Toxic and irreversible 12 which of the following is

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toxic and irreversible 12. Which of the following is true of a 12 C molecule and a 14 C molecule? (A) They have a different number of electrons. (B) They have the same number of neutrons. (C) They have the same number of protons. (D) They have different kinds of atoms. (E) They have the same molecular weight. 13. A student looking through a compound light microscope correctly decides that she is observing a eukaryotic cell because (A) mitochondria are visible (D) a cell wall is present (B) vacuoles are present (E) it has flagella (C) chlorophyll is present 14. Which of the following organelles is involved in storage, modification, and packaging of secretory products produced by the ribosomes? (A) The lysosome (B) The mitochondrion (C) The endoplasmic reticulum (D) The Golgi apparatus (E) The nucleolus 15. A cell that lacks peroxisomes is unable to (A) provide enough energy to the cell (B) rid the cell of toxic substances (C) synthesize proteins in the cell (D) store organic molecules in the cell (E) phagocytocize foreign particles entering the cell 16. What is the function of centrioles? (A) They cause cytokinesis by the concentric shortening of microtubules. (B) They produce microtubules for the chromosomes to migrate along as they move to opposite poles of the cell. (C) They are required for DNA replication (D) They enable bacteria to move (E) None of the above 17. Alcohol is detoxified in (A) lysosomes (B) peroxisomes (C) rough endoplasmic reticulum (D) smooth endoplasmic reticulum (E) none of the above 18. Diffusion of material involves which of the following? (A) The movement of a substance up its concentration gradient. (B) The movement of water with the current. (C) The movement of a substance from a low concentration to a high concentration. (D) The movement of a substance from a high concentration to a low concentration. (E) The movement of material. 19. Sodium-potassium pumps in the cell membrane are examples of (A) antiports (D) cis- ports (B) symports (E) none of the above (C) uniports 20. Anaerobic respiration in fungi includes all of the following conversion pathways EXCEPT (A) ethanol to CO 2 (B) glucose to pyruvic acid (C) pyruvic acid to ethyl alcohol (D) pyruvic to lactic acid (E) NADH to NAD + 21. In anaerobic respiration, ATP is formed through (A) hydrolysis (B) enzyme-deficient anabolism (C) substrate-level phosphorylation (D) chemiosmosis (E) oxidative phosphorylation 22. Which of the following sugars is produced under anaerobic conditions? (A) Cellulose (D) Fructose (B) Glucose (E) Lactose (C) Glycogen 23. If 2 molecules of pyruvate are supplied to an aerobic eukaryotic cell in place of a glucose molecule, the net output of ATP after complete metabolism would be (A) 2 ATP (D) 36 ATP (B) 4 ATP (E) 38 ATP (C) 34 ATP 24. C 4 plants store CO 2 so that stomata stay open for less time. This is to prevent excess (A) adhesion (D) O 2 release (B) CO 2 intake (E) transpiration (C) evaporation AP Biology Sample Exam Page 2
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25. During cellular respiration, most ATP molecules are generated via (A) the Kreb's cycle and the electron transport chain (B) fermentation and the electron transport chain (C)
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