Download Bio 181 Exam 1 Shaffer Questions and Answers: A Comprehensive Study Guide and more Exams Biology in PDF only on Docsity!
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What type of molecular interaction is the strongest (of those listed)? - - - correct answer ✅Ionic Bonds Ionic or Covalent Bond? - - - correct answer ✅Covalent Ionic or Covalent Bond? - - - correct answer ✅ionic A sample of fabric from a cave in Nepal is tested for its Carbon isotope ratios. It is found that only 50% is carbon 14. How old would that date the sample to be? - - - correct answer ✅5,730 years old A sample of fossilized T-Rex bone is shown to have 0% carbon 14. How old would that make the sample? - - - correct answer ✅C-14 is not the appropriate isotope for such ancient fossils
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Which element would you expect radium (Ra) to imitate in our bodies upon exposure? - - - correct answer ✅Calcium (Ca) What kind of nutrient deficiency would you diagnose for the plant below? - - - correct answer ✅Nitrogen deficiency Where do we see a 'dead zone' each year as a result of cultural eutrophication? - - - correct answer ✅-In the Gulf of Mexico where the Mississippi River meets the ocean -Many major river systems world-wide What are the 'big six' elements that are most important for life on earth? - - - correct answer ✅B. H, C, N, O, P, S How many amino acids is all of life built upon? - - - correct answer ✅ 20
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thalidomide caused ~10,000 cases of phocomelia, with about 5, infants surviving. Which type of fatty acid will likely have the lowest melting point? - -
correct answer ✅Shorter and unsaturated Which structures can phospholipids form in the presence of water?
correct answer ✅A. Micelle B. Bilayer membrane C. Liposome ---------------> D. All of the above Which kind of reaction results in the loss of an electron? - - - correct answer ✅Oxidation Glycolysis is - - - correct answer ✅anaerobic
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Which of the following is NOT one of the net final products of glycolysis? - - - correct answer ✅Two molecules of acetyl-CoA Cellular respiration releases energy. In cellular respiration: - - - correct answer ✅A. Organic molecules such as carbohydrates are converted to chemical energy that can be used to do the work of the cell B. The chemical potential energy stored in organic molecules is converted to chemical energy that can be used to do the work of the cell C. Chemical potential energy in the bonds of ADP is transferred to the chemical potential energy in the bonds of ATP. -all correct A molecule that is _____ loses electrons, and a molecule that is _______ gains electrons.• - - - correct answer ✅Oxidized; Reduced If oxygen is not present, the next stage after glycolysis will be - - - correct answer ✅Fermentation
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What has been the largest source of energy for human cultural evolution? - - - correct answer ✅fossil fuels From an animal's perspective, what is the most important by- product of photosynthesis? - - - correct answer ✅-Oxygen -Carbohydrate foods What is the name of the photosynthetic organelle of plants? - - - correct answer ✅Chloroplast Photosystem II pulls electrons from _____, resulting in the production of oxygen and protons on the lumen side of the membrane. Photosystem I passes electrons to ______, producing ______ for use in the Calvin cycle. - - - correct answer ✅water; NADP+; NADPH Which toxic element is chemically similar Zinc? - - - correct answer ✅Mercery Hg Cadmium Cd
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Diagnose this plant's nutrient deficiency: - - - correct answer ✅Nitrogen Deficiency Diagnose this plant's nutrient deficiency - - - correct answer ✅Zinc Deficiency The pH of a very strong acid - - - correct answer ✅ 2 Ocean acidification is due to... - - - correct answer ✅Absorption of CO2 by the earth's oceans which lowers the pH Which element (chemically similar to Carbon) is often considered an alternate backbone of life - - - correct answer ✅Silicon (Si) Which level of protein structure is depicted in this picture? - - - correct answer ✅primary
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Which toxic element can replace Calcium in our bodies? - - - correct answer ✅Radium, Ra Which kind of organic compound is pictured? - - - correct answer ✅Carbohydrate/ sugar What kind of molecule is shown in the picture? - - - correct answer ✅phospholipid layer All things being equal which fatty acid will have a higher melting point? - - - correct answer ✅Long-chain fatty acid Saturated or unsaturated fat? - - - correct answer ✅saturated Which type of molecular interaction is strongest? - - - correct answer ✅covalent bond Water is a... - - - correct answer ✅polar molecule
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A high pH is typical of - - - correct answer ✅bases What element is called the 'backbone of life'? - - - correct answer ✅carbon Which of the following pathways can occur only in the presence of oxygen? - - - correct answer ✅Citric Acid Cycle Electron transport chain During ETC, the pH of the matrix is ____ than the inter membrane space. - - - correct answer ✅higher Which of the following are examples of coenzymes? - - - correct answer ✅Vitamin A Vitamin B
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The shared biochemistry of all life is often considered evidence for:
correct answer ✅Shared common descent of all life on earth. Water has which property or properties? - - - correct answer ✅Hydrophilic Forms hydrogen bonds Which other element (besides Carbon) is often suggested as having potential for life - - - correct answer ✅Silicon Which kind of organic compound is pictured? - - - correct answer ✅amino acid What kind of molecule is shown in the picture? - - - correct answer ✅polypeptide
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All things being equal which fatty acid will have a lower melting point? - - - correct answer ✅Short-chain fatty acid A low pH is typical of - - - correct answer ✅acids This amino acid is capable of forming disulfide bridges - - - correct answer ✅Cysteine Name this compound... - - - correct answer ✅cholesterol Exothermic or Endothermic? - - - correct answer ✅exothermic Which level of protein structure? - - - correct answer ✅quaternary The name of a conceptual model for enzyme action - - - correct answer ✅Lock and Key
