BIO EXAM 1 Answers STUDY GUIDE PDF

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Introduction to Biology- EXAM #1 Enter each answer in your clicker and circle it on the paper Choose the best answer for the following multiple choice questions 1. Organs are composed of tissues, which are composed of cells. This is an example of which characteristic of life? A.Living things grow and develop. B.Living things respond to stimuli. C.Living things maintain themselves by homeostasis. D.Living things have levels of hierarchical organization. 2. The smallest unit that has all of the characteristics of life is the: A.cell. B.tissue. C.organ. D.organ system. E.organism. 3. A fossil was once a living organism but its tissues have now been replaced by minerals and it no longer exhibits most properties of life, except for: A. organization B.homeostasis. C.growth&reproduction D.response to stimuli. 4. Outside, the non-living world is unorganized and chaotic while inside the cell or organism there is a relatively constant environment; maintaining this environment is a process of: A.behavior. B.thermodynamics. C.homeostasis D. metabolism. E. adaptation. 5. A kernel of corn contains an embryo plant that is capable of becoming a complex plant with roots, stalks, leaves and ears of corn. This potential reflects which property of life? A.growth & development B.response to stimuli C.adaptation D.homeostasis E.metabolism 6. Which level of biological organization is composed of tissues? A.organism B.organ system C.organ D.cell E.molecules 7. Which sequence correctly lists the different levels of biological organization? A.cells-organs-tissues-organ systems-organism B.cells-tissues-organ systems-organs-organism C.tissues-cells-organs-organ systems-organism D.tissues-organs-organ systems-organisms-cells E.cells-tissues-organs-organ systems-organisms 8. Which of the following is NOT true about DNA? A.has a double helix B.bases held together by hydrogen bonds C.bases are complementary to each other D.has a deoxyribose sugar E.contains adenine, guanine, cytosine, and uracil 9. All members of one species within a particular area form a: A.biosphere. B.ecosystem. C.population. D.nation. E.country. 10. All populations in one natural setting plus their physical environment constitutes a(n): A.biosphere. B.ecosystem. C.population. D.habitat. E.cohort. 11. When researchers test a new human cancer drug using mice, the mice used constitute the: A.hypothesis. B.data. C.experimental design. D.model. E.control. 12. Which of the following is not one of the six basic elements of living organisms? A.nitrogen B.oxygen C.chlorine D.hydrogen 13. The atoms contain: A.neutrons only B.electrons only. C.protons, neutrons, and electrons. D.protons&neutrons. 14. To measure the activity of the human brain, a RADIOACTIVE sugar is injected in the carotid artery and is utilized by those cells that are most active. This shows up on a PET scan and demonstrates the detection of: A. sulfur B.X-rays C.covalent bonds D.neutrons. E.isotopes. 15. Which of the following molecules is NOT a compound? A.water or H2O B.salt or NaCl C. Oxygen or O2D.glucose or C6H12O6 16. You can hold a water droplet between two fingertips held slightly apart. This is an example of what property? A.cohesion of water molecules from hydrogen bonding. B.dissociation of the ionic bonding of water. C.you are very strong D.vibrational movement of water molecules. 17. The water strider is an insect that skates across the water without sinking. The tips of its feet should be coated with molecules that repel the water or: A.ions B.hydrophilic C.hydrophobic D.isotopes E.acidic. 18. Since pure water is neutral, it contains: A.no hydrogen ions B.neither hydrogen nor hydroxide ions. C.equal number of hydrogen and hydroxide ions

19. If he pH of the saliva is slightly basic. Which of the following would therefore be an expected pH for saliva? A.6.4 B.4.6 C.1.7 D.7.4 20.The study of all living things is called: a.Biology b.ecology c.evolution d.genetics 21. The basic unit of matter is called: a.neutron b.proton c.atom d.electron 22. The cells keep a constant ph with the use of: a.acids b.bases c.buffers d.atoms 23. The ability to do work is a good indication of: a.enzymes b.energy c.atoms d. electrons 24. The most common elements in life are: a. O, C, H b. O, C, H, N c. C, H, P d. O, H, P, He 25. Organic biomolecules always: A. contain carbon B.contain nitrogen C.contain sulfur D. are found only in plants 26. Which is NOT a correct association of organic molecules? A. Starch and glycogen are carbs B.fatty acids full of hydrogens are unsaturated C.A protein is a polymer of amino acids. D.ATP is used for energy storage. 27. A genetic mutation can cause a change in the SEQUENCE of the 20 amino acids used to build proteins. Such a change is a change to the protein's structure: A.primary only B.secondary only C.tertiary only D.primary 28. Glycogen and cellulose are: A.monosaccharides used for quick energy. B.proteins found in cell membranes. C.polysaccharides used to store glucose/energy. D.fat found in butter E.nucleotides in the nucleus 29. Lactose and glucose are classified as: A.nucleic acids. B.fatty acids. C.proteins. D.carbohydrates. E.lipids. 30. All carbohydrate molecules have: A.amino acids. B.nitrogen&phosphate. C.organic acids. D.C & H only E.C, H, O 31. ____ is found in muscles and accounts for energy strength. A.Cellulose B.DNA C.Glycogen D.Phospholipid E.Cholesterol 32. A fat molecule formation requires both glycerol and: A.glycerol B.fatty acids. C.glucose D.glucose E.cholesterol 33. Nucleic acids are polymers of: A.amino acids. B.nucleotides. C.glycerol. D.monosaccharides. E.lipids 34. Which association is NOT correct? A.nucleic acid—genes B.carbohydrate—enzymes C.fats—storage energy D.proteins—transport of molecules 35. Antibodies and enzymes are organic compounds classified as: A.nucleic acids. B.carbohydrates. C.lipids. D.steroids. E.proteins. 36. The _____ structure of a protein consists of the SEQUENCE of amino acids joined together by polypeptide bonds. A.primary B.secondary C.tertiary D.quaternary E.molecular 37. If two amino acids are joined together, the resulting molecule is a(n): A.lipid. B.disaccharide. C.fatty acid. D.peptide. E.sucrose 38. The proposed cause of mad-cow disease and kuru in cannibals from New Guinea is a change in a brain protein. Disease victims appear to have a normal protein that should contain primarily coiled alpha helix changed conformation into a protein mainly made of beta sheets. This would constitute a change in the: A.linear sequence of the amino acids or its primary structure. B.secondary structure. C.tertiary structure. D.quaternary structure only E.protein into a nucleic acid. 39. Which of these combinations would be found in a nucleotide? A.base-acid B.adenine-thymine-uracil C.base-sugar-phosphate group D.DNA-RNA-nucleus 40. The backbone (sides of the ladder) of a nucleic acid is made by the repetition of: A.NCCN. B.R groups. C.bases. D.sugar-phosphate E.adenine

41. The final shape of a protein is very important to its function. When proteins undergo an irreversible change in shape called ________________ they ________________ perform their usual functions. A.naturation/can B.naturation/cannot C.denaturation/can D.denaturation/can’t e.none of them 42. Proteins are made from amino-acids which are connected together by: a.sugars b. bonds c. peptide bonds d. hydrogen bonds e.lipids 43. The main function/s of carbohydrates is/are: a.store genetic info b.catalysis c.structure d.structure & energy e.defense 44. Molecules such as cellulose formed from long chains of individual sugar molecules are called: a.proteins b.polysaccharides c.steroids d.lipids e.DNA 45. DNA is considered this type of compound: a. lipid b. protein c. carbohydrate d. no correct response 46. The shape of a protein affects what? a.volumen b.function c.color d.mass e.sides 47. All FOUR DNA nucleotides differ in the: a.sizes b.hydrogen bonds they form c.phosphate d.type of sugar e.base 48. Lipids are used for: a.motion and defense b.genetic storage c.energy storage d.enzymes e.none of them 49. Oils liquid at room temperature are________________ fatty acids. a. solid b.saturated c. cholesterol d.unsaturated e. none of them 50. Molecules such as glycogen formed from long chains of individual sugar molecules, are called: a. proteins b. polysaccharides c. steroids d. lipids e. none of them 51. The unique nucleotide present in the RNA but not in the DNA is: a. A b. T c. G d. U e. C 52. Which of the following is NOT a macromolecule used to build cells? a. crystals b. carbohydrates c. lipids d. proteins e. all of them 53. A complex carbohydrate from the followings is _____________. a. sucrose b. fructose c. glucose d. glycogen e. all of them 54. Fats are found solid at room temperature depending on the amount of _________ bound. a. nitrogens b. oxygens c. phosphates d. hydrogens e. carbons 55. Hemoglobin and antibodies are samples of: a. lipids b. proteins c. carbohydrates d. nucleic acids e.none of them 56. Which of the following have nitrogenous bases correctly paired in DNA? A.adenine—guanine; thymine—cytosine B.adenine—uracil; guanine—cytosine C.adenine—thymine; guanine—cytosine D.adenine—adenine; guanine—guanine 57. A nucleotide contains: A.DNA and RNA. B.a sugar and a phosphate. C.complementary purines and pyrimidines. D.RNA, protein, and lipids. E.a sugar, a phosphate, and a nitrogen base. 58. The hereditary material found in all cells is: A.DNA. B.rRNA. C.mRNA. D.tRNA. E.ATP....