The sum total of all the microbes in a certain environment is termed
the______
Select one:
a. biofilm
b. microbial niche
c. microbiome
d. phylogeny
e. domain: Microbiome
2. Studies of the immune response to an infection caused by
microorganisms would be performed by a/an _______.
Select o...
Straighterline Microbiology BIO 250 Unit 1-25 FINAL Exam Questions and answers Latest 2024/2025 Graded A+ 1. The sum total of all the microbes in a certain environment is termed the______ Select one: a. biofilm b. microbial niche c. microbiome d. phylogeny e. domain: Microbiome 2. Studies of the immune response to an infection caused by microorganisms would be performed by a/an _______. Select one: a. hypersensitivity specialist b. geomicrobiologist c. epidemiologist d. immunologist: Immunologist 3. Which of the following is NOT a recent discovery that has had a huge impact on the understanding of microbiology? Select one: a. Human microbiome project b. PCR technique c. Small RNAs d. Restriction enzymes e. All are significant discoveries.: All are significant discoveries 4. A scientist studying the sequence of nucleotides in the rRNA of a bacterial species is working on _______. Select one: a. determining if that species is the cause of a new disease b. determining evolutionary relatedness c. nomenclature d. recombinant DNA e. bioremediation: Determining evolutionary relatedness 5. Which of the following historical microbiologists is incorrectly paired with his contribution to the science? Select one: a. Francesco Redi: tested spontaneous generation with meat exposed to the air or covered with cloth b. Louis Pasteur: demonstrated that anthrax was caused by a bacterium c. Joseph Lister: promoted disinfecting hands and air prior to surgery d. Antonie van Leeuwenhoek:made and used quality magnifying lenses to observe and record microorganisms: Louis pasteur: Demonstrated the anthrax was caused by a bacterium 6. Which of the following is a taxon that contains all the other taxa listed? Select one: a. Phylum b. Genus c. Kingdom d. Family e. Species: Kingdom 7. Which of the following are not considered microorganisms? Select one: a. Mosquitoes b. Fungi c. Bacteria d. Viruses e. Protozoa: Mosquitoes 8. The microorganisms that recycle nutrients by breaking down dead matter and wastes are called ______. Select one: a. prokaryotes b. decomposers c. pathogens d. fermenters e. eukaryotes: b. Decomposers 9. Which of the following is a unique characteristic of viruses that distinguishes them from the other major groups of microorganisms? Select one: a. Cannot be seen without a microscope b. Cause human disease c. Lack a nucleus d. Lack cell structure e. Contain genetic material: Lack of Cell structure 10. All cells contain _______. Select one: a. mitochondria to generate ATP b. organelles for compartmentalization c. ribosomes for protein synthesis d. cell walls made of cellulose e. uracil in their DNA: c. ribosomes for protein synthesis 11. Compared to a solution of pH 9, a solution of pH 7 _______. Select one: a. has a higher pH b. has no OH - ions c. is more basic d. has more H + ions: d. has more H + ions 12. Burning coal produces sulfur dioxide in the atmosphere. When combined with rain that falls into bodies of water, this leads to _______. Select one: a. a greater concentration of OH- ions in the water b. a decrease in the pH level of the water c. no change in the pH level of the water
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