Explain why is important for hydrogen bonds to be weak bonds instead of very strong bonds.

Hydrogen bonds are classified as weak because they are formed fast, but they also break easily under normal biological conditions.

Weak bonds can be easily broken, but this is extremely important because they are in bold in biological systems. For example, they help to decide and stabilize the shapes of water molecules.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.