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TLS Online TPP Program

#Question id: 1704

The single best unique description of the interaction of the αβ T-cell receptor with peptide-MHC is that it:

#SCPH01 Biochemistry

  1. Involves non-covalent forces

  2. Results in T-cell activation

  3. Requires the peptide to be presented by MHC class I

  4. Involves CDR (complementarity-determining region) binding to both peptide and MHC

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TLS Online TPP Program

#Question id: 8922

#SCPH06 I Botany

Which statement is most consistent with the hypothesis that the Cambrian explosion was caused by the rise of predator-prey relationships?
TLS Online TPP Program

#Question id: 65

#SCPH06 I Botany

Identify which of the following pair is enantiomers, diastereomers or meso compounds.
TLS Online TPP Program

#Question id: 3286

#SCPH06 I Botany

 In a human population, the gene frequencies of the alleles for the ABO system are as follows:

A = 29%                         B = 7%                                    0=64%

Assuming complete random mating and Hardy-Weinberg equilibrium,

What are the blood type A frequencies in this population?
TLS Online TPP Program

#Question id: 1400

#SCPH06 I Botany

Which property is shared by malignant tumor cells and transformed cells in culture?

a. reduced growth factor requirement                        b. attachment-dependent growth

c. loss of actin microfilaments                                    d. altered morphology
TLS Online TPP Program

#Question id: 6989

#SCPH28 | Zoology

Adult human bone: