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An average count of 42 cells/mm2 grid is counted in a hemacytometer for a 2.5 ml suspension of cells. (Show your calculations!) a. What is the cell concentration of the suspension? b. Approximately how many cells are in the entire sample? c. To perform an experiment, 8 dishes of cells with 1.2 x 105 cells per dish are needed. How many ml of the suspension will be needed for the experiment? Are there enough cells? d. How many cells would have to be actually added to a plate (this is usually called "seeded") to begin a culture with 3.5 x 105 cells/dish, if the line of cells is known to have a plating efficiency of 65%? (Show your calculations!)
Which of the following statements best describes the structure of RNA molecules in general?
Biotechnology allows us to employ living organisms or their processes for human needs or purposes. Research how biotechnology is used today. Discuss one use of biotechnology, answering the following questions:
Another dog, Billy, has three restriction sites for this enzyme in his genome. For this problem suppose there is only one chromosome in dogs.
What phenomenon is responsible for the gene interaction in which one gene can interfere with the expression of another?
Which of the following is a general property of the minerals? Which of the following is not a known side effect of having insufficient fat stores? Which of the following sweeteners contains a significantamount of calcium? What two major nutrients are..
Which of the following is not a type of viral reproduction?
1. what are deuterostomes and protostomes and how are these concepts useful in biology? forget which opening comes
You will need polymorphic markers dispersed throughout the genome. How will you generate such a collection of polymorphic molecular markers?
gene A controls the sharpness of spines in a type of cactus. cactuses with the dominant allele, A, have sharp spines, whereas homozygous recessive aa cactuses have dull spines. at the same time, a second gene, N, determines whether cactuses have s..
What four functions are performed by nucleic acids and List the sequence of events that takes place when a DNA message is translated into protein
q1. an experiment is planned to study mechanism of sucrose uptake by plant cells. cells are immersed in a sucrose
During a cross between organisms having genotypes of AaBbCc and AaBbcc, what proportion of the offspring would be expected to be aaB_Cc?
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