Which of the following is the best definition of generation time? The length of

Question

Which of the following is the best definition of generation time? The length of time it takes for lag phase. The length of time it takes for a cell to divide. The minimum rate of doubling The duration of log phase. The time it takes for nuclear division. All of the following are direct methods to measure microbial growth except Direct microscopic count Standard plate count Filtration Metabolic activity MPN Which of the following is a example of a metabolic activity that could be used to measure microbial growth? Standard plate count Glucose consumption Direct microscopic count Turbidity MPN An experiment began with 4 cells and ended with 128 cells. How many generations did the cells go through? 64 32 6 5 4 Three cells with generation times of 30 minutes are inoculated into a culture medium. How many cells are there after 5 hrs? 3 times 2^10 1024 243 48 16 Use the following choices to answer questions 6 through 7 Choices may be used once, more than once, or not at all. Catalase Oxidase Peroxidase Superoxide dismutase None of the above. Catalyzes the reaction: O^-2 + O^-2 + 2H^+ rightarrow H_2O_2 + O_2 Catalyzes the reaction: 2H_2O_2 rightarrow 2H_2O+ O_2

Explanation / Answer

1.Q..Which of the following is the best definition of generation time.

Ans...(b)..the length of time it takes for a cell to devide.

2.Q...All of the following are direct methods to measure microbial growth except.

Ans...(d)...Metabolic activitiy

3.Q..Which of the following is an example of a metabolic activity that could be used to measure
microbial growth.

Ans...(b)..Glucose Consumption.

4.Q..An experiment began with 4 cells and ended with 128 cells. How many generations did the
cells go through.

Ans....(d)...5

5.Q...Three cells with generation times of 30 minutes are inoculated into a culture medium.How many cells
are there after 5 hours.

Ans...(a)

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