Which statement correctly identifies a difference in the structure of proteins and carbohydrates?
The statement “only proteins are formed from amino acids joined together by peptide bonds” correctly identifies a difference in the structure of proteins and polysaccharides. Polysaccharide is a carbohydrate (e.g., starch, cellulose, or glycogen) whose molecules consist of a number of sugar molecules bonded together.
What’s the difference in the structure of proteins and polysaccharides?
Proteins and polysaccharides are polymers. Only proteins are formed from amino acids joined by peptide bonds. Only polysaccharides can be folded and twisted to very specific shapes. Only proteins can be large molecules with thousands of subunits.
What do polysaccharides and proteins have in common?
Answer. Polysaccharides are composed of shorter units called monosaccharides. All of these three things, polysaccharides, nucleic acids and proteins have many things in common like being made of monomers and associated with DNA as well as sugar in some sort.
Are proteins polypeptides?
Proteins are formed from one or more polypeptides joined together. In fact, some researchers use the term peptide to refer specifically to oligopeptides, or otherwise relatively short amino acid chains, with the term polypeptide being used to describe proteins, or chains of 50 or more amino acids.
What is the difference between proteins and polypeptides?
A peptide is two or more amino acids joined together by peptide bonds, and a polypeptide is a chain of many amino acids. A protein contains one or more polypeptides. Therefore, proteins are long chains of amino acids held together by peptide bonds.
What do proteins do inside cells?
Proteins are a class of macromolecules that perform a diverse range of functions for the cell. They help in metabolism by providing structural support and by acting as enzymes, carriers, or hormones. The building blocks of proteins (monomers) are amino acids.
How do cells produce proteins?
The information to produce a protein is encoded in the cell’s DNA. When a protein is produced, a copy of the DNA is made (called mRNA) and this copy is transported to a ribosome. Ribosomes read the information in the mRNA and use that information to assemble amino acids into a protein.