Practice Questions

TLS Online TPP Program

#Question id: 1873

Mutations in the gene encoding which of the following most commonly results in severe combined immunodeficiency (SCID)?

#Unit 4. Cell Communication and Cell Signaling

Adenosine deaminase (ADA)
IL-7 receptor α chain
Gamma C interleukin receptor component of the interleukin-15 receptor
RAG-2 (recombination activating gene-2)

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TLS Online TPP Program

#Question id: 7311

#Unit 5. Developmental Biology

According to the ABC model of flower development in Arabidopsis, three classes of organ identity genes— designated A, B, and C— are required to specify the identity of floral organs in each whorl of a flower. If wild type Arabidopsis were transformed with a chimeric gene composed of a C class promoter fused to a B class coding sequence, which of the following arrangements (outer to inner) would be predicted?

TLS Online TPP Program

#Question id: 568

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statements about allosteric control of enzymatic activity is false?

TLS Online TPP Program

#Question id: 12312

#Unit 10. Ecological Principles

Feeding behavior with a high energy intake- to- expenditure ratio is called

TLS Online TPP Program

#Question id: 29446

#Unit 6. System Physiology – Plant

The binding of Nod factors to the Nod factor receptors (NFRs), which contain