicles from the endoplasmic reticulum? icis Golgi b) medial Golgi c} trans Golgi d) centrosomes e) none of these is correct 1 . Bacterial cell ribosomes are the same structural size as ribosomes from? a) the eukaryotlc cytoplasm b) liver cells ”mitochondria & chloroplasts (:1) none of these is correct 14. A primary difference between Gram-positive and Gram-negative bacteria is the staining color of their respective bacterial cell walls in the presence of crystal violet, iodine, and saffarin. 6 true b) false h__ _.. . 15. Which of the following is NOT a prokaryote? _ a cyanobacteria b) Bacillus anthracis c) an E. coli 8 bacteriophage 3) choose this answer if all of these are prokaryotes 16. The electron micrograph shown to the right is most likely a? a) TEM (@SEM c) freeze-fracture EM d) none of these is correct 17. All of these will likely fit into one of the others. Which one can all of these fit into? a) a ribosome ’9 a mitochondria c) an HIV d} a myoglobin molecule e) water molecule 18. In the figure labeled “B” to the right, molecules are most likely communicating (moving) between the cells, through? - ("T-g.- —E* An '- gapjunctions b) tight junctions )plasmodssrna hi3” 4, if: shuttles e) none of these is rrect : 19. The cellular organelle whose prima function is lipid biosynthesis and drug detoxification is the? a) mitochondria b) lysosome fl smooth endoplasmic reticulum d) proteosomes e) none of these 20. A membrane bound sac found in cells which plays a role in maintaining water balance and collects cell wastes is? a) Golgi fl vacuole c) endodermis d) centriole e) none of these is a correct choice 21. Which of the following subcell parts most likely consists of mixture of collagen, proteoglycans, and fibronectins? a) cell membrane extracellular matrix c) polysaccharide cell wall d) plasmodesmata e) none of these is a correct or best choice the next 3 question deal with the idealized cell figure to the right. 22. The organelle seen at the label “C“ is most likely the? . a) endoplasmic reticulum b) lysosome Golgi apparatus d) microvilli 9) none of these is a correct or est choice 23. A Signal Recognition Particle {SRP} which helps target proteins after synthesis on ribosomes would most likely be found within? flit b) B c) C d) D e) none of these is a correct cytoskeletal network of the cell? a) true false 24. The idealized cell figure depicts what is often known afithe Bil 150 fall 2005 Test 2 — form 0 - page I 25. Where does substrate level phosphorylation occm in plant and animal cells? a) in cytoplasm only b) in mitoplasm only c) in chloroplasm only /) in both cytoplasm & mltopiasm 9 choose this answer if a, b. 8. c are correct 26. Which of the following membrane transport proteins involves active transport and requires ATP? a) ATP synthase ’9 H*-ATPase c) Glut-t d) a s b only e) a. b, a c 27. Cholesterol is found as a structural part of most cell phospholipid membranes in the region(s)? @ hydrophilic hydmhobic regions 0) only on the exterior side attached to collagen d) only on the cytoplasmi side attached to cytoskeletal proteins a) none of these is correct 28. In the figure to the right, which pattern (I, II, or III) most clearly demonstrates active transport? a) | b) II III d) none of these show faci itated diffusion H20 29. In the figure to the left. the solution surrounding this cell has a solute concentration that is than the concentration inside the cell? a) greater than less than \ c) exactly equal to d) choose this answer if none of these is correct /r 30. The figure to the right depicts signal transduction in cells. Which label is most likely the signal molecule? a b) b c) c d) e e choose this answer if none of these is correct 31. In the signal transduction figure to the right, which label most likely depicts a "(S-protein"? a) a b) b @c d) e 8) choose this answer if none of these is correct 32. Of the following reaction types the one that does NOT occur directly during Krebs Cycle is? “m u ‘ l 1/ \i a} decarboxyiation b) reduction c) oxidation C 1 A5 / i \ substrate level phosphoryiation f choose this answer if all of the above do occur directly during Krebs Cycle 33. A molecule of ADP is structurally part of which of the following coenzymes of cellular respiration? a} coenzyme-A Q NADH c) FAD d) NADF moose this answer if it part of all whose 34. ATP is a molecular product of which of the following metabolic processes? .glycolysis b) Krebs cycle c) pyruvate dehydrogenase f ontya and b e) a, b, and c 35. H+ ions accumulate in response to electron transfer in cell respiration within which of the following? F " I'I @ mitoplasm b) chloroplasm c) locule /) pert~mitochondrial space e) none of these'~ 1"; 36. If the AG for ATP ---> ADP + P is -7.3 Kcl'mole & the AG for conversion of pyruvate + ammonia ---> leucine “i“ ‘ is +3.4chmole, then the overall AG for the conversion of pyruvate + ATP + ammonia to leucine is? h’ ' a) 40.? chmole b) +3.9 Kctmole 9-3.9chmole d) +10.7Kcrmole 8) none of these 3?. The terminal electron acceptor (last molecule to accept electrons) of the electron transfer chain in mitochondria is? a) NADl-t I) oxygen c) P700 @ cytochrome-D 9) none of these is correct Bil 150 fall 2005 Test 2 _ form 0 - page 4 38. The Human species contains 46 chromosome? fi true b) false 39. In the figure to the right, what does label "B” identify '? Intermernbrane 3' "'“s a) ATP req'“ ions 0) ATP synthase svm ‘ d) pyruvate deh drogenase e) none of these is correct 40. What best describes “A" to be in the figure to the right? ATP synthase b) pyruvate dehydrogenase c electron transfer chain d) RuBP carboxylase ------------------ 3) none of these is a correct choice B -C 41. In the figure to the left, . , . W" where does lactic acid fermentation most likely occur? : $33? - within “A" ) in the area "B" ® * c) in the area labeled "D" in the area labeled "X" e) none of the above is a correct choice x 42. In the figure to the left. the proteins of the electron transfer chain are located? a) in the area "B" b) in area “D" in area “X" within membranes of “A” e) choose this answer if none of these is correct 43. The production of ATP without the concomitant production of NADPH is likely to occur in which of the following photosynthetic processes? a) non-cyclic electron flow fl cyclic electron flow c) neither of these is correct 44. One of the enzymes of CO; reduction in photosynthesis, PEP carboxylase. is found in which of the following? fi C3 plants b) C4 plants c) CAM plants at) b and c only a) all (a, b. and c) of these 45. In photosynthesis. t e reaction center molecule P330 is part of which of the following photosystem(s)? a) photosystem I Photosystem II c) Calvin cycle d) inter—cristae membranes e) none of these is correct 46. During photosynthesis H’ ions accumulate where inside the chloroplast? a) in the space between the inner and outer membranes (perichloroplast space) ’b) interior in a thylakold disk © in the chloroplasm 01) outside the chloroplast (in cytoplasm of cell) 9) none of these is a correct or best choice 47. A graphical plot of the physiological activity of a cellular process vs. the wavelengths electromagnetic energy possibly involved in such a process is known as a(n)? ’9 absorption spectra b) standard curve c) pulse-chase spectrum faction spectra e) choose this answer if none of these is a correct or best choice answer 48. In the figure of chromosomes to the right, the la...
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