Question: A photoautotroph uses _____ for energy and _____ for its carbon needs.
Answer Choices: light; CO2 organic chemicals; inorganic chemicals inorganic chemicals; CO2 CO2; light
Answer: light; CO2
Question: Which must acquire its chemical energy from some outside source?
Answer Choices: Autotroph Heterotroph Both autotrophs and heterotrophs Neither autotrophs nor heterotrophs
Answer: Both autotrophs and heterotrophs
Question: A nutrient containing a combination of atoms other than carbon and hydrogen is called a(n) _____ nutrient.
Answer Choices: (No answer options provided)
Answer: inorganic
Question: The nutritional type of a specific microbe is determined by its sources of _____
Answer Choices: carbon and oxygen oxygen and energy carbon and energy carbon and hydrogen
Answer: carbon and energy
Question: What term is used to describe organisms that can generate their own food from inorganic compounds?
Answer Choices: Heterotrophs Saprotrophs Autotrophs
Answer: Autotrophs
Question: Redox reactions are generally always paired where one compound is _____ (donates electrons) and the other is _____ (accepts electrons).
Answer: oxidized; reduced
Question: Which type of organism must obtain its carbon from organic sources?
Answer Choices: Heterotroph Chemotroph Phototroph Autotroph
Answer: Heterotroph
Question: Reactions in which one compound loses electrons and another compound gains electrons are called _____ reactions.
Answer: redox
Question: Which of the following are essential nutrients for microbes? [Note that these are usually needed in large amounts.]
Answer Choices: Phosphate Oxygen Nitrogen Magnesium Iron Carbon Hydrogen Sulfur
Answer: Phosphate, Oxygen, Nitrogen, Carbon, Hydrogen, Sulfur
Question: A microbe that requires only inorganic nutrients and carbon dioxide as a sole carbon source is called a(n) _____
Answer: autotroph
Question: A cell typically contains _____ water.
Answer Choices: 40% 15% 5% 70%
Answer: 70%
Question: A reaction that releases energy as it proceeds is a(n) _____ reaction.
Answer: exergonic
Question: Which of the following is NOT a good example of a chemoheterotroph?
Answer Choices: Plants Humans Fungi Bacteria
Answer: Plants
Question: If a cell LOSES water after being placed into a particular solution, what is true regarding the tonicity of the solution?
Answer Choices: The solution is hypotonic relative to the cell. The solution and cell are isotonic relative to each other. The solution is hypertonic relative to the cell.
Answer: The solution is hypertonic relative to the cell.
Question: Which organism relies upon organic compounds for its carbon and energy needs?
Answer Choices: Autotroph Heterotroph Phototroph
Answer: Heterotroph
Question: In this image illustrating noncompetitive inhibition, the circle surrounds the _____.
Answer Choices: regulatory molecule normal substrate noncompetitive inhibitor competitive inhibitor
Answer: allosteric site
Question: Which of the following are essential nutrients for microbes? [Note that these are usually needed in large amounts.]
Answer Choices: Magnesium Hydrogen Iron Oxygen Phosphate Carbon Sulfur Nitrogen
Answer: Hydrogen, Oxygen, Phosphate, Carbon, Sulfur, Nitrogen
Question: Which definition best describes oxidation?
Answer Choices: when a compound loses electrons to an electron-accepting compound when a compound gains electrons from an electron-donating compound
Answer: when a compound loses electrons to an electron-accepting compound
Question: Microbes that use organic compounds for energy and inorganic compounds as a carbon source are called _____
Answer Choices: photoautotrophs heterotrophs chemoautotrophs
Answer: chemoautotrophs
Question: Enzymes are typically _____ substrates.
Answer Choices: larger than about the same size as smaller than
Answer: larger than