Cell counting can be carried out by A. direct microscopic count using petroffhansser counting chamber B....
Cell counting can be carried out by
| A. | direct microscopic count using petroffhansser counting chamber |
| B. | plate counting |
| C. | membrane filter count |
| D. | all of the above |
Homework Answers
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Cell counting can be carried out by
A.
direct microscopic count using petroffhansser counting
chamber
B....
Direct counts of cells in liquid samples can be performed using a Petroff-Hausser counting chamber. Research...
Direct counts of cells in liquid samples can be performed using a Petroff-Hausser counting chamber. Research this method and describe how it compares to the viable plate count method of determining the number of CFU in a sample.
can anyone please help me answer these 3 biology questions? 20. The plate count method allows...
can anyone please help me answer these 3 biology
questions?
20. The plate count method allows direct count of total cells growing on solid medium. A. True B. False 21. Which of the following is a statistical procedure for estimating the number of viable microorganisms in a sample? A. Electronic cell counting device B. Most probable number (MPN) C. Petroff-Hausser chamber D. Spectrophotometry E. Viable plate count 22. Which of the following is the most commonly used to estimate and...
98) Superoxide dismutase is an entryme involved in oxygen detoxification 99) Obligate anacrobes can't express catal...
98) Superoxide dismutase is an entryme involved in oxygen detoxification 99) Obligate anacrobes can't express catalase. 100) Aerotolerant bacteria express catalase Back to Multiple Choice: 101) Bacterial numbers can be obtained by a) counting them in a chamber slide b) using a coulter counter c) determining cfu by spread-plate plate counts d) optical density e) all of the above 102) The coulter counter works based on a) photons b) electron e) cell growth d) visual detection e) none of the...
3.Consider a galvanic cell based on the reaction. Assume theses reactions are carried out in acidic...
3.Consider a galvanic cell based on the reaction. Assume theses reactions are carried out in acidic media and that all concentrations are 1M and that all partial pressures are 1 atm. a) MnO4 (ag)+ CIO3 (ag) CIO4 (ag) + Mn (aq) b) Cr (aq+ Cl2(ag) Cr O2 +CI (aq) (aq) For each the above overall reactions, answer thee following questions. identify the cathode and anode. b. Give the overall balanced equation. How many electrons are transferred? a. c. d. Calculate...
I need the answer to quetion E, thank you. Question 10. Bacterial density in a counting...
I need the answer to quetion E, thank you.
Question 10. Bacterial density in a counting chamber A scientist needs to calculate the density of a bacterial culture in order to set up an experiment, but the laboratory spectrophotometer is broken and the only alternative is to use a counting chamber that she finds in a drawer of old equipment. The counting chamber has a glass to coverslip height of 0.02 mm and the instructions say that each square of...
I need the answer to question D, thank you. Question 10. Bacterial density in a counting...
I need the answer to question D, thank you.
Question 10. Bacterial density in a counting chamber A scientist needs to calculate the density of a bacterial culture in order to set up an experiment, but the laboratory spectrophotometer is broken and the only alternative is to use a counting chamber that she finds in a drawer of old equipment. The counting chamber has a glass to coverslip height of 0.02 mm and the instructions say that each square of...
1. Cycle counting: a) means that we count all articles after a specified time period b)...
1. Cycle counting: a) means that we count all articles after a specified time period b) leads us to count A items more frequent then B items c) require all A items to be counted the same day d) is a legal requirement 2. Extra units in inventory to help reduce stockouts are called: a) reorder point. b) safety stock. c) just-in-time inventory. d) all of the above. 3. The EOQ model is a) not very useful in practice since...
When the following redox reaction is carried out in a voltaic cell, the standard cell potential,...
When the following redox reaction is carried out in a voltaic cell, the standard cell potential, E°cell, is 0.93 V. What is ΔG° for this reaction at a temperature of 298.15 K? Pb(s) + 2 Ag+(aq) → Pb2+(aq) + Ag(s) A. -180 kJ B. -90 kJ C. 90 kJ D. 180 kJ
that moves out the cell The sodium-potassium pump is an A. Enzyme ATP B. Enzyme, sodium...
that moves out the cell The sodium-potassium pump is an A. Enzyme ATP B. Enzyme, sodium C. Peripheral protein sodium D. Peripheral protein potassium E. All of the above reactions Activation energy is required for A. Anabolic B. Catabolic C. A&B D. None of the above In which environment would an organism benefit from having a high concentration of unsaturated lipids in the cell membrane? A. Extreme cold temperatures B. Extreme hot temperature C. Dry Conditions D. Wet conditions E....
Hemocytometer Cell Count Calculation
Hemocytometer Cell Count Calculation1,2,3,4 = WBC Counting Squares. Each has a volume of 0.1ul. A,B,C,D,E = RBC Counting Squares. Each has a volume of 0.004ul. Diluting fluid used (Isoton, spinal diluting fluid, methlene blue, etc) Amount of specimen) (Amount of diluent) Dilution Factor Total # of Squares Counted _______ Size of squares counted (Circle one): Large (0.1) WBC or Small (0.004) RBC
can anyone please help me answer these 3 biology
questions?
20. The plate count method allows direct count of total cells growing on solid medium. A. True B. False 21. Which of the following is a statistical procedure for estimating the number of viable microorganisms in a sample? A. Electronic cell counting device B. Most probable number (MPN) C. Petroff-Hausser chamber D. Spectrophotometry E. Viable plate count 22. Which of the following is the most commonly used to estimate and...
98) Superoxide dismutase is an entryme involved in oxygen detoxification 99) Obligate anacrobes can't express catalase. 100) Aerotolerant bacteria express catalase Back to Multiple Choice: 101) Bacterial numbers can be obtained by a) counting them in a chamber slide b) using a coulter counter c) determining cfu by spread-plate plate counts d) optical density e) all of the above 102) The coulter counter works based on a) photons b) electron e) cell growth d) visual detection e) none of the...
3.Consider a galvanic cell based on the reaction. Assume theses reactions are carried out in acidic media and that all concentrations are 1M and that all partial pressures are 1 atm. a) MnO4 (ag)+ CIO3 (ag) CIO4 (ag) + Mn (aq) b) Cr (aq+ Cl2(ag) Cr O2 +CI (aq) (aq) For each the above overall reactions, answer thee following questions. identify the cathode and anode. b. Give the overall balanced equation. How many electrons are transferred? a. c. d. Calculate...
I need the answer to quetion E, thank you.
Question 10. Bacterial density in a counting chamber A scientist needs to calculate the density of a bacterial culture in order to set up an experiment, but the laboratory spectrophotometer is broken and the only alternative is to use a counting chamber that she finds in a drawer of old equipment. The counting chamber has a glass to coverslip height of 0.02 mm and the instructions say that each square of...
I need the answer to question D, thank you.
Question 10. Bacterial density in a counting chamber A scientist needs to calculate the density of a bacterial culture in order to set up an experiment, but the laboratory spectrophotometer is broken and the only alternative is to use a counting chamber that she finds in a drawer of old equipment. The counting chamber has a glass to coverslip height of 0.02 mm and the instructions say that each square of...
that moves out the cell The sodium-potassium pump is an A. Enzyme ATP B. Enzyme, sodium C. Peripheral protein sodium D. Peripheral protein potassium E. All of the above reactions Activation energy is required for A. Anabolic B. Catabolic C. A&B D. None of the above In which environment would an organism benefit from having a high concentration of unsaturated lipids in the cell membrane? A. Extreme cold temperatures B. Extreme hot temperature C. Dry Conditions D. Wet conditions E....
Hemocytometer Cell Count Calculation1,2,3,4 = WBC Counting Squares. Each has a volume of 0.1ul. A,B,C,D,E = RBC Counting Squares. Each has a volume of 0.004ul. Diluting fluid used (Isoton, spinal diluting fluid, methlene blue, etc) Amount of specimen) (Amount of diluent) Dilution Factor Total # of Squares Counted _______ Size of squares counted (Circle one): Large (0.1) WBC or Small (0.004) RBC
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