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TLS Online TPP Program

#Question id: 8717

Molecular clocks are more reliable when ________.

#XL - S Microbiology
  1. the surrounding pH is close to 7.0
  2. most mutations of highly conserved DNA sequences should have no functional effect
  3. the DNA codes for amino acid sequences whose side groups (or R groups) have a neutral pH
  4. a significant proportion of mutations are not acted upon by natural selection
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TLS Online TPP Program

#Question id: 3862

#XL - Q Biochemistry

The largest gene characterized to date is:
TLS Online TPP Program

#Question id: 3863

#XL - Q Biochemistry

Introns in nuclear pre-mRNAs are excised by:
TLS Online TPP Program

#Question id: 3868

#XL - Q Biochemistry

The sigma factor of E. coli RNA polymerase: 
TLS Online TPP Program

#Question id: 3879

#XL - Q Biochemistry

Which of the following is not usually essential for the catalytic activity of ribozymes?
TLS Online TPP Program

#Question id: 3880

#XL - Q Biochemistry

Which one of the following properties of the L-19 IVS ribozyme is not shared with enzymes that are purely protein?
TLS Online TPP Program

#Question id: 3882

#XL - Q Biochemistry

The reverse transcriptase of an animal RNA virus catalyzes: