Question

42. The diagram shown below graphically describes the cellular events following the interact one particular type of signaling molecule with a target cell. What type of signaling molecu (the pentagon shape in the diagram)? External signal Target cell receptor nucleus

Answer 1

Answer- Steroid hormone

The steroid hormone receptor are intracellular receptors (present in cytoplasm and nucleus) .When hormones bind with the receptors and forms the hormone-receptor complex in the cytoplasm.The hormone-receptor complex binds on to the chromatin and mRNA transcription activation occurs in nucleus.The protein hormones binds to the plasma membrane receptors, so this option is wrong,here in picture receptor is present in cytoplasm.The cytokine receptors are cell surface glycoproteins and elicit cytokine signaling. Growth factor receptors are present at the trans membrane, catecholamines receptors are plasma membrane receptors.