Apentix/AP Biology/Unit 2: Cell Structure and Function/Question
AP Biologymediummcq1 pt

Transport vesicles bud from the Golgi carrying many different cargoes, yet each fuses only with its correct target membrane. Which molecules provide this address specificity?

A.Sugar groups displayed on the vesicle exterior that repel wrong targets
B.Aquaporins that open only when the correct destination is reached
C.Complementary v-SNARE and t-SNARE proteins whose pairing permits fusion
D.Motor proteins that walk vesicles along exactly one track

Explanation

Core Concept

Vesicle targeting and fusion are coordinated by several interacting systems. Rab GTPases and tethering factors help specify target recognition and docking, while cognate SNARE proteins assemble into complexes that drive close membrane apposition and fusion. The original explanation gave SNAREs too much sole responsibility for 'address specificity.' These molecular trafficking details are useful enrichment rather than current AP-core content.

Correct Answer

CComplementary v-SNARE and t-SNARE proteins whose pairing permits fusion

More Unit 2: Cell Structure and Function practice questions

Try a random question →

Practice more AP Biology questions with full explanations

Practice Unit 2: Cell Structure and Function Questions →