Answer:
The correct answer to the question: Which of the following steps in transcription is most likely affected? Would be: Formation of the open complex.
Explanation:
Depending on the type of bacteria, and the different structures that form the cell, antibiotics of different kinds will seek these structures to either inhibit the cell from performing its normal activities and reproducing, or doing that plus killing it. Of the second kind, called bactericidals, like Rifamycin drugs, these accomplish their purpose precisely by inhibiting steps in the DNA to RNA transcription that will result in the production of erroneous mRNA strands, and therefore, faulty proteins. When these steps are stopped, the bacteria is unable to protect itself, or repair itself, and while the process continues, the antibiotic, in high levels, starts to also eliminate the bacterial cell. Specifically, according to research done, medication like Rifamycin will stop the transcription of DNA into RNA by binding to an RNA transcribing enzyme that is located in the channel formed by the polymerase-DNA complex. In this way, nucleotides that should be added to the mRNA chain are not added and the result that comes out will be really short chains that cannot be translated later into protein.
Answer:
All these elements: cardiac output, resistance and blood volume, are all factors that make part, and affect, blood pressure.
Blood pressure then is defined as the force excerted by blood, as it is pumped in a certain volume, from the heart, and passes through the arteries, to achieve an exchange of oxygen and nutrients, towards the tissues, and carrying out of elements of disposal from the tissues.
Cardiac output is the amount of blood that is pumped during one heartbeat, every minute, from the left ventricle towards the body. This output depends on several other elements, all of which form the blood pressure. Blood volume which is the amount of blood returned towards the heart by the veins, will fill the atria and ventricles, during a heart cycle, and then, during the heartbeat, whatever volume has filled up the left ventricle will be ejected with force towards the aorta. This force, caused both by the actual contraction of the heart muscle, and the amount of blood actually pumped from the ventricle, will generate a force against the arterial walls. It is this force, this play of physics, that will ensure the exchange of waste and nutrients to and from the tissues. But arterial walls also have a resistance, which means, they are built with tensile materials that will resist the force of the blood against them, preventing thus the walls from bursting.
This is the influence of cardiac output, resistance and blood volume on blood pressure. All of them will directly influence the blood pressure that a person has.
Answer:
B. Dilation of vessels to the digestive organs.
Explanation:
The fight or flight response causes:
Inhibition of stomach and upper-intestinal action to the point where digestion slows down or stops.
Dilation of blood vessels for muscles.
The doctor has to give 12 ml for 3 g of medication at a 25mg/ml ratio to the patient.
Here the doctor is giving 3 g of medication to the patient.
The concentration ratio for the medication is 25mg/ml.
Medication is given to the patient= (Amount medication)/(Concentration Ratio)
= 3/ 0.25
= 12 ml
Thus the amount to be given to the patient is 12ml with a 25mg/ ml concentration ratio.
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