Blog

50.   Which of the following is an indirect method for estimating the number of microbes in a sample?

Theodor W. Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different segments of algae to different wavelengths of light. He added aerobic bacteria and then noted in which areas the bacteria congregated. He noted that the largest groups were found in the areas illuminated by the red and blue light. An outcome of this experiment was to help determine the relationship between

The lipid ______________________________ is found in the membranes of eukaryotic cells.  This lipid helps to keep membranes fluid when the temperature gets colder.

Some pig’s blood (pig red blood cells have 0.5 mM saline [salt water]) is placed on a slide. You add 10 mM saline on the pig red blood cells on the slide. Predict what the pig blood cells may look like under the microscope.

____________________________ are stacks of membrane sacs in chloroplasts.

Some pig’s blood (pig red blood cells have 0.5 mM saline [salt water]) is placed on a slide. You add 10 mM saline on the pig red blood cells on the slide. Predict what the pig blood cells may look like under the microscope.

Endergonic reactions are not spontaneous because their products have a higher free energy than their reactants. 

Which of the following does not use a protein to transport molecules across the cell membrane?

A rabbit cell is placed in a beaker of pure water.  The  beaker water is considered _________________________ as compared to the solution inside the rabbit cell. 

Endergonic reactions are not spontaneous because their products have a higher free energy than their reactants.