What type of large molecule is responsible for repair and growth of cells?
2 answers:
Answer:
Explanation:
Macromolecules play many important roles in the body. Let's list the functions of proteins, carbohydrates, and lipids.
Proteins:
- These molecules help with growth, building and repairing cells, transporting substances, and acting as enzymes or hormones.
Carbohydrates:
- These molecules are used for energy. They can provide quick energy, because they are easy to break down.
Lipids:
- These help store energy for later use, plus they are sometimes insulators and hormones.
Based on the information, the molecule responsible for repair and growth must be <u>protein.</u>
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Answer:
Explanation:
To solve this problem, we must understand the relationship between mass of a substance and the number of atoms.
Atoms are the smallest indivisible particles of any matter. A substance can be made up of several number of atoms in their space.
The mass of any substance is a function of the amount of atoms its contains.
The mass of a substance is related in chemistry to the amount of atoms its contains using the parameter called the number of moles.
A mole is the amount of substance that contains the Avogadro's number of particles. This number is 6.02 x 10²³ particles. The particles here can be protons, neutrons, electrons, atoms e.t.c.
Now,
Number of moles =
Molar mass of copper = 63.6g/mole
Number of moles = = 0.03mole
Since 1 mole of a substance contains 6.02 x 10²³atoms
0.03 mole of copper will contain 0.03 x 6.02 x 10²³atoms
= 1.89 x 10²² atoms
He needs to add 1.89 x 10²² atoms to make 2g of the sample.