TLS Online TPP Program

#Question id: 2043


Which of the following statements is TRUE of antigenic competition?

#XL - S Microbiology
  1. Antigenic competition involves competition between T-cell epitopes for the MHC groove

  2. Antigenic competition is initiated at the pre-T cell stage

  3. Antigenic competition is unrelated to the concept of dominant and subdominant epitopes

  4. Antigenic competition can only occur with cryptic epitopes

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TLS Online TPP Program

#Question id: 11286

#XL - R Botany

Consumption, assimilation, and production efficiencies are measures of ecological efficiency. Following some statements are correct?

(A) Consumption efficiencies for carnivores are typically higher than those of herbivores

(B) Assimilation efficiencies of herbivore are often less than consumption efficiencies

(C) Vertebrates tend to have lower production efficiencies than invertebrates

TLS Online TPP Program

#Question id: 766

#XL - Q Biochemistry

With respect to microRNAs, which, if any, of the following statements, is true?

TLS Online TPP Program

#Question id: 27464

#XL - R Botany

Liverworts are closely related to___

TLS Online TPP Program

#Question id: 11406

#XL - R Botany

Which of the following is true for a critically endangered species?

TLS Online TPP Program

#Question id: 10347

#XL - Q Biochemistry

NH4+ is toxic to plants, inhibit dinitrogenase and also interfere energy metabolism by dissociating ATP formation  from ETC  in both mitochondria and chloroplasts. What will plant cells do to avoid this problem?

a) Plant cells avoid ammonium toxicity by rapidly converting the ammonium generated from nitrate assimilation or photorespiration into nitrate

b) Plant cells avoid ammonium toxicity by rapidly converting the ammonium generated from nitrate assimilation or photorespiration into amino acids

c) The pathway for this conversion involves the sequential actions of glutamine synthetase (GS) and glutamate synthase (GOGAT)

d) The pathway for this conversion involves the sequential actions of Aspartate aminotransferase (Asp-AT) and Asparagine synthetase (AS)

Which of the above statements is incorrect?