Exam 1 - Microbiology - Study Guide, Lecture notes of Microbiology

Download Exam 1 - Microbiology - Study Guide and more Lecture notes Microbiology in PDF only on Docsity! 2021 Fall BIOL 2051 for Tatiana Luzan / Lecture Exams and quizzes / Exam 1 BIO 2051 Sep 15 Started on Wednesday, September 15, 2021, 1:30 PM State Finished Completed on Wednesday, September 15, 2021, 1:56 PM Time taken 26 mins 25 secs Points 24.00/25.00 Grade 9.60 out of 10.00 (96%) Question 1 Correct 1.00 points out of 1.00 The use of Gram stain in microbiology is important because the di!erentiate a. bacterial cells with di!erent types of cell wall ! b. archaeal cells from eukaryotic cells c. prokaryotes from eukaryotes Your answer is correct. The correct answer is: bacterial cells with di!erent types of cell wall Question 2 Correct 1.00 points out of 1.00 Question 3 Correct 1.00 points out of 1.00 The cytoplasmic membrane could best be described as a. a rigid protective barrier b. impermeable barrier c. a passive conduit d. a highly selective permeability barrier ! Your answer is correct. The correct answer is: a highly selective permeability barrier Differential selection and decent with modification occurs during a process called a. evolution ! b. cellular di!erentiation c. transformation d. growth Your answer is correct. The correct answer is: evolution Question 8 Correct 1.00 points out of 1.00 Question 9 Correct 1.00 points out of 1.00 Activation Energy is the energy required for a chemical reaction to begin Select one: !True False The correct answer is 'True'. When does endospore formation commence? a. when bacteria exponentially divide b. When the bacterium is undergoing binary fusion c. When bacterial growth ceases due to limitation of an essential nutrient ! d. following bacterial death Your answer is correct. The correct answer is: When bacterial growth ceases due to limitation of an essential nutrient Question 10 Incorrect 0.00 points out of 1.00 Question 11 Correct 1.00 points out of 1.00 Cells move polar molecules across the cell membrane against a concentration gradient using a. random movement b. modification to membrane lipids c. Energy and Transport Proteins d. simple di!usion " Your answer is incorrect. The correct answer is: Energy and Transport Proteins The change in free energy for a particular reaction is most useful in determining a. ) the amount of energy catalysts required for biosynthesis or catabolism. b. the potential metabolic rate c. whether there will be a requirement or production of energy. ! Your answer is correct. The correct answer is: whether there will be a requirement or production of energy. Question 12 Correct 1.00 points out of 1.00 Question 13 Correct 1.00 points out of 1.00 Based on the functional roles of phosphate in various microbial metabolisms, which of the following compounds most likely contain phosphate? a. Inorganic compounds b. Both organic and inorganic ! c. Organic compounds d. Neither Your answer is correct. The correct answer is: Both organic and inorganic Which of the following statements is FALSE a. Some bacteria are able to use nitrates or nitrogen gas as their nitrogen source. b. Nitrogen is a major component of proteins and nucleic acids. c. Most bacteria are capable of using ammonia as their sole nitrogen source. d. Most available nitrogen is in organic forms ! Your answer is correct. The correct answer is: Most available nitrogen is in organic forms Question 17 Correct 1.00 points out of 1.00 Question 18 Correct 1.00 points out of 1.00 Biological catalysts involved in the acceleration of the rate of chemical reactions are called a. enzymes ! b. catalytic converters c. evolutionary molecules. d. growth agents Your answer is correct. The correct answer is: enzymes Based on your understanding of metabolism, generalize when an enzyme's rate of activity can be changed a. a"er enzyme production ! b. during enzyme production c. before enzyme production d. at any point - before, during or a"er enzynme production Your answer is correct. The correct answer is: a"er enzyme production Question 19 Correct 1.00 points out of 1.00 The terms "run" and "tumble" are generally associated with a. eukaryotic cell b. chemotaxis ! c. clustering of certain rod-shaped bacteria d. nutrient transport Your answer is correct. The correct answer is: chemotaxis Question 20 Correct 1.00 points out of 1.00 Using phase contrast microscopy on a wet mount of live cells, you observe motile bacilli moving rapidly and randomly through the field of view, changing directions after a brief tumble and taking off in a different direction. These cells are exhibiting ________ motility. a. swimming ! b. gliding c. twitching or glioding d. twitching Your answer is correct. The correct answer is: swimming Question 24 Correct 1.00 points out of 1.00 Question 25 Correct 1.00 points out of 1.00 The sum of all biosynthetic reactions in a cell is known as a. metabolism b. catabolism c. anabolism ! Your answer is correct. The correct answer is: anabolism Which of the following statements is correct? a. Microorganisms represent a much smaller amount of Earth's biomass than plants. b. Microorganisms are significant contributors to the total biomass on Earth. ! c. Microorganisms represent a much smaller amount of Earth's biomass than animals. Your answer is correct. The correct answer is: Microorganisms are significant contributors to the total biomass on Earth. Jump to...