<h2><u>Answer</u> : </h2>
Proteins are basic nutrients comprising biomolecules, which are made up of long chains of Amino acids.
They have various functions in our body :
- they make up our hair, nails, bones etc
- they helps in recovery of damaged tissues (therefore known as body - building food)
- the structure and functions of protein depends on base sequence of nucleotides in the DNA coding for that specific protein.

Answer:
It is a very good discussion debate, although I believe that the most effective way to generate the actin head to generate such a displacement requires a good full energy currency, which is considered much better by ATP.
Regarding the information sought in 1950 (Straub), he was publishing that he could bind ATP and that during the polymerization of the protein to form microfilaments, it hydrolyzed to ADP + Pi, which remained bound to the microfilament.
Straub suggested that this reaction played a role in muscle contraction, but this is only true for smooth muscle and was not verified experimentally until 2001.
At the point where it is stated that ADP + Pi is necessary for the formation of polymers, it is extremely true and a very good posture.
What we can highlight as false in all this argument is that for muscle contraction ATP is not needed, since for it to occur if or if there must be ATP or energy currency.
Explanation:
Then we can conclude that both statements are valid with the difference that in the case of ADP + Pi it requires more evidence.
The dependant variable would be the salmon, because they depend on the water and pollution levels to give a result.
A, I believe. Because after collecting you need to analyze in order to do many other steps. Also all the other answers are something before collecting data