Practice Questions

TLS Online TPP Program

#Question id: 11499

Biologists have long been aware that the defunct kingdom Protista is paraphyletic. Which of these statements is both true and consistent with this conclusion?

#XL - S Microbiology

Many species within this kingdom were once classified as monerans.
Animals, plants, and fungi arose from different protist ancestors.
The eukaryotic condition has evolved only once among the protists, and all eukaryotes are descendants of that first eukaryotic cell.
Some protists, all animals, and all fungi share a protist common ancestor, but these protists, animals, and fungi are currently assigned to three different kingdoms.

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TLS Online TPP Program

#Question id: 683

#XL - Q Biochemistry

Which factor does not help to explain why many proteins exhibit quaternary structure?

TLS Online TPP Program

#Question id: 684

#XL - Q Biochemistry

Protein subunits in a multisubunit protein are held to each other primarily by

TLS Online TPP Program

#Question id: 685

#XL - Q Biochemistry

A protein has a molecular weight of 5600 daltons; its subunits are about 1960 daltons. There are ________ protein chains per oligomer.

TLS Online TPP Program

#Question id: 686

#XL - Q Biochemistry

Which is not an example of an oligomeric protein?

TLS Online TPP Program

#Question id: 687

#XL - Q Biochemistry

All of the following are considered “weak” interactions in proteins, except:

TLS Online TPP Program

#Question id: 688

#XL - Q Biochemistry

Pauling and Corey’s studies of the peptide bond showed that: