Louisiana State University

List the following from smallest to largest: ecosystem, atom, community, molecule, species, cell, population, tissues, organism, biosphere, organs, organ system. - Answer Atoms, molecules, cells, tissues, organs, organ system, organism, species, population, community, ecosystem, biosphere Describe an ionic bond and give an example. - Answer Electrons being transferred between any atoms. Ex. NaCl Describe a covalent bond and give an example. - Answer Electrons being shared...

Staphylococcus aureus - Answer -Gram (+) cocci in clusters** -Catalase (+)** -Produces Coagulase (fibrin clot)** -Produces beta hemolysin** -Ferments mannitol** -Yellow on MSA plate** -Part of normal microbiota -Capable of causing sever illness -Can produce virulence factors & is considered a pathogen -Produces enterotoxin responsible for gastroenteritis (diarrhea) & food poisoning -Produces toxin that causes Toxic Shock Syndrome -Common infections = Styes, pimples, boils -Resp...

complex medium - Answer composed of digest of chemically undefined substances defined medium - Answer precise chemical composition is known agar is extracted from ... - Answer Rhodophyta (red algae) after heating to 100 deg, it will solidify at 40-42 deg and not remelt until it reaches ____ deg - Answer 80-90 plates are primarily used for... - Answer isolation of microorganisms, streak plates deeps are used for ________ growth - Answer anaerobic...

An individual's ___ and ___ are the key determinants for physical characteristics of an organism. - Answer genetics; environment ___ have the metabolic pathway to synthesize a red-colored pigment call prodigiosin at room temperature. - Answer Serratia marcescens True or false?: Not every organism has an environment at which is grows best. - Answer False; every organism does Benefit of low temperature? Benefit of high temperature? - Answer low: acts as food pr...

Metabolism: - Answer sun of reactions that are associated with the life of a cell Enzymes: - Answer proteins that serve as biological catalysts What would happen if we didn't have enzymes? - Answer None of the reactions associated with living cells would occur at a rapid enough rate for life as we know it to exist. Substrate: - Answer substance that an enzyme reacts with to catalyze a certain reaction True or false?: An enzyme can catalyze multiple types of...

Metabolism - Answer sum of the rxns that are associated w/ the life of a cell Enzymes - Answer -proteins that serve as biological catalysts -generally, can react w/ only one substance called the substrate Without enzymes - Answer none of the rxns associated w/ living cells would occur at a rapid enough rate for life as we know it to exist Substrate - Answer -reacts w/ a specific enzyme to catalyze only one reaction Extracellular enzymes - Answer -enzyme...

If you want to grow large volumes of a microbe, what type of media would be best to use? - Answer broth True or false: Some culture media, like MSA (mannitol salt agar), can be both selective and differential. - Answer TRUE Which of the following events immediately follows heating to dissolve media powder in water when making plate media? Allow media to temper Allow agar to solidify Pour plates Autoclave flask of media - Answer autoclave flask of media Which of t...

what is carbon cycled through - Answer land, oceans, freshwater, sediments, rocks, and biomass nitrogen cycle - Answer links particularly strongly to carbon cycle because other than water (H2O), Carbon and _ make up the bulk of living organisms important perimeters in understanding the cycling of elements - Answer reservoir size and turnover percent of total: rocks and sediments reservoirs on Earth - Answer 99.5 percent of total: ocean reservoirs on Earth - An...

When counting colonies on an agar plate, it is generally assumed that each colony resulted from one, original cell. True or false? - Answer True Which of the following antibiotics specifically inhibits DNA synthesis? tetracycline quinolones gentamycin polymyxin B - Answer quinolones In higher eukaryotes, most aerobically generated ATP is produced by A. a membrane-bound proton translocating ATP synthase during oxidative phosphorylation. B. the TCA cycle C. all...

Bacterial cells that are variable in shape are called - Answer pleomorphic Which group of microbes contains organisms necessary for production of wine and bread? a) Archaea b) Bacteria c) Fungi d) Algae - Answer c (fungi) What is the most compelling reason why DNA, rather than RNA, evolved to be the storage repository for genetic information in cellular life forms? a) DNA molecules are more chemically stable than RNA molecules. b) DNA has deoxyribose rather ...