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TLS Online TPP Program

#Question id: 7290

Following figure regarding to regulatory network in the Arabidopsis shoot meristem stem-cell niche.

A. The transcription factor WUS is synthesized in the cell A and moves via plasmodesmata into cell B, where one of its functions is to induce expression of the CLV3.

B. The transcription factor CLV3 is synthesized in the cell A and moves via plasmodesmata into cell B, where one of its functions is to induce expression of the WUS.

C. Secreted CLV3 protein from cell B binds to the receptor protein kinase on the surface of cell A; there, it activates a signal that represses WUS transcription.

D. Secreted WUS protein from cell B binds to the receptor protein kinase on the surface of cell A; there, it activates a signal that represses CLV3 transcription.

Which of the following combination is correct?

#XL - R Botany
  1. A and C
  2.  B and D
  3. A and D
  4. B and C
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TLS Online TPP Program

#Question id: 4615

#XL - S Microbiology

Currently, two of the living elephant species (X and Y) are placed in the genus Loxodonta, and a third surviving species (Z) is placed in the genus Elephas. Assuming this classification reflects evolutionary relatedness, which of the following is the most accurate phylogenetic tree?
TLS Online TPP Program

#Question id: 3852

#XL - Q Biochemistry

Which of the following is NOT one of the three stages of transcription?
TLS Online TPP Program

#Question id: 1737

#XL - Q Biochemistry

The carrier T-cell epitope on a thymus-dependent antigen:
TLS Online TPP Program

#Question id: 386

#XL - S Microbiology

Which of the following properties of water does not contribute to the fitness of the aqueous environment for living organisms?
TLS Online TPP Program

#Question id: 11339

#XL - Q Biochemistry

Calculate the free energy change for glucose entry into cells when the extracellular concentration is 5 mM and the intracellular concentration is 3 mM.