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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: 15407

#XL - S Microbiology

The end result of F factor mediated conjugation:
TLS Online TPP Program

#Question id: 15408

#XL - S Microbiology

Which of the following is not a protein or group of proteins required for conjugation to occur?
TLS Online TPP Program

#Question id: 15409

#XL - S Microbiology

 A heterozygous trihybrid corn plant is testcrossed and the following progeny are produced (all traits are recessive to their wildtype alternative);
          booster                              6
          booster, silkless                  137       
          booster, liguleless, silkless      291
          liguleless                          142
          liguleless, silkless                  3
          silkless                            30
          booster, liguleless                  34
          wildtype                            339
What is the order of the loci on the chromosome? 
TLS Online TPP Program

#Question id: 15446

#XL - S Microbiology

Hyper IgM syndrome caused by mutation in?
TLS Online TPP Program

#Question id: 15448

#XL - S Microbiology

Stimulation of a single B cell would result in the generation of a clone of cells having_____
TLS Online TPP Program

#Question id: 15449

#XL - S Microbiology

Class switch recombination of B-cell that is generated upon recognition of protein antigens and requires the participation of_____