Biology: Cellular Respiration and C. Chromatin B.

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Name: ________________________ Class: ___________________ Date: __________

ID: A

GENERAL BIOLOGY PRACTICE MIDTERM TEST 2010-2011
Multiple Choice: Identify the choice that completes the statement or answers the question. ____ 1. The work of scientists usually begins with a. testing a hypothesis. b. careful observations.

c. d.

creating experiments. drawing conclusions.

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2. What is the term for all parts of Earth inhabited by living things? a. population b. ecosystem c. biosphere d. environment 3. Which of the following are likely topics in a biology course? a. Why does the Texas horned lizard squirt blood out of its eyes? b. How is a banded pipefish able to hide in its environment of seaweeds? c. What chemicals cause plant stems to lengthen or flowers to bloom? d. All of these. 4. Living things do all of the following except a. make adjustments to nonliving factors around them. b. maintain a steady internal environment. c. respond to other organisms. d. pass an identical genetic code to their offspring for many generations. 5. Students in a biology class ran an experiment on a type of flowering plant. Their goal was to find the optimal time in the plant's life for flowering. What time period will provide the most flowering plants? Use Table 1-1 to determine your answer.

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Table 1-1 Day 2 4 6 8 10 a. b. 4 days 6 days Number of Plants Flowering 6 12 18 22 8 c. d. 8 days 10 days

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Name: ________________________ ____ 6. The three particles that make up atoms are a. protons, neutrons, and isotopes. b. neutrons, isotopes, and electrons.

ID: A

c. d.

positives, negatives, and electrons. protons, neutrons, and electrons. compound crystal

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7. Which term does NOT apply to sodium chloride? a. molecule c. b. ionic bonding d.

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8. In a water molecule, shared electrons spend more time around the oxygen atom than the hydrogen atoms. As a result, the oxygen atom is a. slightly negative. c. slightly positive. b. very negative. d. very positive. 9. Cougars are predators that often eat weakened or diseased animals. This is a description of the ____ of cougars. a. habitat c. niche b. community d. none of these

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Figure 2-1 ____ 10. Referring to Figure 2-1, the coyotes would be considered ____. a. herbivores c. autotroph b. carnivores d. decomposers ____ 11. The space surrounding the nucleus of an atom contains a. protons. b. electrons. c. neutrons. d. ions. ____ 12. If the pH of stomach acid and of oven cleaner (a base) were measured, a. both would be below 7. b. both would be above 7. c. the pH of stomach acid would be above 7, but the pH of oven cleaner would be below 7. d. the pH of stomach acid would be below 7, but the pH of oven cleaner would be above 7.

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Name: ________________________ ____ 13. Enzymes affect the reactions in living cells by lowering the a. active site energy of the reaction. b. speed of the reaction. c. temperature of the reaction. d. activation energy of the reaction.

ID: A

____ 14. The plasma membrane contains channels that help move materials from one side to the other. What are these channels made of? a. carbohydrates b. lipids c. nucleic acids d. proteins ____ 15. Which cell structure contains the cell’s genetic material? a. organelle b. nucleus c. cell envelope d. cytoplasm ____ 16. One isotope of carbon differs from another in which way? a. atomic number c. number of neutrons b. number of electrons d. number of protons ____ 17. Which is an example of a chemical reaction? a. ice melting b. iron rusting ____ 18. Which of the following contain a nucleus? a. prokaryotes b. bacteria c. d. c. d. sugar dissolving in water water evaporating eukaryotes organelles

____ 19. Which of the following is NOT found in the nucleus? a. cytoplasm c. chromatin b. nucleolus d. DNA ____ 20. Which of the following structures is found in the cytoplasm? a. nucleolus c. chromatin b. ribosome d. cell wall ____ 21. Which organelles help...
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