alleryStart learning →What is the name of the flow of hydrogen ions through the protein channel of the thylakoid membrane?
APhotorespiration
BCarbon fixation
CTranspiration
DChemiosmosis
Answer & Solution
Correct answer: D. Chemiosmosis
1. Hydrogen ions rush through an opening in the thylakoid membrane, much like water through a hole in a dam.
2. That opening is a passage through a specialised protein channel called ATP synthase.
3. The flow of hydrogen ions through it is called chemiosmosis.
4. The name fits because the ions move from high to low concentration through a semi-permeable structure.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 8 "Photosynthesis", section 8.2 The Light-Dependent Reactions of Photosynthesis_
Keep practising Photosynthesis
Browse all Photosynthesis questions for KCSE, or explore more Biology topics.
Related questions
Knock out the false leaf claimsMatch each leaf part to its jobWhy does a plant lose water during active photosynthesis?How does modern oxygenic photosynthesis differ from the older bacterial type?How many turns of the cycle are needed before a three-carbon molecule can leave to join a How many extra molecules of adenosine triphosphate are used in the regeneration reactions?Of the six molecules made after three turns of the cycle, how many leave and how many stayHow many molecules of adenosine triphosphate and NADPH are used in the reduction stage?