Answer:
DNA molecules are composed of four nucleotides, and these nucleotides are linked together much like the words in a sentence. Together, all of the DNA "sentences" within a cell contain the instructions for building the proteins and other molecules that the cell needs to carry out its daily work.
Explanation:
A strand of DNA is much like an extremely long sentence that uses only four letters. DNA actually has two strands, much like a zipper and the nucleotides are like the teeth of that zipper. This two-strand system is the key to how DNA is able to make copies of itself.
Answer:
The heat transferred to the system is 1717.322 J
Explanation:
Given data:
n = moles of gas = 1 mol
T = temperature = 25°C = 298 K
Question: Calculate the heat transferred, Q = ?
(volume doubles due the gas expasion)
The heat transferred:
Here
R = ideal gas constant = 8.314 J/mol K
it contains ionic bonds and has high melting point
Answer:
31
Explanation:
In order for an atom to have a neutral charge, it needs to have the same number of protons and electrons. You can see by the illustration that the atomic number is 31, so this element has 31 protons. Knowing that, we also know that it must have 31 electrons to be neutral.
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