Which of the following protein structures describes a 3D structure of one polypeptide chain?

List as many different categories of protein functions as you can. Wherever possible, give an example of each category.

Why are misfolded proteins a potential problem for the eukaryotic cell, and how do cells combat the accumulation of misfolded proteins?

How does an enzyme function? Why are enzymes essential for living organisms on Earth?

Exon shuffling is a proposal that relates exons in DNA to the repositioning of functional domains in proteins. What evidence exists in support of exon shuffling?

Which of the following describes the amino acid sequence of a polypeptide chain?

Which of the following describes the 3D structure of multiple polypeptide chains in a single protein?

Which of the following describes the local structures formed in a single polypeptide chain?

Some proteins are composed of two or more polypeptides. Suppose the DNA template strand sequence 3′-TACGTAGGCTAACGGAGTAAGCTAACT-5′ produces a polypeptide that joins in pairs to form a functional protein.

What term is used to identify a functional protein like this one formed when two identical polypeptides join together?