PracticeExam1_sp10

PracticeExam1_sp10 - PracticeExamQuestion Use the figure...

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Practice Exam Question Use the figure shown below to answer the following four questions 1. The structure labeled “A” is a(n): a. integrin b. transmembrane protein c. fibronectin d. both answers a and b are correct 2. The structure labeled “H” indicates the: a. hydrophobic portion of the cell membrane b. fatty acid tails of the phospholipid bilayer c. hydrophilic portion of the cell membrane d. both answers a and b are correct 3. The structure labeled “E” is part of the: a. collagen matrix b. cytoskeleton c. proteoglycan complex d. none of the above 4. The structure labeled “D”: a. is an adhesive structure that connects to the extracellular membrane b. is called fibronectin c. attaches the extracellular membrane to integrins d. all of the above 5. Testosterone is secreted by the testis and travels through the blood to enter cells throughout the body. The cytosol of target cells contains receptor molecules that bind testosterone, activating the receptor. These activated proteins enter the nucleus and turn on specific genes that control male sex characteristics. This is an example of signaling through a(n): a. Intracellular receptor b. Surface receptor c. Autocrine pathway d. Paracrine pathway 6. Which intercellular junction allows animal cells to directly communicate with each other? a. Anchoring junction b. Tight junction c. Gap junction d. Plasmodesmata 1 A B C D E F H G
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Practice Exam Question 7. What is the molecule illustrated below? a. A saturated fatty acid b. An unsaturated fatty acid c. A polyunsaturated triacylglyceride d. A steroid similar to cholesterol 8. Which statements about ATP are correct? a. ATP serves as a main energy source inside cells. b. The reaction ATP –> ADP + P is coupled to endergonic reactions in cells. c. The reaction ATP –> ADP + P is an exergonic reaction. d. All of the above. 9. In endergonic reactions: a. a net input of energy is required b. energy is released c. a net input of energy is not required d. heat is transferred from an area of low heat to an area of high heat 10. In the figure below, you see the normal scenario of an enzymatic reaction (I). The second scenario (II) depicts which type of inhibition? a. Competitive b. Non-competitive c. Cofacilitated d. Positive feedback 11. Certain microorganisms have a high percentage of unsaturated fatty acids in their membrane. Because of this, these organisms: a. are able to withstand high temperatures because their membranes are firmer. b. are more rapidly recognized and destroyed by cells of the immune system. c. are able to withstand low temperatures because their membranes do not solidify as rapidly. d. Answers b and d are both correct. 12. Which molecule is oxidized in the following chemical reaction? CH
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PracticeExam1_sp10 - PracticeExamQuestion Use the figure...

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