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TLS Online TPP Program

#Question id: 15281

What is morphogen?

#Unit 5. Developmental Biology
  1. a diffusable biochemical molecule that can determine the fate of a cell by its concentration..
  2. a non-diffusable biochemical molecule that can determine the fate of a cell by its concentration.
  3. a non-diffusable biochemical molecule that can determine the fate of a cell by its localization.
  4. a diffusable biochemical molecule that can determine the fate of a cell by its localized position.
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TLS Online TPP Program

#Question id: 4171

#Unit 3. Fundamental Processes

Use the table below to determine which template strand DNA sequence (written in the 5ʹ → 3ʹm direction) specifies the tripeptide with the sequence gly-ala-leu.
TLS Online TPP Program

#Question id: 24235

#Unit 4. Cell Communication and Cell Signaling

In cultured cells, which of the following mutation in the EC5 domain of CDHR3 increases the cell-surface expression of CDHR3 and the binding and replication of RV-C?
TLS Online TPP Program

#Question id: 14805

#Unit 4. Cell Communication and Cell Signaling

Secondary immune response to a hapten depends on the: 
TLS Online TPP Program

#Question id: 2510

#Unit 2. Cellular Organization

Which of the following cytoskeletal components is not found in all eukaryotic cells?
TLS Online TPP Program

#Question id: 10866

#Unit 10. Ecological Principles

A form of competition, found in desert shrubs and sponges, in which one organism releases a chemical into the environment that inhibits another, is referred to as