Exam 1, BIO201B, 2005 Form BYou must put your name and student number on the answer sheet and fill in the appropriate bubbles in pencil. There is only one right answer for each question.1. Which of the following was not a type of amino acid side chain described in BIO201B?A. Fully charged at pH=7.0B. Non-polar at pH=7.0C. Uncharged but still polar at pH=7.0D. Positively charged at pH=7.0E. Protonated at high pH but unprotonated at low pH2. Which of the following is true:A. Some small, unicellular plants are prokaryotic B. Since chloroplasts are prokaryotic and have their own DNA, they can easily live outside of plant cell on their ownC. Photosynthetic bacteria have chloroplasts inside themD. For some kinds of bacteria, photosynthesis can happen in vitro but not in vivoE. Plants are eukaryotic cells that can have both mitochondria and chloroplasts inside them.3. If a type of bacteria was 1.0 micron long, what is the highest number of these bacteria that could fit end-to-end inside a cell which is 20.0 x 10-5m long?A. 2.0 x 103B. 20C. 200D. 1000E. 504. Phospholipids are necessary structural components of membranes but high concentrations of free fatty acids can destroy membranes because:A. Phospholipids are amphipathic but free fatty acids cannot be amphipathicB. At the pH where free fatty acids are ionized, they can be detergents but phospholipids are not detergentsC. Free fatty acids can be polyunsaturated, making the membrane too fluid, but phospholipids are always saturated.D. While phospholipids can form bilayers, free fatty acids only form triglycerides and triglycerides are not structural components of membranesE. Phospholipids can form micelles but free fatty acids can’t5. The maximum number of cations that can be generated by the ionization of 2.0 moles of NaCl in pure water is:A. 1.0 mole B. 2.0mMC. 4.0 molesD. 4.0mM1E. 2.0 moles6. The pathway for electron transport in mitochondria goes from:A. Water to a protein complex to a hydrophobic protein to another protein complex to a peripheral protein (facing the matrix) to another protein complexthen finally to oxygenB. The TCA cycle to a protein complex to a lipid to another protein complex to a peripheral protein (facing the matrix) to another protein complex then finally towater C. NADH to a protein complex to a hydrophobic protein to another protein complex to a peripheral protein (facing the intermembrane space) to another protein complex then finally to oxygenD. NADH to a protein complex to a lipid to another protein complex to a peripheral protein (facing the intermembrane space) to another protein complex then finally to oxygenE. The matrix to a protein complex to a hydrophobic protein to another protein complex to a peripheral protein (facing the matrix) to another protein complexthen finally to oxygen7. Which of the following are all products of the light reactions of photosynthesis?A. Carbohydrates and oxygenB. Protons, electrons, NADPH and ATPC. Protons, electrons, water and ATPD. Carbon dioxide, ATP and NADP+E. ATP, NADH and oxygen8. During normal mitochondrial electron transport, protons (H+) are transported from__________________ and during mitochodrial ATP synthesis the protons go from__________________. A. Intermembrane space to matrix intermembrane space to matrixB. Matrix to intermembrane space intermembrane space to matrixC. Matrix to cytoplasm cytoplasm to intermembrane spaceD. Matrix to intermembrane space matrix to intermembrane spaceE. Cytoplasm to intermembrane space intermembrane space to matrix9. In a typical absorbance spectrum, like the one I showed in BIO201B:A. Absorbance is on the x-axis and the energy of light is on the y-axisB. Light energy is on the x-axis and wavelength (in nm) is on the y-axisC. Wavelength (in nm) is on the x-axis and absorbance is on the y-axisD. Photochemical efficiency is on the x-axis and wavelength is on the y-axisE. Absorbance is in the x-axis and wavelength (in nm) is on the y-axis10. In the Frye-Edidin experiments where human and mouse cells were fused, the most lateral diffusion of proteins was seen at which of the following temperatures? Why?A. 4oC because that’s where the most mixing of proteins was seenB. 18oC because that was the PTTC. 21oC (room temperature) because that’s the temperature at which the cells were grownD. Lateral diffusion was the same at all of the temperatures tested. That’s what proved the fluid mosaic modelE. 35oC because that’s where the membrane was most fluid211. In both mitochondria and chloroplasts the pathway for electron transport goes from (from what it starts with to what it ends with):A. A compound with a high reduction potential to one with a lower reduction potentialB. Water to oxygenC. A strong reducing agent to a strong oxidizing agent D. A compound inside the innermost membrane to one in the cytoplasm E. A protonated compound to an uncharged compound 12. From what we discussed in BIO201B, which of the following describes a hydrophobicaggregation most accurately?A. When non-polar molecules are forced into aggregates, it maximizes their exposure to the surrounding water moleculesB. In order to form a hydrophobic aggregate, the compound must be charged at one end and non-polar at the otherC. There are no non-covalent bonds between compounds in a hydrophobic aggregation, not even Van der Waals. All the bonds are covalent.D. The major force causing non-polar compounds to aggregate in water is hydrogen bonding of their fatty acid side chainsE. Water can hydrogen bond to other water molecules more readily when hydrophobic compounds aggregate in water than when those hydrophobic compounds are dispersed in water13. If a pure water solution (under standard conditions) contains 100.0 x 10-6M HCl and that HCl is fully dissociated, what is the pH?A. 6.0B. 6.2C. 4.0D. 8.0E. 2.614. The DNA of a mitochondria is:A. In the matrixB. In its nucleusC. In the inner membrane spaceD. Nowhere. Mitochondria don’t have DNA because they don’t need it.E. Inside the grana15. The main point of the Gorter and Grendel experiments with red blood cells (RBCs) in1925 was:A. To show that all membrane components spontaneously form bilayers when spread out over water in a specially designed troughB. To show that some of the lipids can be extracted from RBCs with hexane but not all of themC. To prove that mathematical estimations of RBC surface areas can accurately represent the protein to lipid ratios of membranesD. To determine