Sample Test 1

Sample Test 1 - Biology 101 Test I- DeSaix February 4, 2010...

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Biology 101 –– Test I- DeSaix February 4, 2010 Name_____________________________ Print your name, last name first, and your PID number legibly on your answer sheet. Each answer is worth 2 points. Always choose one best answer and use only number 2 pencils to fill in your answers. Be sure to sign the pledge on your answer sheet. The last question will be used only if another question has to be deleted. Turn in your answer sheet in alphabetical order at the front of the room. Write down your answers on this copy to check against the key so that you will know what you have missed. The key will be posted on the blackboard website. 4 ____1. About 12 to 24 hours after the last meal, a person’s blood sugar level normally varies from 60 to 90 milligrams per 100 milliliters of blood, although it may rise to 130 mg per100 ml after meals high in carbohydrates. That the blood sugar level is maintained within a fairly narrow range, despite uneven intake of sugar, is due to the body’s ability to carry out 1) adaptation 2) homeostasis 3) inheritance 4) metabolism 5) all of these. 4 ____2. The principal point of the Darwinian theory of evolution by natural selection was that: 1) Long- term heritable changes in organisms are caused by use and disuse. 2) Those mutations that adapt an organism to a given environment somehow always arise in the greatest frequency in the organisms that occupy that environment. 3) Mutations are caused by all sorts of environmental influences. 4) Survival of characteristics in a population depends on competition between organisms, especially between members of the same species. 5) All of these. 5 ____3. Of the following, which is the testable answer to a question? 1) principle 2) law 3) theory 4) fact 5) hypothesis 2 ____4. Cell membranes are characterized by the presence of: 1) triglycerides 2) phospholipids 3) unsaturated fats 4) steroid hormones 5) fatty acids. 1 ____5. What kind of bond exists between two amino acids in a protein? 1) peptide 2) ionic 3) hydrogen 4) amino 5) sulfhydroxyl. 5 ____6. Enzymatic reactions can be affected by: 1) pH 2) salinity 3) temperature 4) cofactors 5) all of these. 4 ____7. Which of the following is NOT true of enzyme behavior? 1) Enzyme shape may change during catalysis. 2) The active site of an enzyme orients its substrate molecules, thereby promoting interaction of their reactive parts. 3) All enzymes have an active site where substrates are temporarily bound. 4) Each enzyme can catalyze a wide variety of different reactions. 5) None of these are true. 4 ____8. The sodium–potassium pump is an example of: 1) simple diffusion 2) facilitated diffusion 3) osmosis 4) active transport 5) passive transport. 5 _____9. Which affects the rate of diffusion through a semipermeable membrane? I. steeper concentration gradients II. higher temperatures III. size of the molecule diffusing 1) I only 2) II only 3) I and II 4) II and III 5) I, II, and III .
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Sample Test 1 - Biology 101 Test I- DeSaix February 4, 2010...

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