Quick Answer: What Does Polypeptide Mean In Biology?

Polypeptide (biology definition): a polymer of amino acids joined together by peptide bonds. Etymology: Greek polýs (many) + peptide. Larger polypeptides or more than one polypeptide that occur together are referred to as proteins.

What is a polypeptide simple definition?

Polypeptide: A peptide consisting of 2 or more amino acids. Amino acids make up polypeptides which, in turn, make up proteins.

What is polypeptide with example?

Peptides act as structural components of cells and tissues, hormones, toxins, antibiotics, and enzymes. Examples of peptides include the hormone oxytocin, glutathione (stimulates tissue growth), melittin (honey bee venom), the pancreatic hormone insulin, and glucagon (a hyperglycemic factor).

What is a polypeptide chain biology?

a sequence of AMINO ACIDS joined together by PEPTIDE BONDS, forming a PROTEIN, the sequence being determined by the order of bases along the POLYNUCLEOTIDE CHAINS of DNA, in the form of a GENETIC CODE.

Why is a protein called a polypeptide?

Proteins are called as polypeptides because they consist of large number of α-amino acids that are linked together into a long chain by means of peptide linkages. A polypeptide with more than hundred ά-amino acid residues having molecular weight greater than 10,000 is called a protein.

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What’s another name for polypeptide?

Another name for polypetide is protein. Proteins are a very important class of biological molecules.

Why is the word polypeptide not synonymous with the word protein?

Technically, a polypeptide is a string of covalently bonded amino acids which are not folded into any specific structure – whereas a protein is a string of covalently bonded amino acids that has folded into its correct shape.

Which hormone is an example of a polypeptide?

Some well-known examples are insulin and endorphins. Polypeptide hormones are usually small, being derived from precursors that are ∼100 to 500 amino acids in length (Douglass et al., 1984).

What is the function of polypeptide?

Polypeptides. Polypeptides help make up proteins by bonding numerous amino acids together. Proteins are created by the bonding of two or more polypeptides, which are then folded into a specific shape for a particular protein.

What is the resulting polypeptide?

Polypeptide, which is formed by polymerization of amino acids, is a single-stranded chain. The resulting polypeptide chain forms mainly three secondary structures such as α-helix, β-sheet, and turn/coil structures through various short-range interactions, which depend on side chain of amino acid residues.

What is the difference between peptide and polypeptide?

A peptide bond forms when the amino group of one amino acid bonds to the carboxyl group of another amino acid. 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.

Is a polypeptide a protein?

Peptides are generally considered to be short chains of two or more amino acids. Meanwhile, proteins are long molecules made up of multiple peptide subunits, and are also known as polypeptides. Proteins can be digested by enzymes (other proteins) into short peptide fragments.

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What do polypeptide chains form?

Polypeptide chains are formed by dehydration between the amino group of a L-amino acid4 with the carboxyl group of another. One hundred or more amino acids are linked together with covalent peptide bonds in various specific sequences in the polypeptide chain with polypeptide chains combining to form a protein.

What is the difference between a polypeptide and a protein quizlet?

– A polypeptide is a linear chain of amino acids linked by peptide bonds. – A protein is a macromolecule that consists of one or more polypeptides folded into a conformation specified by the linear sequence of amino acids.

What is a polypeptide a sequence of?

Polypeptides are chains of amino acids. The sequence of amino acids in a polypeptide is dictated by the codons in the messenger RNA (mRNA) molecules from which the polypeptide was translated.

How does a polypeptide become a protein?

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.

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