50 question for Principles Of Biology with answer key | BIOS 1120, Exams of Biology

Download 50 question for Principles Of Biology with answer key | BIOS 1120 and more Exams Biology in PDF only on Docsity! YY FORM A BIOS 1120 Test3 December 6, 2011 (2 pm Section) Be sure to fill in each answer on the Scantron form with a #2 pencil - ink will not work. You must turn in BOTH the Scantron and the test itself, with your name clearly indicated on BOTH. Be sure to bubble-in the circles for all of the following on your Scantron: your Name and WIN number, and the exam FORM (A, B, C, or D listed above; on the Scantron, this goes in the "Form" column located just left of the "Identifying number"). If any of this information is missing, your test score may be unavailable or significantly delayed. You are free to write notes on the test pages, and it is recommended that you mark your answers here for future reference, or in casc of problems with the Scantron. Tests (but not Scantrons) may be retrieved during office hours once grading has been completed. Please present your ID to the instructor or proctor when handing in the test and form. Choose the one best answer to each question. 1. Have you read all of the instructions above and, in response, written your name on this page, AND entered and led in your Name, WIN (your WIN, NOT your SS#), and the exam FORM (. C a. YES) b. No (Hint: make sure you can honestly answer “A”, and then do so) above) on the Scantron? 2. Which of the following is NOT onc of the fourteen most abundant elements in your body? 2.-bydrogen y c. carbon d. potassium e. phosphorous . Fach of the following atoms is present in your body. Which of these is MOST likely to be covalently-bonded to { other atom(s), and therefore be present as part of a MOLECU LE LE (as opposed to forming an atomic fon)? \ Sega / n imbalance between protons and electrons. An imbalance between protons and neutrons. Sa ‘More neutrons than protons. \ ~ dTewer neutrons than protons fg The same number of neutrons as electrons. 5, The nucleus of an atom ~ a. always includes one or more protons b. almost always includes neutrons much smaller than the nucleus of a cell ‘< Il of the above "pe none of the above T or F: For problems 6 and 7, determine whether the statement is Irue (A) or False (B). x 6. The chemical elements carbon, sodium, calcium, nitrogen and fluorine are symbolized by the letters C, S, K, __ NiandTe, respectively. C Wo So NS A7 7. The energy density (Calories per gram) of triglycerides is more than twice that of carbohydrates. ate Matching. For problems 8-12 match the description to the one best choice (A-E) below: A. Villi and microvilli B. Buffers 2. Neutrons D, Protons (a.k.a. H’ ions) E. Electrons an 8. Covalent bonds result when these are shared. E 9. When the concentration of these increases, the pII of a solution decreases. > 10. Radioisotopes are unstable because they have either too many or tao few of these. Cc 11. These are acid/base mixtures that help to maintain pH. & 12. These provide the surface area needed for efficient absorption. 13. Dehydration synthesis reactions are used to make: a. trighycerides. C b, nucleic acids. \~ — ¢. polysaccharides. d. polypeptides (proteins). ~er all of the above—_ 14. In general, which type of biological molecule is the most kydri enucleic acids B-complex vitamins \ ARatbobyirates <a. > ECan Si aay, because it depends on whether the molecule comes from a plant or an animal. 15. Which of the following is NOT a type of lipid? a. a wax b. a triglyceride V 16. Which two molecules are both classified as disaccharides? ) A glucose and glycogen wone é— “() sucrose (a.k.a. table sugar) and lactose getollagen and keratin Y\-| ~ deTibose and deoxyribose OT “gesstrogen and testosterone See 17. Which of the following clements readily loses an electron, and thereby forms a stable atomic ION (with a complete outer shell) that has a net POSITIVE (+1) charge? — X < A ‘Carbon (atomic number = 6) i \ ) UbNitrogen (atomic number = 7) {\ hie TV a Mer \ ic number = sa 4 T or F: For problems 18 and 19, determine whether each statement is True (A) or False (B). ae 18. The O-H bond found in water, carbohydrates, and various other molecules is POLAR because tncGectls involved are NOT shared equally between the two atoms. - 19. In humans, dietary cellulase is rapidly broken down (hydrolyzed) into galactose and fructose by a salivary « enzyme called amylase, which also breaks down dietary proteins. : -2-