Question
In an experiment designed to study intracellular digestion in Paramecium, yeast cells are stained with Congo red, a pH-sensitive dye. After ingestion, the food vacuole changes colour from red to green. What does this observation most accurately indicate?
Asked in UP PGT (Biology) · 2026
Biological Classification · Biology
Exam PYQ4 Options
Quick Revision
Chlorophyll absorbs light energy mainly in the blue and red regions.
Correct AnswerCorrect option for this question
Learn Biological Classification in 60 Seconds
Revise Fungi: Structure, Types & Economic Importance through a concise concept video designed for fast competitive-exam preparation.
Everything you need to learn, practice & excel — in one place.
3,000+ Video-Based Study Material
PYQ-Based Quizzes
4,000+ Informative Audiobooks
6,300+ Full-Length Mock Tests
Daily Current Affairs
40,000+ PYQs
Questions Asked from Fungi: Structure, Types & Economic Importance in Previous Exams
See how often Fungi: Structure, Types & Economic Importance has appeared in previous-year questions across major government exams.
9UPSC Questions Asked in These Years:2010, 2011, 2012, 2013, 2016, 2018, 2021, 2022, 2023
10SSC Questions Asked in These Years:2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
8Railways Questions Asked in These Years:2016, 2018, 2020, 2021, 2022, 2024, 2025, 2026
15State PSC Questions Asked in These Years:2004, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
Fungi: Structure, Types & Economic Importance has appeared in 42 previous-year exam questions, most frequently in State PSC, SSC and UPSC.
2-Minute Revision Notes
Revise Biological Classification and Its Related Concepts
Strengthen key concepts with exam-focused visual notes for faster revision.
Explore More Questions
Continue practising by chapter, topic and related subjects.
One question solved. Keep going.
Continue with the next Diversity in The Living World question and build your accuracy one question at a time.