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Niremberg used the enzyme polynucleotide phosphorylase to assembleRNAs with random sequences in the absence of a template. Supposethey added the enzyme to a solution of 90%CTP and 10%UTP, and thenused a cell-free system of protein synthesis to make peptidesaccording to the sequences in their synthetic RNAs.
a.) Which amino acids could possibly appear in the syntheticprotein?b.) Which would be most abundant?c.) Which would be least abundant?
Cytopathic and non-cytopathic viruses elicit very different immune responses. The primary determining factor in the type of immune response to a viral infection is which of the following (select one)?Answer
Many genes have been cloned and sequenced. The precise amino acid sequence of a polypeptide can be determined from the DNA sequence and the molecular weight can be calculated.
What are two additional drugs, treatments, or therapies thought to increase one's lifespan? What is the evidence?
Normal cells greatly slow their rates of cell division after filling culture dish with layer that is one cell deep. If a circular group of cells is removed from the middle of the filled culture dish.
What does this show about the relation between voluntary and involuntary reflex movement. If the bacteriorhodopsin molecules were randomly oriented, would you expect ATP to be synthesized? Give details about the answers.
Whilst playing lacrosse, Frank took a blow to the back of his neck. When she looked toward the stars but not directly at them, she could see them. Describe what was happening. Implicated in this is the fovea and its cells.
Which feature(s) characterize(s) meiosis from mitosis? (check all that apply)
Would you expect the measurements to be equivalent in both preparations? If a variation in size is expected, how will you account for this difference.
In supine (laying down) position, a human being's heart rate is elevated to (105 beats/min). Why? Why human being's heart rate is even more elevated to (135 beats/min) in upright (standing) position? Explain the mechanism here.
If the graph of oxygen consumption by bacteria was concave up, decreasing. Would you conclude that the organism's rate of oxygen consumption is dependent or independent of dissolved oxygen levels, in the water? EXPLAIN..
The hormone adrenalin increases cardiac output. Briefly explain the parameters that affect cardiac output and discuss how adrenalin can change these parameters.
Describe the pathway of the conduction from the atria to the ventricles and correlate this conduction with the ECG waves.
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