BIO 171 FINAL EXAM

BIO 171 FINAL EXAM Nucleus - CORRECT ANSWER-Contains genomic Endoplasmic Reticulum - CORRECT ANSWER-Series of membrane-enclosed sacs and interconnected tubes Lysosomes - CORRECT ANSWER-contain hydrolytic enzymes for digestion Chloroplasts - CORRECT ANSWER-Site of photosynthesis Briefly explain how a Scanning Electron Microscope ( SEM ) forms an image of subcellular organelles , substrates , and viral particles . - CORRECT ANSWER-An image is formed from the interactions of electrons as they reflect off ( not through ) the surface of the specimen Samples are coated in either gold or palladium to enhance electron reflections . The reflection is seen in 3 - D rendering . Scalded Skin Syndrome - CORRECT ANSWER-Staph aureus Bubonic plague - CORRECT ANSWER-Yersina pestis Opthalmia Neonatorium - CORRECT ANSWER-Staphylococcus Legionnaires - CORRECT ANSWER-Legionella E. Coli - CORRECT ANSWER-Prokaryote Archaeons - CORRECT ANSWER-Prokaryote Yeast - CORRECT ANSWER-Eukaryote Amoeba - CORRECT ANSWER-Eukaryote Phototroph - CORRECT ANSWER-Utilize photons to Lithotroph - CORRECT ANSWER-Remove electrons from inorganic molecules Autotroph - CORRECT ANSWER-Obtain their source of carbon from inorganic molecules Chemotroph - CORRECT ANSWER-Acquire energy from A researcher is looking to determine the source of contamination of a patient that presented with symptoms of food poisoning . To best determine between E. coli or Salmonella as the cause , what type of agar will be used to isolate the growth of each ? - CORRECT ANSWER-Differential Media Place the following viral life cycle steps in order beginning with viral attachment ( 3points ) and provide a description of " ENTRY " ( 1 point ) . - CORRECT ANSWER-1. Attachment 2. Entry 3. Uncoating 4. Replication 5. Release 6. New infection The Gram stain differentiates between bacteria based on the composition of their - CORRECT ANSWERCell Wall Left untreated , three percent of cases of Streptococcal pharyngitis will progress to which of the following ? - CORRECT ANSWER-Rheumatic fever Describe TWO differences between DNA and RNA . - CORRECT ANSWER-RNA contains the sugar ribose rather than deoxyribose . RNA is always single - stranded , whereas DNA is double stranded True or False When grown on Blood Agar Plates ( BAP ) , microbes capable of alpha hemolysis present as greenish - brown color colonies due to incomplete ( partial ) lysis of red blood cells - CORRECT ANSWERTrue Each of the following statements about glycolysis is true , except : - CORRECT ANSWER-The net gain is 4 ATP Describe the ONE main differences between lytic and temperate phages . - CORRECT ANSWER-Lytic bacteriophages replicate within the host bacteria until it ruptures whereas temperate ( or lysogenic ) phages primarily exist in a non - replicative state that does not kill the host cell . Bacteria that have a curved rod morphology are referred to as - CORRECT ANSWER-Vibrio You want to observe the movement of microorganisms that are present in a sample of cheek cells obtained on a patient . Briefly explain the technique that you would use and how it is performed - CORRECT ANSWER-A wet mount stain is indicated . A small liquid culture ( usually just a drop ) containing a microorganism of interest is prepared , added to a slide , and then covered with a glass coverslip . The coverslip is present to both protect the objective and the specimen while also holding the microorganism in place . Wet mounts are used to observe the motility and behavior of an organism . What coronavirus - associated infection gave rise to quarantining and travel restrictions in 2003 ? - CORRECT ANSWER-SARS A multi - purpose media capable of growing a wide variety of microorganisms - CORRECT ANSWERTrypticase Soy Agar Also known as lysogeny broth , it is a multi - purpose media capable of growing a wide variety of microorganisms . - CORRECT ANSWER-LB Agar Pale red in color and is both selective and differential media . The presence of crystal violet and bile salts in its formulation restricts Gram positive bacterial growth . As such , only Gram negative microbes can be grown . - CORRECT ANSWER-MacConkey Agar This Agar is selective for Gram - positive bacteria and can differentiate members of the Staphylococci family . - CORRECT ANSWER-Mannitol Salt Agar True or False Leprosy can move through the blood to other areas including the brain , spine , and kidneys . - CORRECT ANSWER-False : TB is primarily considered a respiratory infection , but once it fully