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Describe a well-controlled experiment to determine if the rise in internal free calcium observed in the cytoplasm of unfertilized sea urchin eggs in the presence of A23187 is due to in flux of calcium from seawater. Include experimental treatments, controls, and briefly describe experimental methods.
Note: As mentioned in the lab manual, the calcium concentration in seawater is 10mM while the concentration in unfertilized egg cytoplam is greater that 10-6 M. Immediately after fertilization or in unfertilized eggs treated with A23187 the internal calcium concentration increases.
as there is no blocking proline by either the Arg or Lys. I am stumped--what am I missing.
Upon completion of genome sequencing projects, how do scientists usually go about asking how many genes there are in genome and where they are located.
Which is the ratio of dividing cells to the total number of cells in the sample. Scientists frequently calculate mitotic index to evaluate the growth rates of different types of tissue. Which type of tissue would have a higher mitotic index, normal t..
Which declaration is NOT true about DNA replication. Replication can only begin at distinct regions known as origins of replication.
Since a doughnut contains a large quantity of energy that can become available for our metabolism when eaten, why isn't the doughnut "jumping" all over the counter or hot to the touch.
A two electron transfer reaction you are studying has a standard state standard reduction potential (Eo') on 0.137V at 37C. What is the equilibrium constant for the reaction (Keq') at 37C.
Roger has arthritis and has been taking prednisone (a glucocorticold) at prescribed levels for two months. He isn't feeling well and complains of repeated colds. He is puffy (edematous). Describe the reason for these symptoms.
It is frequently when the environment changes in some way that is unfavourable to an existing population that the organisms begin to reproduce sexually. Explain the importance of this switch from asexual to sexual reproduction.
Plasmids, which are associated with membrane proteins, depend on bacterial chromosomal DNA for replication. If the genome contains ~30,000 genes, about how many genes would be removed by a deletion of DNA that might be detected by karyotype analysis.
Generate a PowerPoint presentation of 10 to 12 slides that summarizes the processes of muscular movement, bone growth, and nerve transmission. Each process should be outlined in 2 to 4 slides. Include detailed speaker's notes that describe each proce..
Which of the criticisms would be addressed by using a swan-necked flask instead of the unsealed flask. Develop a hypothesis to consider how a decrease in precipitation on Darwin Island might affect beak size and develop a hypothesis to explain how a ..
Her breath smells like acetone and her blood glucose test out at 650mg/100ml of blood. She is in acidosis. What hormone must be administered to her and why. Where may she find such DNA.
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