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It has been conclusively demonstrated that related cells can differ in their metabolic activities under various conditions. For instance, transformed cells (on their way to becoming cancerous) have more active mitochondria than do their non-transformed counterparts. TO obtain clones that differ in the level of metabolic activity associated with their mitochondria, you first treat cells in culture with a chemical mutagen.
a) Suggest an assay that could distinguish between mutants with above-normal mitochondrial metabolic activity and those with below-normal mitochondrial metabolic activity.
b) Suggest a procedure to select for mutants with above-normal mitochondrial activity.
Normal red blood cells are due to a dominant gene (b); sickle cell anemia to its recessive allele (b). In this problem a person who is a carrier of sickle cell anemia is considered to have normal red blood cells.
An electric field with a magnitude of 170 N/C exists at a spot that is 0.11 m away from a charge. At a place that is 0.36 m away from this charge, what is electric field strength.
Why might people question the ethics of IVF? Why might those concerns be unfounded? List relevant facts and significant unknowns, separating subjective from objective information. Identify credible sources with at least two distinct viewpoints on ..
What is a fitness function? Describe how you can use a fitness function to: 1) determine whether an allele is dominant, co-dominant, or recessive AND beneficial, deleterious, neutral, or experiencing some other form of selection, and 2) predict th..
A mutation in a DNA repair pathway makes the mutant strain highly susceptible to Nitrous acid (see above for hint) and to the depurinating agent Aflatoxin.
Discuss how research might address these gaps. Focus on biological or public health hypotheses rather than study designs or logistics.
What properties of fibronectin and other similar molecules of the extracellular matrix (ECM) allow them to fulfill their function of integrating the interactions between the ECM and cells? Please explain fully.
What is the difference between octopuses and mussels regarding their circulatory systems? How does that difference influence the mobility of these animals?
If you were to remove the ER retrieval signal (KDEL) from protein disulfide isomerase (PDI), which is normally a soluble resident of the ER lumen, where would you expect the modified PDI to be located?
describe the 5 steps in respiration/metabolism of glucose, address glycolysis, trasition reaction, kreb's cycle, electron transport and chemiosmosis.
What is the maximum number of codons that could be present in an mRNA transcript that consists of 1200 nucleotides?
The chance that a baby will be a girl is 1/2 and the chance of having a boy is also 1/2. If a certain family has three boys, what is the chance that their next child will be a girl? Explain your answer.
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