gen bio test 2 test review

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Southern Adventist University *

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151

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Biology

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Apr 3, 2024

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docx

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GENERAL BIOLOGY 8am OPPORTUNITY #1 09-10-2021 Name_______________________ Questions are 1 point each unless otherwise indicated. MULTIPLE CHOICE--Choose the letter of the ONE BEST ANSWER. 1. The best experimental design _____. A. includes a large sample size for each condition B. includes a control C. alters only one condition between the controls and the experimental condition D. includes a large sample size and a control, and alters only one condition between the controls and the experimental condition 2. Which of the following types of cells utilize deoxyribonucleic acid (DNA) as their genetic material but do not have their DNA protected within a nuclear envelope? A. animal B. plant C. archaean D. fungi E. protistan 3. Which of the following is a taxonomic level which includes more organisms than a species but includes fewer organisms than an order? A. family B. domain C. domain D. phylum E. population 4. A friend of yours calls to say that his car would not start this morning . He asks for your help. You say that you think the battery must be dead. If so, then jump-starting the car from a good battery will solve the problem. In doing so, you are _____. A. testing a theory for why the car will not start B. making observations to inspire a theory for why the car will not start C. stating a hypothesis and using that hypothesis to make a testable prediction D. comparing multiple hypotheses for why the car will not start E. consoling your friend who is worried he might have to purchase an expensive new starter and pay to have it installed as well. 5. All the organisms on the serene SAU campus make up A. a taxonomic domain B. an ecosystem C. a population D. a diverse phylum E. a community 6. You are asked to indicate the type and number of atoms in a molecule. Which representation would work best? A. molecular formula B. structural formula C. ball-and-stick model D. space-filling model 7. Which of the following is broken when water evaporates? A. nonpolar covalent bonds B. ionic bonds C. hydrogen bonds D. polar covalent bonds 8. A covalent bond is likely to be polar when ________. A. one of the atoms sharing electrons is more electronegative than the other atom B. the two atoms sharing electrons are equally electronegative C. carbon is one of the two atoms sharing electrons D. the two atoms sharing electrons are of the same elements E. carbon is one of the two atoms sharing electrons & the two atoms sharing electrons are equally electronegative 9. How many electron pairs are shared between carbon atoms in a molecule that has the formula C 2 H 4 ? A. one B. two C. three D. four E. six 10. How much more basic is a solution with a pH of 5 than one with a pH of 2? A. 10,000 times B. 30 times C. 1000 times D. 100 times E. 3 times
11. Nitrogen is more electronegative than hydrogen. Which of the following is a correct statement about the atoms in ammonia (NH 3 )? A. Each hydrogen atom has a partial positive charge; the nitrogen atom has a partial negative charge. B. Ammonia has an overall positive charge. C. Ammonia has an overall negative charge. D. The nitrogen atom has a partial positive charge; each hydrogen atom has a partial negative charge. Refer to the following figure to answer the questions below. 12. How many electrons are present in a Phosphorus 3+ atom? A. 12 B. 16 C. 18 D. 28 E. 34 Use the following figure to answer the question: 13. Based on your knowledge of the polarity of water molecules, the solute molecule depicted in the center is most likely ____. A. positively charged B. negatively charged C. without charge D. nonpolar 14. The partial negative charge in a molecule of water occurs because ________. A. the oxygen atom donates an electron to each of the hydrogen atoms B. the shared electrons spend more time around the hydrogen than around the oxygen C. the shared electrons spend more time around the oxygen than around the hydrogen D. the oxygen atom has two pairs of electrons in its valence shell that are not neutralized by hydrogen atoms E. one of the hydrogen atoms donates an electron to the oxygen atom 15. Water molecules can form hydrogen bonds with ________. A. chloride ions D. oxygen gas molecules B. oils E. compounds that have polar covalent bonds C. sodium ions 16. The two molecules shown in the figure below are best described as _____. A. enantiomers B. radioactive isotopes C. structural isomers D. cis-trans isomers E. need more information to make this determination
17. Which of the following illustrations is NOT a structural isomer of an organic compound with the molecular formula C 6 H 14 ? For clarity, only the carbon skeletons are shown; hydrogen atoms that would be attached to the carbons have been omitted. A. C. B. D. 18. Which molecule shown to the right has a carbonyl functional group in the form of a ketone? 19. The element present in all organic molecules is ________. A. hydrogen B. oxygen C. carbon D. nitrogen 20. Research indicates that ibuprofen, a drug used to relieve inflammation and pain, is a mixture of two enantiomers; that is, molecules that ________. A. have identical chemical formulas but differ in the branching of their carbon skeletons B. differ in the arrangement of atoms around their double bonds C. differ in the location of their double bonds D. are mirror images of each other 21. Which molecule shown above has a functional group that can participate in a covalent bond in the tertiary structural level of a protein?
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