NEET BIOLOGY

Detailed explanation-1: -Proteins have numerous functions within living things, including the following: They help form many of the structural features of the body including hair, nails and muscles. Proteins are a major structural component of cells and cell membranes.

Detailed explanation-2: -The fundamental building blocks of all cell membranes are phospholipids, which are amphipathic molecules, consisting of two hydrophobic fatty acid chains linked to a phosphate-containing hydrophilic head group (see Figure 2.7).

Detailed explanation-3: -Proteins are the primary building materials of the body. Your hair, skin, muscles, and organs are composed mostly of proteins. Proteins are strong yet flexible, and they have a complex 3-D structure. Amino acids are the basic building blocks of proteins.

Detailed explanation-4: -Proteins themselves are major structural elements of cells. They also serve as transporters, moving nutrients and other molecules in and out of cells, and as enzymes and catalysts for the vast majority of chemical reactions that take place in living organisms.

Detailed explanation-5: -The plasma membrane is made up primarily of a bilayer of phospholipids with embedded proteins, carbohydrates, glycolipids, and glycoproteins, and, in animal cells, cholesterol.