Question

Name 30. Assame that in the lab you inoculate Estherichia coli into a nutrient agar plate and incubate it at 37 degrees Celcius for 48 hours. Daring the next lab period, you observe some colonies on the plate that are mostly creamish off white in color and several bright red ones. What is the most likely explanation? The culture was contaminated a. Nutrient agar is differential The culhare was not properly incubated b. c. d. Nutrient agar is selective 31. CSH1206+ CSH1206C1222011+ H20 represents a. the formation of a disaccharide b. the formation of a pettide bond c. a decomposition reaction d. a denaturation reaction e. a dehydration synthesis 32 In producing beer and wine, humans have exploited the microbial ability to ferment sugar to alcohol. The microbes widely used in this process are a algae b. bacteria d. fungi a. missense 33. A mutation that changes a normal codon to a stop codon is referred to asmutation. h. back silent d. nonsense e. frameshift Which of the following enzymes are able to cut DNA strands at selected sequences? 34. a. Palindrome b. Restriction Enzymes c. DNA Helicase d. DNA polymerases 35. When the broad spectrum antibiotics disrupt the body's normal flora, the patient often developes which of the following? b. Superinfection c. Cancer d. Allergic reactions 36. Complete the following statement accurately. A solution with pH of 2 than a solution with pH of 8 a. Has less H+ b. Has more H+ Has more OH- is less concentrated c. d. The use of microorganisms to clean the environment is known as: 37. c. bioremediation d. epidemiology b. toxicology

Answer 1

31. C6H1206 + C6H1206= C11H22O11+H2O represents the formation of a disaccharide as because both the reactants are monomer that is monosaccharide.

32. In producing beer and wine human have exploited the microbial activity to ferment sugar into alcohol. The microbes used in that process are fungi that is specifically the yeasts.

33. The mutation changes a normal codon into a stop codon is called the nonsense mutation.

34. Restriction enzymes are able to cut DNA at particular sequences which are known as restriction sites or palindromic sequences.

35. When the broad spectrum antibiotic disrupts the normal flora of the body, the patients often develop superinfection within the body.

36. A solution of pH 2 has more H+ than the solution of pH 8.

37. The use of microorganisms to clean the environment is known as bioremediation.

30. The most probable reason of that is the culture is contaminated because unless and until the culture is contaminated there will be no growth of that several bright red one colony along with creamish off-white colony (that of E.coli).