Essay Questions 62. Why would the absence of living bacteria in something you were about to eat not necessarily be so indicative of how safe it was... Solved Biology 3 Views Bookmark
True / False Questions 52. The water activity in foods with high levels of salt or sugar is high. 53. Lactobacillus acidophilus can potentially colonize the intestinal tract. 54. Yeast cannot... Solved Biology 2 Views Bookmark
41. Most human pathogens grow best at temperatures near A. 20ºC.B. 25ºC.C. 37ºC.D. 45ºC. 42. S. aureus toxin is A. heat-stable.B. an exotoxin.C. an endotoxin.D. heat-sensitive.E. heat-stable AND an exotoxin. 43. As an added safety precaution, low-acid, home canned foods should... Solved Biology 2 Views Bookmark
31. In a cow's udder, milk A. contains Lactococcus.B. contains Lactobacillus.C. is acidic.D. is sterile. 32. The unique flavor of yogurt is due to the production of A. lactic acid and acetaldehyde.B. casein and alcohol.C. rennin and... Solved Biology 2 Views Bookmark
21. Clostridium botulinum typically does not produce its toxin under conditions that are A. anaerobic.B. alkaline.C. neutral.D. acid. 22. Lactic acid bacteria A. consume lactic acid, allowing them to grow on foods such as yogurt.B. produce... Solved Biology 3 Views Bookmark
11. The amount of moisture available in foods is designated by the term A. fluid availability.B. water activity.C. dampness quotient.D. aqueous usability. 12. Pure water has a water activity value of A. 1.00.B. 0.80.C. 0.70.D. 0.90. 13. Which of the... Solved Biology 2 Views Bookmark
Multiple Choice Questions 1. Most large cities have required the pasteurization of milk and milk products since A. 1800.B. 1850.C. 1900.D. 1920. 2. Human disease(s) from milk may include A. brucellosis.B. anthrax.C. amoebiasis.D. tuberculosis.E. brucellosis AND tuberculosis. 3. The connection between unpasteurized... Solved Biology 2 Views Bookmark
True / False Questions 31. The term "potable water" refers to water that is not necessarily pure, but is safe to drink. 32. Zero coliforms per 100 ml of... Solved Biology 2 Views Bookmark
21. Coliforms are A. Gram-negative.B. rod-shaped.C. non-spore forming.D. lactose-fermenting with acid and gas formation.E. All of the choices are correct. 22. Other microorganisms besides coliforms that have been used as indicators of fecal contamination... Solved Biology 2 Views Bookmark
11. The oxygen consuming property of a wastewater sample is designated by the term A. lagooning.B. stabilization.C. activation.D. biochemical oxygen demand. 12. The approximate BOD value for raw sewage is A. 2000-7000 milligrams per milliliter.B. 500-800... Solved Biology 2 Views Bookmark
Multiple Choice Questions 1. An effective means used early in the 19th century to clear water of the majority of bacteria was the use of A. chlorine.B. iodine.C. alcohol.D. sand filters. 2. Vibrio cholera... Solved Biology 2 Views Bookmark
Essay Questions 56. Discuss the phrase, "viable, but non-culturable". 57. Discuss the microenvironment vs. the macroenvironment. 58. Discuss how a microorganism community may serve as a defense mechanism against pathogens.... Solved Biology 2 Views Bookmark
True / False Questions 46. Bacteria are the most numerous soil inhabitants, but the biomass of fungi is greater. 47. A mycorrhizae is a symbiotic association between roots and... Solved Biology 2 Views Bookmark
41. Which of the following refers to a symbiotic association between plant roots and fungi? A. lichensB. geosminsC. extremophileD. mycorrhizae 42. Mycorrhizae are a symbiotic association of A. bacteria and algae.B. bacteria and virus.C. fungi and virus.D. plant... Solved Biology 2 Views Bookmark
31. Nitrogen is A. an important constituent of carbohydrates.B. primarily fixed by fungi.C. turned into ammonia by microorganisms.D. ultimately used in making amino acids and nucleotides.E. turned into ammonia by microorganisms AND... Solved Biology 2 Views Bookmark
21. The zone of soil that surrounds the roots and contains a variety of organic exudates is called the A. mycorrhizae.B. rootsphere.C. rhizosphere.D. geosmin. 22. The organisms that obtain energy by oxidation of... Solved Biology 2 Views Bookmark
11. Nutrient poor waters are described as being A. hypoxic.B. oligotrophic.C. autotrophic.D. eutrophic. 12. Eutrophic waters A. are nutrient rich.B. may become hypoxic.C. lack phosphate, nitrate and iron.D. contain 3.5% salt.E. are nutrient rich AND may become hypoxic. 13. It is... Solved Biology 2 Views Bookmark
Multiple Choice Questions 1. An early contributor to the understanding of nitrogen fixation was A. Hooke.B. Pasteur.C. Winogradsky.D. Beijerinck. 2. The term used to describe the interrelationship between the living and non-living environments in... Solved Biology 2 Views Bookmark
Essay Questions 65. Discuss the characteristics of HIV that make it relatively unique and hard to deal with.... Solved Biology 2 Views Bookmark
True / False Questions 54. HIV disease implies that the virus is multiplying and is interfering with the normal state of health. 55. Almost everyone infected with HIV develops... Solved Biology 2 Views Bookmark
Matching Questions 52. Which of the following best matches the description: 1. Associated with replication of infectious virions 2. Increased virion production 3. Moves viral RNA into the nucleus 4. Helps in attachment to the... Solved Biology 2 Views Bookmark
41. Carcinoma of the uterine cervix and anus is strongly associated with A. varicella virus.B. Epstein-Barr virus.C. herpes virus.D. human papilloma virus. 42. Pneumocystis is caused by a A. bacteria.B. fungus.C. virus.D. protozoan. 43. Which of the following is typically... Solved Biology 2 Views Bookmark
31. Medications that interfere with reverse transcriptase work by A. binding to the host ribosomes.B. binding to the reverse transcriptase.C. mimicking nucleosides.D. mimicking amino acids.E. binding to the reverse transcriptase AND mimicking... Solved Biology 2 Views Bookmark
21. After integration into the host chromosome, HIV is referred to as a A. previrus.B. provirus.C. viroid.D. proteosome. 22. Macrophages A. are not infected by HIV.B. often lyse and release HIV.C. survive and release virus over long... Solved Biology 2 Views Bookmark
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