Receptor tyrosine kinases (RTKs) signal through:

A Ion channels

B Autophosphorylation and activation of intracellular signaling cascades

C G-proteins only

D Direct DNA binding

✓ Correct Answer: Option B

RTKs dimerize upon ligand binding, autophosphorylate, then activate downstream pathways (RAS-MAPK, PI3K).

💡 Why is B) the correct answer?

The correct answer to the question "Receptor tyrosine kinases (RTKs) signal through:" is Option B: Autophosphorylation and activation of intracellular signaling cascades.

The other options — A) Ion channels, C) G-proteins only, D) Direct DNA binding — are incorrect for this PCAT Exam Prep question. As explained above: RTKs dimerize upon ligand binding, autophosphorylate, then activate downstream pathways (RAS-MAPK, PI3K).

📚 About This PCAT Exam Prep Practice Question

This 3-level PCAT Exam Prep question from the Biological Processes topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free PCAT Exam Prep practice test or use flashcards for spaced repetition review.

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Receptor tyrosine kinases (RTKs) signal through:

✓ Correct Answer: Option B

📚 About This PCAT Exam Prep Practice Question

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