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1. Could an organism be both MR and VP negative? Explain please
2. Any organism that uses the Krebs cycle can use citrate and most organisms have the enzymes for the Krebs cycle. Why then do so many organisms test Citrate negative with the citrate test?
One of these three markers has to have a special property that is not needed in the other two markers. What is this property, which of the three markers possesses it, and why is this important?
One process that is considered very important to the health of coral reef ecosystems (and that may be currently under stress) is their connectedness to surrounding systems.
All known human cancers have been demonstrated to be caused by viruses, You have been asked to design a virus that causes cancer in humans. Which of the following cellular functions would this virus have to possess to cause a tumor (select all that..
What were the components of the pectoral girdle in early fishes and how has it changed in tetrapods? Specifically, what is the typical fate of the coracoids and clavicle in the tetrapod girdle?
The ion gradients maintained across the plasma membranes of most cells play a significant role in cellular energetics. Ion gradients are often either generated by the hydrolysis of ATP or used to make ATP by the phosphorylation of ADP.
Mitochondria carrying out oxidative phosphorylation consume oxygen. What happens to oxygen in mitochondria?Describe the effect of an uncoupling agent such as 2,4-dinitrophenol on the rate of oxygen consumption.
In the absence of oxygen, cells consume glucose at a high, steady rate. When oxygen is added, glucose consumption drops precipitously and is then maintained at the lower rate. Why is glucose consumed at a high rate in the absence of oxygen and at ..
Through fruit fly studies, geneticists have discovered a segment of DNA called the homeobox which appears to control: a. Sex development in the flies b. Life span in the flies c. Final body plan development in the flies.
Suppose you were to count one coliform colony produced from a 10 ml water sample. What is the coliform density of the water in cells per 10 ml? Is the water potable? Explain.
What is the pK of the weak acid HA if a solution containing 0.1M HA and 0.2M A has a pH of 6.5?
Which of the following is a difference between plants and fungi?
In eukaryotic cells, the electrons donated by NADH and FADH2 are transported along electron carriers in the
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