What does a protein molecule look like?

Answer 1

In a way the question has no answer. Peptide bonds don't "look like" anything, because they're smaller than wavelengths of visible light.

Structurally, they're formed when an amine reacts with a carboxylic acid. The amine group loses a hydrogen, the carboxylic acid group loses a hydroxyl ion, and the carbon and the nitrogen join. Unfortunately, it's not really feasible to draw the structure here, but any biochemistry book should provide examples.

Answer 2

A protein molecule is a long chain of amino acids folded into a complex three-dimensional structure. This structure can vary widely depending on the protein's specific function and can range from simple to highly complex shapes. Visualizing a protein structure can often involve using computer modeling or techniques like X-ray crystallography.

Answer 3

Protein molecules look differently from one another. It really depends on the cell and what kind of protein molecule they need to perform certain functions.