For Tube A, B, C indentify if each tube are positive or negative for Nitrate reductase, Nitrite reductase and Super reducer.
Homework Answers
After adding one dropper of sufanilic acid and one dropper of a alpha-naphthylamine to each broth,a color change to RED indicates a positive nitrate reduction test as shown in test tube A, means organism has reduced nitrate to nitrite.No color change indicate absence of nirite as shown in test tube B.Test tube C is showing nitrite reduced into nitrogen dioxide (NO2), positive test result of nitrite reduction test .
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For Tube A, B, C indentify if each tube are positive or negative
for Nitrate reductase,...
Test interpretation: A. Addition of reagents A and B: color changed to redà nitrate reductase- positive...
Test interpretation:
A. Addition of reagents A and B: color changed to redà nitrate
reductase- positive (nitrate reducer). If this is the case, you are
done, do not add zinc powder.
B. Addition of reagents A and B: no color changeà it could be:
(a) nitrate reductase-negative (non-reducer) or (b) nitrate
reductase-positive (super reducer). ADD ZINC POWDER TO THE BROTH to
distinguish between these two possibilities.
1. If red color formsà nitrate is still present in the broth:
non- reducer....
Question 1: After recording the results from physiological testing, you will properly dispose of the plates...
Question 1: After recording the results from physiological testing, you will properly dispose of the plates in the biohazardous waste bag. a) True b) False c) No answer text provided. Question 2: If a Gram-positive coccus is catalase positive and presumed to be a staphylococcus, which of the following tests will be performed next? a) Glucose fermentation test b) coagulase test c) antibiotic susceptibility test d) Motility test Question 3: If a Gram-positive coccus is catalase negative and thought to...
B. negative. C. zero. D. positive then negative. E. negative then positive. 16. A common statistic...
B. negative. C. zero. D. positive then negative. E. negative then positive. 16. A common statistic in car tests is the standing (starting from rest) quarter-mile performance. A modern sports car can achieve a terminal speed (speed at the end of the quarter-mile) of 120 mph (193 km/h). How does the average acceleration compare to g? (0.25 mile 402 m) A. 0.36 g B. 2.8 g C. 0.067 g D. 3.57g E. 0.73 g
1) Is Ea positive or negative for each of the following: a) AB b)BC c)AC 2)...
1) Is Ea positive or negative for each of the following:
a) AB
b)BC
c)AC
2) Which step in the reaction AC
has the greatest Ea?
Reaction pathway
help please! 81% Help % Lab 39 worksheet 25% + Room Add Page Insert Durham Tube...
help please!
81% Help % Lab 39 worksheet 25% + Room Add Page Insert Durham Tube Sugar Fermentations Table Chart Text Shape Media Comment 1. Which tube, red or yellow, is positive for sugar fermentation? 2. Is the color change an increase or decrease in pH? 3. Which two gases can be revealed by the bubble in the inverted tube? Mixed Acid (MR test) and Butanediol production (Voges:Proskauer, VP test) 1. Which group of bacteria is the Mixed Acid test...
A project should be accepted if the: A. NPV is positive B. NPV is negative c....
A project should be accepted if the: A. NPV is positive B. NPV is negative c. accounting rate of return is positive D. accounting rate of return is negative
1) The lac operon is… a) Positive repressible b) Both negative inducible and positive repressible c)...
1) The lac operon is… a) Positive repressible b) Both negative inducible and positive repressible c) Positive inducible d) Negative inducible 2) An activator regulatory protein… a) Is involved in negative regulatory control b) Is a cis acting regulatory element c) Recruits RNA polymerase to the promoter d) Prevents RNA polymerase from binding the promoter 3) For the lac operon, the presence of the substrate (lactose) activates the repressor. True or False? a) true b) false 4) cAMP… a) Activates...
What does a positive result of a bacterial "catalase" test look like? What's in it that...
What does a positive result of a bacterial "catalase" test look like? What's in it that makes it look like so? Select one: O a. The small clump of bacteria appear at the bottom of the tube of test broth. The color of the broth turns deep red, showing acidic substance is being secreted by the bacteria b. The small clump of bacteria makes bubbles/ foams, and it is oxygen gas that's in the bubbles O c. The agar turns...
Indicate whether ΔS° is large and positive, large and negative, or nearly zero in each of...
Indicate whether ΔS° is large and positive, large and negative, or nearly zero in each of the following reactions. (a) NH3(g) + HCl(g) → NH4Cl(s) large and positive large and negative nearly zero (b) N2H4(g) → N2(g) + 2 H2(g) large and positive large and negative nearly zero (c) H2(g) + I2(g) → 2 HI(g) large and positive large and negative nearly zero (d) HF(aq) + NO2− (aq) → F − (aq) + HNO2(aq) large and positive large and negative...
2) AH corresponds to an process. a) negative, exothermic b) negative, endothermic c) positive, exothermic d)...
2) AH corresponds to an process. a) negative, exothermic b) negative, endothermic c) positive, exothermic d) zero, exothermic none of these is correct e) 3) Which one of the following processes is exothermic? 2H2 (g) + O2 (g) C2H2 (I) a) 2H2O (g) b) C2H2 (g) c) CO2 (g) +2H2O (g) d) C2H2 (s) None of these e) CH4 (g) +202 (g) C2H2 (I)
Test interpretation:
A. Addition of reagents A and B: color changed to redà nitrate
reductase- positive (nitrate reducer). If this is the case, you are
done, do not add zinc powder.
B. Addition of reagents A and B: no color changeà it could be:
(a) nitrate reductase-negative (non-reducer) or (b) nitrate
reductase-positive (super reducer). ADD ZINC POWDER TO THE BROTH to
distinguish between these two possibilities.
1. If red color formsà nitrate is still present in the broth:
non- reducer....
B. negative. C. zero. D. positive then negative. E. negative then positive. 16. A common statistic in car tests is the standing (starting from rest) quarter-mile performance. A modern sports car can achieve a terminal speed (speed at the end of the quarter-mile) of 120 mph (193 km/h). How does the average acceleration compare to g? (0.25 mile 402 m) A. 0.36 g B. 2.8 g C. 0.067 g D. 3.57g E. 0.73 g
1) Is Ea positive or negative for each of the following:
a) AB
b)BC
c)AC
2) Which step in the reaction AC
has the greatest Ea?
Reaction pathway
help please!
81% Help % Lab 39 worksheet 25% + Room Add Page Insert Durham Tube Sugar Fermentations Table Chart Text Shape Media Comment 1. Which tube, red or yellow, is positive for sugar fermentation? 2. Is the color change an increase or decrease in pH? 3. Which two gases can be revealed by the bubble in the inverted tube? Mixed Acid (MR test) and Butanediol production (Voges:Proskauer, VP test) 1. Which group of bacteria is the Mixed Acid test...
A project should be accepted if the: A. NPV is positive B. NPV is negative c. accounting rate of return is positive D. accounting rate of return is negative
What does a positive result of a bacterial "catalase" test look like? What's in it that makes it look like so? Select one: O a. The small clump of bacteria appear at the bottom of the tube of test broth. The color of the broth turns deep red, showing acidic substance is being secreted by the bacteria b. The small clump of bacteria makes bubbles/ foams, and it is oxygen gas that's in the bubbles O c. The agar turns...
2) AH corresponds to an process. a) negative, exothermic b) negative, endothermic c) positive, exothermic d) zero, exothermic none of these is correct e) 3) Which one of the following processes is exothermic? 2H2 (g) + O2 (g) C2H2 (I) a) 2H2O (g) b) C2H2 (g) c) CO2 (g) +2H2O (g) d) C2H2 (s) None of these e) CH4 (g) +202 (g) C2H2 (I)
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