Here's a breakdown:

* Guanosine: A nucleoside composed of guanine (a purine base) and ribose (a sugar).

* Triphosphate: Three phosphate groups attached to the ribose sugar.

Function of GTP:

GTP is an important molecule with various roles in cellular processes:

* Energy source: Similar to ATP, GTP carries and transfers energy in cells. It's involved in processes like protein synthesis, DNA replication, and signal transduction.

* Signal transduction: GTP acts as a signaling molecule in pathways involving G-proteins. It binds to G-proteins and activates them, triggering downstream signaling cascades.

* Ribosome function: GTP participates in the elongation step of protein synthesis, where it's used for translocation of tRNA and mRNA on the ribosome.

Key points to remember:

* GTP is a high-energy molecule similar to ATP.

* It plays a critical role in energy transfer and signaling pathways.

* It's involved in various cellular processes including protein synthesis, DNA replication, and signal transduction.

Let me know if you have any other questions.