Answer:
B. The smaller DNA pieces travel farthest towards the positive end of the box
Explanation:
Gel-electrophoresis technique is a technique which is used to separate the fragments of DNA based on their size. The technique is employed in the DNA fingerprint analysis.
The DNA samples are loaded on one side of the gel and when an electric current is applied, the DNA moves from the wells towards the electrodes.
The DNA is a negatively charged molecule which travels through pores in the gel and reaches towards the electrode with positive charge.
The smaller the size of the DNA fragment, the faster it moves.
Thus, Option-B is correct.
The electrolytes present in our body should be in the right concentration. This is said to be electrolyte balance.
Why does an electrolyte imbalance occur?
Electrolyte imbalance is caused when the body fluids are present in large amount. When we sweat or vomit more, it can be due to the lower level of some electrolytes. So, it is necessary that the electrolytes should be in proper proportion.
Electrolytes plays a very important role in our body. It helps in regulation of fluids present in blood and blood plasma, normalizes the pH of blood, allows the contraction of muscles and so on. For all these necessary roles to occur, our electrolytes should be in proper concentration. This is called electrolyte balance.
To know more about electrolyte balance, click the following link
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<span>The part of female reproductive system that is responsible for the nourishment, holding and protection of the embryo or fetus is the uterus, also known as the womb. It also provides support to the bladder, pelvic bones and other organs. </span>
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