Explanation:
Chemical reactions are represented using chemical equations that shows how reactants combined to form products.
Every chemical equation is written in compliance with the law of conservation of mass.
The law states that "in a chemical reaction, matter is neither created nor destroyed but transformed from one form to another and that mass is always conserved".
This implies that no matter what we start with, we might end up with a different product but the atoms are still intact and not lost.
Also, the starting mass is the same we must end with.
This is why every atom in the equations of photosynthesis and respiration are the same on both sides in terms of number.
Learn more:
chemical equation brainly.com/question/4216541
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Answer:
B. transporting substances in a cell
Explanation:
Endomembrane system is basically a system or organelles and membranes in eukaryotic cells, which is involved in packaging, modifying and transporting the proteins and lipids across the cell.
Many organelles and membranes play role in this system like lysosomes, endoplasmic reticulum, Golgi bodies and nuclear membrane.
Note: Chloroplasts, Mitochondria and peroxisomes are not part of endomembrane system.
You can see figure depicting endomembrane system for better understanding.
In the stomach, the enzyme pepsin has the function to break proteins into smaller units-polypeptides. Pepsin is synthesized and secreted in an inactive form- pepsinogen. Activation energy (the minimum amount of energy that is required to activate an enzyme) is achieved in the acidic medium (pH from 1 to 3). So, the activation of pepsin (conversion of pepsinogen to pepsin) is possible thanks to the cells in the stomach lining which produce hydrochloric acid (HCl), causing the stomach contents to have a low pH.
Antacids neutralize the acid made by the stomach, affecting the digestion.
