mcb32-fa10-mt1-Machen, Lew, Wurmser-exam

mcb32-fa10-mt1-Machen, Lew, Wurmser-exam - MCB3210F EXAM 1A...

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1 MCB3210F NAME _____________________ EXAM 1A SECTION __________________ CELLS, TISSUES, ORGANS, FLUIDS AND HOMEOSTASIS 1. Organs like the brain are defined as ________. A) a collection of cells that perform similar functions B) a collection of cells that function independently of one another C) a combination of two or more tissues that operate together to perform a specific function D) a collection of tissues that function independently of one another C 2. T-F? Interstitial fluid and plasma are both extracellular fluids. T 3. Which of the following is an example of positive feedback? A) Blood glucose concentration increases following a meal, and this triggers insulin release from the pancreas to stimulate glucose uptake into muscle and liver cells. B) In an a nerve, depolarization increases Na + permeability, which depolarizes the cell C) In an a nerve, depolarization increases K + permeability, which hyperpolarizes the cell D) Exercise increases CO 2 production and breathing rate. E) All of the above are examples of positive feedback B MOLECULES 4. Solution A has pH 3 while solution B has pH 8. Which of the following statements is true? A) Solution A is basic. B) Solution B is acidic. C) [H + ] of solution A is higher than [H + ] of solution B. D) A-C are all true E) A-C are all false. C 5. T-F? Digestion of proteins occurs by dehydration synthesis and yields amino acids and water. F 6. T-F? The C-C bonds in lipids are polar, covalent bonds. F 7. What type of molecule is shown in the figure? A) monosaccharide B) disaccharide C) fatty acid D) phospholipid E) peptide B 8. ________ are molecules composed of glycerol and three fatty acids. A) Phospholipids B) Saturated fatty acids C) Membrane bilayers D) Steroids E) Triglycerides E 9. T-F? Hydrogen bonds are important determinants of surface tension of water and also of secondary and tertiary structures of proteins. T
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2 CELL ORGANELLES 10. Which of the following is found in plasma membranes? A) proteins B) cholesterol C) carbohydrates D) phospholipids E) all of the above E 11. The organelle responsible for packaging vesicles for secretion is A) mitochondrion B) Golgi C) the agranular endoplasmic reticulum D) granular endoplasmic reticulum B 12. What organelle contains digestive enzymes? A) rough endoplasmic reticulum B) Golgi apparatus C) lysosomes D) nucleus E) mitochondria C ENZYMES 13. T-F? For the reaction between CO 2 and H 2 O, the law of mass action states that increases in CO 2 concentration will cause a reduction of pH of the solution: CO 2 +H 2 O H 2 CO 3 H + + HCO 3 - T 14. T-F? Energy and heat are released in the reaction ATP ADP + P i . T 15. T-F? Enzymes of glycolysis are continuously consumed and resynthesized in the cytosol. F
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mcb32-fa10-mt1-Machen, Lew, Wurmser-exam - MCB3210F EXAM 1A...

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