Straighterline Micro 250 final prep Questions With Complete Solutions

Which class of eukaryotic microorganisms can be subdivided into groups such as Mastigophora, Sarcodina, Ciliophora, and Apicomplexa? A. Helminths B. Algae C. Protozoa D. Fungi correct answer: Protozoa Genetic material can be excised from one chromosome and directly integrated into another via A. conjugation. B. transformation. C. transduction. D. transposons. correct answer: transposons. Which immune cell secretes numerous cytokines that help to coordinate the response of other immune cells? A. B cell B. TH cell C. TC cell D. Platelets correct answer: TH cell Which of the following enzymes are used to amplify DNA during PCR? A. restriction endonuclease B. DNA polymerase C. reverse transcriptase D. DNA ligase correct answer: DNA polymerase In the nitrogen cycle, which of the following steps involves removal of nitrogen from the atmosphere by bacteria? correct answer: nitrogen fixation, In nitrogen fixation, nitrogen is removed from the atmosphere by nitrogen-fixing bacteria and converted to ammonia. 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 -8M 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? Select one: a. Asexually produced offspring are more likely to compete for resources and will kill off the parental fungi. b. Fungi normally produce sexually but produce asexually in harsh conditions such as severe drought.