* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download BIO 101 Exam 2 practice questions Practice questions Ch 8,9 YOU
Survey
Document related concepts
Mitochondrion wikipedia , lookup
Amino acid synthesis wikipedia , lookup
Enzyme inhibitor wikipedia , lookup
Electron transport chain wikipedia , lookup
Metalloprotein wikipedia , lookup
Basal metabolic rate wikipedia , lookup
Photosynthesis wikipedia , lookup
Microbial metabolism wikipedia , lookup
Biosynthesis wikipedia , lookup
NADH:ubiquinone oxidoreductase (H+-translocating) wikipedia , lookup
Light-dependent reactions wikipedia , lookup
Evolution of metal ions in biological systems wikipedia , lookup
Adenosine triphosphate wikipedia , lookup
Citric acid cycle wikipedia , lookup
Photosynthetic reaction centre wikipedia , lookup
Transcript
BIO 101 Exam 2 practice questions Practice questions Ch 8,9 YOU MUST STUDY ] NOTES AND TEXTBOOK BEFORE ATTEMPTING THESE 1. Choose the pair that completes this sentence: Catabolism is to anabolism as ___ is to __ a. Exergonic: spontaneous b. Exergonic: endergonic c. Heat: entropy d. First law of thermodynamics: second law 2. Most cells cannot harness heat to perform work because a. b. c. d. Cells do not have much heat, they are relatively cool Heat can never be used to do work Heat must remain constant during work Temperature is usually uniform throughout a cell 30. 3. Which of the following metabolic processes can occur without a net influx of energy? a. b. c. d. ADP + → ATP + H2O C6H12O6 + 6 O2 → 6 CO2 + 6 H2O 6 CO2 + 6 H2O → C6H12O6 + 6 O2 amino acids → protein 4. If an enzyme in solution is saturated with substrate, the most effective way to obtain a faster yield of products is to a. add more enzyme. b. heat the solution to 90°C. c. add more substrate. d. add a noncompetitive inhibitor. 5. Some bacteria are metabolically active in hot springs because a. they are able to maintain a lower internal temperature. b. high temperatures make catalysis unnecessary. c. their enzymes have high optimal temperatures d. their enzymes are insensitive to temperature 6. Using a series of arrows, draw the branched metabolic reaction pathway described by the following statements, and then answer the question at the end. Use red arrows and minus signs to indicate inhibition. L can form either M or N. M can form O. O can form either P or R. P can form Q. R can form S. O inhibits the reaction of L to form M. Q inhibits the reaction of O to form P. S inhibits the reaction of O to form R. Which reaction(s) would prevail if both Q and S were present in the cell in high concentrations? a. L M b. M O c. L N d. O P e. R S BIO 101 Exam 2 practice questions Examine the following reaction, and then answer the questions below: catecholase catechol + oxygen (O2)---------------> polyphenol 12. The enzyme in this reaction is... a. catechol b. oxygen c. catecholase d. polyphenol 13. . The product in this reaction is... a. catechol b. oxygen c. catecholase d. polyphenol 14. The substrate in this reaction is... a. catechol b. catecholase c. polyphenol d. ATP 15. An enzyme is made of: a. carbohydrate b. protein c. nucleic acid d. lipid 16. Competitive inhibitors stop an enzyme from working by… a. changing the shape of the enzyme b. merging with the substrate instead c. blocking the active site of the enzyme d. combining with the product of the reaction 17. When a molecule binds to an area of an enzyme that is not the active site, and changes the shape of the enzyme so that it no longer can work, this is called... a. denaturation b. competitive inhibition c. noncompetitive inhibition d. substrate delocation 18. In an enzymatic reaction, the amount of _____ determines the amount of product produced. a. catalyst b. reactant c. oxygen d. enzyme e. water 19. The name of an enzyme usually ends in: a. -ing b. -and c. -ase d. –eme BIO 101 Exam 2 practice questions 20. When a molecule other than the substrate binds to the active site of an enzyme, this is. a. denaturation b. competitive inhibition c. noncompetitive inhibition d. substrate delocation 21. An enzyme: a. is a substrate b. is catalyst is used up in a reaction c. none of the above 22. To overcome an energy barrier between reactants and products, energy must be provided to get the reaction started. This energy, which is recovered as the reaction proceeds, is called: a. activation energy b. initiation energy c. reaction energy d. kinetic energy 23. Exergonic reactions: a. b. c. d. release energy are spontaneous reactions can be coupled to energonic reactions All statements are true 24. Enzymes: can bind metal ions that participate in reactions. A. have defined structures. B. bind their substrates at active sites. C. all statements are true. D. 25. A(n) _______ reaction releases energy. Energy must be added for a(n) _______ reaction to proceed. a. enzyme catalyzed, non-spontaneous b. exergonic, endergonic c. endergonic, spontaneous d. catalytic, non-catalytic 26. Consider the reaction: Glucose + ATP Glucose-6-phosphate + ADP Δ G is + 12.6 kJ/mol. a. The reaction is endergonic and thus makes free energy available to fuel life processes b. The reaction requires free energy and thus is endergonic c. This is an exergonic reaction which is spontaneous and makes energy available d. The reaction requires free energy and is exergonic 27. Glycolysis leads to production of ___ and 2 ATP. In the absence of oxygen, fermentation leads to production of ___. Glycolysis plus citric acid cycle can convert the carbons of glucose to ___, storing energy as ATP, _____ and __. lactic acid, pyruvate, CO2, NADH, FADH2 A. B. pyruvate, lactic acid, CO2, NADH, FADH2 C. CO2, NADH, FADH2, lactic acid, pyruvate D. O2, lactic acid, pyruvate, FADH2 E. glucose, lactic acid, CO2, NADH, FADH2 BIO 101 Exam 2 practice questions 28. At the end of glycolysis, each molecule of glucose has yielded 2 molecules of _______, 2 molecules of ________, and a net of 2 molecules of _________. A. B. C. D. E. FAD; NAD+; ADP CO2; NAD+; ADP lactic acid; ethanol; CO2 pyruvate, NADH, ATP H2O; CO2; ATP 29. The electron transport chain is located predominantly in the: i. Outer membrane of the mitochondria ii. Intermembrane space of the mitochondria iii. Inner membrane of the mitochondria iv. Matrix of the mitochondria v. Cytoplasm of the cell 30. The terminal electron acceptor during mitochondrial respiration: A. B. H20 NADH D. E. ATP O2 31. ATP synthase can produce ATP using as a direct energy source: a. energy from the conversion of glucose to pyruvate b. energy from the oxidation of pyruvate producing CO2 and H20 c. energy from a proton (H+) gradient established in mitochondria d. energy derived from the breakdown of NADH and FADH2 32. Place in 3 groups to represent the steps of cellular respiration. A few may be placed in more than one Group Glycolysis 2 Pyruvate Acetyl CoA Carbon dioxide released Oxygen used Electron transport ATP synthase Mitochondrial matrix Citric acid cycle H+ ion gradient CO2 release Glucose NADH produced NADH and FADH2 donate electrons Anaerobic 2 ATP yield per molecule glucose 34 ATP yield per molecule glucose ADP ATP Energy investment phase 1 ATP per turn of cycle Oxidative phosphorylation 10 controlled steps Mitochondrial inner membrane Cytoplasm