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Hydrogen peroxide decomposes to water and oxygen. Discuss the molecular mechanisms behind the difference in rates or activation energy of the uncatalyzed reaction, the reaction catalyzed by ferric ions, and the reaction catalyzed by the enzyme catalase. Why is the activation energy barrier essential for life as we know it? Why is it an advantage to the cell that enzymes that generate as well as break down hydrogen peroxide (catalase) are compartmentalized within the membrane-bound peroxisome?
Which reaction releases more free energy - the removal of a phosphate group from creatine phosphate or the removal of a phosphate group from ATP.
A 100 ml culture bottle is filled with LB (Lysogeny broth) which has all the nutrients and plenty of oxygen to support of oxygen to support E. coli growth. By performing serial dilutions and plate count you estimated that there are 5x10^5 cells pe..
Spiny species of diatoms are found in both warm subtropical waters and colder areas. Because warm water is less dense than cold water, would you predict any differences between the spines of warm-water and cold-water individuals? Why?
How the DNA mutation leads to the manifestation of the disease. Can the mutated DNA be removed in order to cure the disease? Why or why not?
Assume you are vegetarian, and you wish to make the case to your non-vegetarian but environmentally conscious friend that eating vegetarian is more environmentally friendly.
Identify the type of cancer you are going to research. Generally, explain what it is and what part of the body it affects.Describe the cancer in biological terms at the level of the cell and at the level of the major organ system it affects.
You want to study the effect of a mutation in your favorite gene in a cell. You do not plan to purify the gene product, just look at the mutation in vivo. What of the following would be a the best choice of a cloning vector?
A newspaper story on AIDS reports that an allele (R) confers complete resistance to HIV when homozygous and that 2% of the human population is resistant (RR).
What will happen to resting membrane potential if potassiumsuccinate were injected into the intracellular environment (cytoplasm) of a neuron? Explain.
A fundamental difference between eukaryotic viruses with DNA genomes versus those with RNA genomes is. Most eukaryal DNA viruses replicate in the host cell nucleus while most eukaryal RNA viruses replicate in the cytoplasm.
Hippogriffs can have black fur or gray fur. However, there is a high rate of mutation from black alleles into gray alleles. In a population of 1000 hippogriffs, if there are 800 alleles for black fur and the forward mutation rate (ie., from black ..
You have the amino acid sequence of a protein and wish to search for the gene encoding for this protein in a DNA library. Using this protein sequence, you deduce a particular DNA sequence that can encode for this protein.
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