What is the concentration of chlorophyll B if an absorbance of 1 is measured at 431nm in a cuvette with a pathlength of 1cm. (Chlorophyll B Extinction coefficient: 57.43 mM-1 cm-1)

A polluted lake contains 3 x 10' toxic Poisonum nasticum cells per milliliter. Assuming these grew logarithmically with a doubling time of 10 hr from an initial group of cells introduced to the lake, choose the equation that would calculate how many cells per milliliter were originally introduced into the lake 50 hr ago (N¡). N; = (3 x 107) / 25 cells N¡ = (3 x 107) × 210 cells Nj = (3 x 107) × 25 cells N¡ = (3 x 107) / 210 cells O None of the above are correct

Comparing the chlorophyll a and b why did chlorophyll a travel the farthest on the tlc plate ?

Suppose the pharmacists has 1.5 L of a 20X concentrate of an antibiotic and must dispense 250 mL of a 1X solution to customers. What volume of the 1X antibiotic can the pharmacist prepare? How many customers can receive the 1 X solution?

The atmospheric ratio of peroxyacetic nitric anhydride (PAN) to PAN + inorganic nitrite varies from less than 0.1 to 0.9. High values of the ratio are associated with photo chemically aged air masses, situations where precipitation has recently occurred, and situations were unusually high nighttime nitrogen oxide concentrations are found. What do these observations tell us  about the factors affecting the relative rates of formation and removal of nitrogen oxide compounds?

Create a line weaver burke plot from the following data.

DCPIP (2,6-dichlorophenol-indophenol), a blue dye, can act as an electron acceptor and becomes colorless when reduced. A suspension of chloroplasts is prepared, and DCPIP is added to the suspension. The sample is split into two test tubes. One test tube is exposed to light and the other is wrapped in foil (dark control). What would you observe over time comparing the light exposed and the dark control test tubes?   A. The sample exposed to light stays blue. The sample kept in the dark turns colorless.   B. The sample exposed to light turns colorless. The sample wrapped in foil stays blue.   C. Both samples stay blue.   D. Both samples turn colorless.

why should the ethanol/lystate boundary not be distrubed

If you have cells that are larger and contain more chlorophyll per cell than the cells shown in the following flow cytometric signature, where would you expect them to likely show up when they are run through the flow cytometer and why?  Please answer with 5 sentences/dot points minimum

Photosynthetic response curve to light for sun (solid line, N = 14) and shade leaves (dashed line, N = 21) of S.  Why in this graph do we see shaded leaves have lower values compared to light leaves as PAR is increasing?