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TLS Online TPP Program

#Question id: 2002

What accounts for antibody switching (i.e., the switch of one B cell from producing one class of antibody to another antibody class that is responsive to the same antigen)?

#Section 2: General Biology

  1. the shuffling of exons for one C region type to another attached to the V-J transcript

  2. the rearrangement of V region genes in that clone of responsive B cells

  3. a switch in the kind of antigen-presenting cell that is involved in the immune response

  4. a patientʹs reaction to the first kind of antibody made by the plasma cells

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TLS Online TPP Program

#Question id: 1321

#Section 3: Genetics, Cellular and Molecular Biology

Gap junction allows exchange of
TLS Online TPP Program

#Question id: 3553

#Section 3: Genetics, Cellular and Molecular Biology

Diploid cell genotype AaBb undergoes meiosis that generates new combinations of alleles by which mechanism when gene A and B located on the same chromosome?  
TLS Online TPP Program

#Question id: 17918

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Match the items in Group 1 with an appropriate description in Group 2

Group 1                                                   Group 2
P. PSI-BLAST                                   1. Protein sequence database
Q. CLUSTALW                                  2. Profiles
R. SWISS-PROT                              3. Needleman-wunsh algorithm
S. Global alignment                         4. Multiple sequence alignment
TLS Online TPP Program

#Question id: 27228

#Section 3: Genetics, Cellular and Molecular Biology

The structure of RNA differs from that of DNA, as RNA contains:
TLS Online TPP Program

#Question id: 9583

#Section 2: General Biology

 A mechanism known as the Q cycle accounts for most of the observations in which structure and reactions of plastoquinone that operate in,