front 1 1) A microorganism has the following characteristics: eukaryotic, multicellular, has cell walls, and grows in long filaments. What is its general classification? bacterium | back 1 fungus |
front 2 2) You have isolated microorganisms that are green, photosynthetic, have a cell wall, and do NOT possess a nucleus. These organisms are __________. bacteria | back 2 bacteria |
front 3 3)Which of the following is NOT an example of a fungus? algae | back 3 algae |
front 4 4)Microbiologists study parasitic worms because __________. they usually contain bacteria and other microbes | back 4 they cause diseases that are diagnosed by finding microscopic eggs in clinical specimens |
front 5 5)Which of the following is a true statement concerning bacteria and archaea? Bacteria are found only in extreme environments. | back 5 While some bacteria are pathogenic to humans, no archaea are known to cause human diseases. |
front 6 6)When the nucleus of an atom contains a constant number of protons but a variable number of neutrons, the atom is called a(n) __________. isotope | back 6 isotope |
front 7 7) Which of the following refers to the use of bacteria or other microbes to detoxify pollutants? biotechnology | back 7 bioremediation |
front 8 8) Which field of microbiology involves the study of microorganisms in their natural habitats? recombinant DNA technology | back 8 environmental microbiology |
front 9 9) Which of the following is an accurate description of viruses? they are visible with a light microscope. | back 9 they are acellular obligatory parasites. |
front 10 10) Which of the following is an incorrect pairing? fungi; cell walls | back 10 protozoa; multicellular |
front 11 11) A tiny (less than 2 micrometers) new organism is discovered living in a boiling hot "mud pot" (a type of mud spring). It is most likely a member of the fungi. | back 11 archaea. |
front 12 12) Parasitic worms, even meters-long tapeworms, are studied in microbiology because the Gram stain can be used to identify them. | back 12 diagnosis usually involves microscopic examination of patient |
front 13 13) Which of the following is NOT a characteristic of protozoa? they frequently possess cilia or flagella. | back 13 they are all photosynthetic. |
front 14 14) The microbes commonly known as ________ are single-celled eukaryotes that are generally motile. bacteria | back 14 protozoa |
front 15 15) Microorganisms characterized by the absence of a nucleus are called eukaryotes. | back 15 prokaryotes. |
front 16 16) Identification of bacteria in the laboratory usually begins with
the ________ for placement in one of two large groups of bacteria. | back 16 Gram stain |
front 17 17) The term for the use of microorganisms to restore damaged environments is epidemiology. | back 17 bioremediation. |
front 18 18) The control of infectious disease remains challenging a century after the understanding of infectious disease began. What contributes to the continuing challenge? rapidly growing estimates of the diversity of microbes
| back 18 both drug-resistant pathogens and emerging diseases |
front 19 19) Microbiologists study only single-celled organisms. | back 19 False |
front 20 20) A microbe with a cell wall and no internal membrane enclosing the
DNA is a prokaryote. | back 20 True |
front 21 21) Which of the following is a particle found in the nucleus of an atom and that has no electrical charge? element | back 21 neutron |
front 22 22) A stable atom has ________ in its valence shell. | back 22 8 electrons |
front 23 23)Which of the following is found only in eukaryotic cells? Cytoplasm | back 23 Nuclear envelope |
front 24 24)Which parts of the atoms interact in a chemical reaction? | back 24 electrons |
front 25 25) The type(s) of bonds produced when atoms share electrons equally is/are a polar covalent bond. | back 25 a nonpolar covalent bond. |
front 26 26) The type(s) of bond produced when atoms with somewhat different electronegativities share electrons is/are an ionic bond. | back 26 a polar covalent bond. |
front 27 27) Compounds that readily dissociate in water are | back 27 either polar or ionic. |
front 28 28) Which of the following is a property of water? it is liquid in a very narrow temperature range. | back 28 it has a high capacity for heat. |
front 29 29) An acid dissociates in water to release hydroxyl groups. | back 29 both anions and hydrogen ions. |
front 30 30) The reverse of a dehydration synthesis reaction is a(n) ________ reaction. hydrolysis | back 30 hydrolysis |
front 31 31) A hydroxyl ________ acts as a base. salt | back 31 anion |
front 32 32) Nucleic acid polymers, proteins, and complex carbohydrates are all produced by hydrogen bonding. | back 32 dehydration synthesis. |
front 33 33) Research suggests taking antacids may make people more
susceptible to infection with Vibrio vulnificus by making the stomach
environment more tolerable to the bacteria. Based on this information
and the name "antacid," which of the following are antacids
likely to be? | back 33 either base or buffer |
front 34 34) All of the following are components of an amino acid EXCEPT a(n) | back 34 pentose group. |
front 35 35) The "backbone" of the DNA molecule is composed of | back 35 alternating phosphates and pentoses. |
front 36 36) Proteins contain both acidic and basic R groups, and can
therefore function as | back 36 buffers. |
front 37 37)Bacterial cell walls are composed of polysaccharides. | back 37 peptides and polysaccharides. |
front 38 38) A reaction requires water as a reactant and produces heat. What type of reaction is likely to be involved? a synthesis reaction | back 38 a decomposition reaction |
front 39 39) What functional groups are present in ALL amino acids? amino and sulfhydryl groups. | back 39 amino and carboxyl groups |