AP Biology Signaling Molecules and Cellular Receptors — practice questions

Explore 2 free Signaling Molecules and Cellular Receptors questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Signaling Molecules and Cellular Receptors questions and exercises with answers

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Match each signal to how far it goesRead the answer and worked solution →Inside the cell or on the surface?Read the answer and worked solution →

Worked practice questions

Match each signal to how far it goes

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Matching pairs

Left
Paracrine signal
Right
Acts on cells that are close by
Left
Endocrine signal
Right
Travels the bloodstream to distant cells
Left
Autocrine signal
Right
Is received by the cell that sent it
Left
Gap junction
Right
Lets small molecules pass between cells
Left
Neurotransmitter
Right
Carries a signal across a chemical synapse

Instructions

Tap a signaling type, then tap the route its ligand takes to reach the target cell.

_Source: OpenStax Biology 1e, section 9.1 Signaling Molecules and Cellular Receptors_

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Inside the cell or on the surface?

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Left

Internal

Items

Item
Sits in cytoplasm
Answer
Internal
Item
Spans the membrane
Answer
Cell surface
Item
Binds steroids
Answer
Internal
Item
Ligand must enter
Answer
Internal
Item
Binds a peptide
Answer
Cell surface
Item
Ligand stays out
Answer
Cell surface
Item
Acts on DNA itself
Answer
Internal
Item
Does transduction
Answer
Cell surface

Right

Cell surface