Biol 220 Exam 1 Utk Already Graded A+

BIOL 220 EXAM 1 UTK ALREADY GRADED A+Which of the following is/are shared by all cells? a) Mitochondria b) Endoplasmic Reticulum c) Nucleus d) Cell Membrane d) Cell Membrane Which of the following best supports the endosymbiotic theory? a) Mitochondria synthesize ATP b) Chloroplasts and mitochondria both use host cell ATP synthases for energy generation c) Chloroplasts synthesize glucose d) Chloroplasts and mitochondria both maintain their own unique DNA d) Chloroplasts and mitochondria both maintain their own unique DNA In order to establish a biofilm within the intestines of humans, bacteria may adhere initially to the intestinal wall using _______ before secreting a polymeric matrix. a) Fimbriae b) Glycoprotein Spikes c) Cilia d) Teichoic Acids a) Fimbriae Bacteria have been treated with oligomycin, which inhibits ATP synthase. Which of the following transport process(es) will be affected? I. O2 movement across the plasma membrane II. Water movement across the membrane nursing III. Antibiotic efflux using an ABC transporter III only :Antibiotic efflux using an ABC transporter (because ABC transporters rely on ATP synthase) Why is penicillin ineffective in treating “walking pneumonia,” an infection typically caused by Mycoplasma? a) Because Mycoplasma is gram-positive b) Because Mycoplasma is gram-negative c) Because Mycoplasma lacks a cell wall d) Because Mycoplasma is acid-fast c) Mycoplasma lacks a cell wall (penicillin works by preventing complete formation of the cell wall) True or False: Quorum sensing only occurs when bacteria turn on antibiotic resistance genes when enough bacteria are living in one place. False You grow a bacterium in many oxygen concentrations. The bacterium takes 45 minutes to double if grown in a high oxygen environment. If this bacterium is a facultative anaerobe and you now incubate in a tube with no oxygen, you would expect the doubling time of this bacterium to: a) stay the same b) increase c) decrease b) increase Which treatment induces pyrimidine dimers that may inhibit DNA replication and transcription? a) Exposure to ultraviolet radiation nursing b) Exposure to temperatures of 200°C c) Exposure to pressures great than 1,000 psi d) Exposure to a solution of 70% isopropyl alcohol a) Exposure to UV radiation Formation of endospores: a) Occurs in all bacterial cells b) Occurs when the cell has excess polyphosphate c) Is called germination d) Allows bacterial reproduction e) Can be triggered by adverse environmental conditions e) Can be triggered by adverse environmental conditions In bacterial cells, ribosomes are packed into the cytoplasmic matrix and also loosely attached to the plasma membrane. What is the function of ribosomes? a) Site of protein synthesis b) Site of energy production c) Site of genetic reproduction a) Site of protein synthesis Carbon dioxide is reduced in: a) Cyclic photophosphorylation. b) Both light and dark reactions. c) The Calvin cycle. d) Noncyclic photophosphorylation. e) The light reactions. c) Calvin cycle nursing