Practice Questions

TLS Online TPP Program

#Question id: 8717

Molecular clocks are more reliable when ________.

#XL - S Microbiology

the surrounding pH is close to 7.0
most mutations of highly conserved DNA sequences should have no functional effect
the DNA codes for amino acid sequences whose side groups (or R groups) have a neutral pH
a significant proportion of mutations are not acted upon by natural selection

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TLS Online TPP Program

#Question id: 663

#XL - Q Biochemistry

________ is a technique used to analyze the macromolecular structure of proteins in solution.

TLS Online TPP Program

#Question id: 664

#XL - Q Biochemistry

Which is evidence that structures for proteins determined by X-ray crystallography represent the structures in solution?

TLS Online TPP Program

#Question id: 665

#XL - Q Biochemistry

Which statement is not true about the peptide bond?

TLS Online TPP Program

#Question id: 666

#XL - Q Biochemistry

Nearly all peptide bonds are in the trans configuration because

TLS Online TPP Program

#Question id: 668

#XL - Q Biochemistry

What feature does a Ramachandran plot display?

TLS Online TPP Program

#Question id: 669

#XL - Q Biochemistry

Ramachandran determined the ʺallowedʺ values of the phi and psi angles primarily by considering ________.