final exam straighterline microbiology with aprroved answers.

final exam straighterline microbiology with approved answers. In the nitrogen cycle, which of the following steps involves removal of nitrogen from the atmosphere by bacteria? - correct answer.Nitrogen Fixation If enough H+ ions are added to pure water to raise the H+ concentration of the solution to ten times higher than the original concentration, what is the resulting OH- concentration of the solution? - correct answer.10-8 M Fungi are able to reproduce asexually by creating conidiospores and sporangiospores. Which of the following is an accurate explanation for why it is advantageous that they are also capable of sexual reproduction? - correct answer.Offspring from two parents may have variations in form and function that contribute to survival of the species. In a laboratory bacterial cell culture that has been infected by a virus, plaques are areas in which... - correct virus has spread and left behind the remains of dead cells. The sun's energy is delivered as discrete packets that travel as waves and are called - correct answer.Photons What is a characteristic of aerobic respiration? - correct answer.The process includes glycolysis, the Krebs cycle, and the electron transport chain. In completing protein synthesis in a prokaryote, what basic message is carried by a specialized codon that has no corresponding tRNA? - correct answer."Terminate here." Microbial drug resistance can be caused by mutations or by introduction of new genes into a population. Which of the following can only be caused by the introduction of new genes into a population? - correct enzymes that inactivate the drug are synthesized Why do the hands, feet, and breasts have more lymphatic vessels for host defense than other areas of the human body? - correct answer.They have a high risk for infection due to frequent contact. Penicillin functions as an antimicrobial agent by inhibiting bacterial... - correct wall synthesis. Which class of eukaryotic microorganisms can be subdivided into groups such as Mastigophora, Sarcodina, Ciliophora, and Apicomplexa? - correct answer.Protozoa Genetic material can be excised from one chromosome and directly integrated into another via... - correct posons What immune cell secretes numerous cytokines that help to coordinate the response of other immune cells? - correct answer.TH cell What enzymes are used to amplify DNA during PCR? - correct answer.DNA polymerase Which of the following is a scientific name? - correct answer.Streptococcus pyogenes Eosin-methylene blue agar, or EMB, is a commonly used bacteriological medium for growing gram-negative bacteria from complex environments. It contains two dyes, eosin and methylene blue, as well as the sugar lactose. Eosin is a pH indicator that changes color when the medium is acidic, while methylene blue inhibits the growth of most gram-positive bacteria. If an organism consumes lactose, acid will be produced, causing the bacterial colonies to change color. Based upon this description, this medium is ______ - correct rential and selective A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding from the Last Universal Common Ancestor would show Archaea - correct hing off the Domain Eukarya. In the cell cytoplasm, molecules of ATP are a - correct e The _____ of the microscope holds and allows selection of the objective lenses. - correct iece Characteristics shared by all cells include - correct presence of cellular fluid, the possession of genetic information, and a membrane serving as a cell boundary. Anything that occupies space and mass is called... - correct r Trees of life illustrate the phylogenetic relationships of all organisms were traditionally based on _____; newer methods for determining phylogeny rely on _____. - correct answer.Morphology; nucleic acid sequences Covalent bonds - correct t from sharing electrons One nucleotide contains one - correct hate, pentose sugar, nitrogen base Among the types of microorganisms, the ___. are noncellullar - correct es Using microbes to detoxify a site contaminated with heavy metals is an example of ____ - correct answer.Bioremediation C6H12O6+C6H12O6--- C12H22O11+H2O - correct answer.a dehydration synthesis Which scientific field is involved in the identification, classification, and naming of organisms? - correct answer.Taxonomy Which type of medium would be the best choice when shipping a sample of bacteria from a clinic to a laboratory for testing? - correct answer.Transport-meduim Which activity is an example of biotechnology? - correct answer. Which of the following is produced by adding 1% to 5% agar to nutrient broth that is then boiled and cooled? - correct answer.A solid medium Most biochemical macromolecules are polymers, which are chains of... - correct ting monomers A reducing medium contains - correct ances that remove oxygen Which of the following parts of a microscope magnifies the specimen to produce a real image of the specimen? - correct answer.Objective lens The two major groups of helminths are ___ and the ___ - correct worm; flatworms All of the following pertain to virus envelopes except - correct ed between the capsid and nucleic acid A protozoan having flagellum would be classified in the genus - correct answer.Trypanosoma Antiviral drugs are often difficult to develop, largely because - correct es are obligate intracellular parasites so the drugs must enter the host cell and often cause toxic side effects in order to destroy the virus The activation of a prophage is called... - correct tion Endospores are - correct olically inactive, resistant to heat and