Biology 20Practice Exam 1

Biology 20Practice Exam 1 - Biology 20 Practice Exam 1...

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Page 1 of 4 Biology 20 Practice Exam 1 These questions include knowledge, comprehension and application of the material discussed in class. Some questions are more difficult than normal so that you will use your notes and textbook. Do your best. If you have questions, please do not hesitate to ask for assistance (Office SM 254 or email [email protected]). Good luck!!! This is by no means everything that will be on the test. I've tried to put some representative questions on this practice exam for you to work on. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1. What are the basic "building blocks" of DNA? a) four nucleotides b) protein c) 26 nucleotides d) carbohydrates and lipids e) 20 amino acids 2. What is a hypothesis? a) a fact b) a tentative explanation c) an untestable idea d) a verifiable observation e) the same thing as a theory 3. A controlled experiment is one in which a) there are at least two groups, one differing from the other by two or more variables. b) the experiment is repeated many times to ensure that the results are accurate. c) the experiment proceeds at a slow pace to guarantee that the scientist can carefully observe all reactions and process all experimental data. d) there are at least two groups, one of which does not receive the experimental treatment. e) there is one group for which the scientist controls all variables. 4. Which of these is an example of an organelle? a) digestive system b) amoeba c) muscle d) stomach e) chloroplast 5. Once labor begins in childbirth, contractions increase in intensity and frequency until delivery. Therefore, the increasing labor contractions of childbirth are an example of a) a feedforward mechanism. ) negative feedback. c) positive feedback. d) feedback inhibition. e) both C and D. 6. Species that are in the same __________ are more closely related than species that are only in the same _____. a) class . .. order b) phylum . .. class c) family . .. genus d) kingdom . .. phylum e) family . .. order 7. Which of these is the best description of the science of biology? a) the study of the way humans interact with their environment b) the study of life c) the study of biodiversity d) the study of humans e) the study of rocks 8. A maple leaf is at which level in the hierarchical organization of life? a) organelle b) organ c) tissue d) organism e) population 9. One of the key distinctions between prokaryotic and eukaryotic cells is the presence of __________ cells, which is lacking in __________ cells. a) DNA in eukaryotic . .. prokaryotic b) a nucleus in prokaryotic . .. eukaryotic c) a nucleus in eukaryotic . .. prokaryotic d) DNA in prokaryotic . .. eukaryotic e) a cytoplasmic organelle in prokaryotic . .. eukaryotic 10. Which four elements make up approximately 96% of living matter? a) carbon, sulfur, phosphorus, hydrogen
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This note was uploaded on 02/28/2010 for the course BIO 50050 taught by Professor Batterton during the Fall '09 term at University of Texas.

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Biology 20Practice Exam 1 - Biology 20 Practice Exam 1...

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