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BIOL 1000 test 1 Section A - version A -final.pdf

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BIOL 1000
Paula Wilson

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Biol1000 Fall 2012 – Test 1 BIOL 1000 3.0 Section A Test 1: Friday October 5, 2012 This ENTIRE test package and scantron MUST be submitted to receive a grade Your STUDENT NUMBER and NAME must be clearly indicated on this package and scantron sheet to receive a grade Your STUDENT NUMBER must also be BUBBLED CORRECTLY in the scantron sheet to receive a grade There are 25 Multiple Choice Questions (1 mark each). Choose the BEST answer for each question. ELECTRONIC AIDS (e.g. calculators, phones iPods etc.) are NOT PERMITTED. Invigilators will immediately RELOCATE anyone or SUSPEND the examination for any individual suspected of ACADEMIC DISHONESTY ONLY THE SCANTRON WILL BE GRADED SO MAKE SURE YOU FILL IN THE ANSWER TO EACH QUESTION ON THE SCANTRON BEFORE THE ALLOTTED TIME FOR THE TEST IS UP. YOU WILL NOT BE PROVIDED EXTRA TIME TO DO SO. HAND IN QUESTION BOOKLET WITH SCANTRON. If you finish the test before the allotted time then please raise your hand and an invigilator will come and collect your test GOOD LUCK! Section Last name: First name: Student number: A Page 1 of 7 Biol1000 Fall 2012 – Test 1 1.What is the difference between a pigment and a photoreceptor? A. There is no difference: all pigments are photoreceptors. B. Photoreceptors contain membrane; pigments do not. C. Photoreceptors contain protein; pigments do not. D. Photoreceptors are found only in prokaryotes; pigments are found in all domains. E. Pigments are found only in photosynthesizing organisms and photoreceptors are found only in animals. 2.Of the three different ways light can interact with matter, which is the most biologically relevant? A. Transmitted light. B. Transformed light. C. Absorbed light. D. Reflected light. 3.What is the difference between an eyespot and an eye? A. The only difference is size; an eyespot is a smaller version of an eye. B. An eyespot detects light but does not trigger a response; an eye does both. C. An eyespot contains photoreceptors; an eye does not. D. An eyespot detects light but does not generate an image; an eye does both. E. Eyes contain retinal; eyespots do not. 4.Which of the following is responsible for photomorphogenesis in plants? A. Chromatophore. B. Chlorophyl. C. Phytochrome. D. Rhodopsin. 5.Dr. Art E. Fact is studying a hormone that is linked to feeding behaviour in wild rats, and notices that the hormone levels go up and down on a 24 hour cycle, peaking between 10 am and 6 pm. He takes a group of the wild rats and keeps them in the lab for a week. He keeps half of them on a 24 hour light cycle and half on a 24 hour dark cycle. In the former case the hormone levels stay high all the time and in the latter case they drop low and stay low. What would be the best conclusion from this work? A. The high levels of hormone are triggered by high levels of melatonin. B. The gene responsible for making the hormone may be a clock gene. C. The hormone exhibits a circadian rhythm. D. Hormone release is triggered by light. E. All of the above conclusions fit the data equally well. Page 2 of 7 Biol1000 Fall 2012 – Test 1 6.Which of the following statements about DNA damage by ultraviolet (UV) light is true? A. The most common DNA damage due to UV light is the formation of dimers between adenine and guanine. B. Dimers disrupt the shape of the double helix. C. Thymine dimers form when cytosine is altered by UV light to form thymine, then linked covalently to an adjacent thymine. D. Dimer formation is especially serious because they cannot be repaired by the normal repair enzymes in the cell. 7.DNA is a double-stranded molecule. How are the adjacent nucleotides in a single strand of DNA joined together? A. Hydrogen bonds between adenine and thymine and cytosine and guanine. B. Hydrogen bonds between deoxyribose and phosphate. C. Covalent bonds between deoxyribose and the nitrogen bases. D. Covalent bonds between deoxyribose and phosphate. E. Covalent bonds between adenine and thymine and cytosine and guanine. 8.What is the difference between a chemoautotroph and a chemoheterotroph? A. Chemoheterotrophs use light as their energy source; chemoautotrophs do not. B. Chemoheterotrophs oxidize organic molecules for energy; chemoautotrophs do not. C. Chemoheterotrophs use CO as t2eir carbon source; chemoautotrophs use organic molecules. D. Chemoheterotrophs use organic molecules as a carbon source; chemoautotrophs use CO 2 9.Which of the following statements about cell theory and evolution is false? A. Evolution can be defined as a change in allele frequencies within a population over time. B. Evolution by natural selection occurs when individuals within a population adapt to changes in the environment and pass these changes on to their offspring. C. The direction of evolutionary change can be influenced by changes in the environment. D. The notion of common ancestry is supported by the cell theory which states that all cells come from pre-existing cells. Page 3 of 7 Biol1000 Fall 2012 – Test 1 10.The following molecule is a A. Lipid B. Protein C. Amino acid D. Carbohydrate E. Nucleic acid 11.Which of the following things ar
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