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NEET Sample Paper NEET Sample Test Paper-90

  • question_answer
    Which of the following is the first thing that happens when a signal molecule acts on a target cell?

    A) A transcription factor acts on the DNA.

    B) The signal molecule binds to RNA.

    C) A new protein is made in the target cell.

    D)  The signal molecule binds to a receptor.

    Correct Answer: D

    Solution :

    [d] The first effect of any signal molecule must involve the binding of the molecule to a receptor.


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