Spot the correct spelling of an electron-transport protein.

Question

Spot the correct spelling of an electron-transport protein.

1. A. Cytocrome
2. B. Cytocrhome
3. C. Cytochrome (Correct answer)
4. D. Cytohrome

Correct Answer

Option C — Cytochrome

Detailed Solution & Explanation

The correct answer is Cytochrome.

Key Points

• The word is built from cyto- (cell) + chrome (colour), so the spelling must keep the ch of *chrome* intact.
• The distractors each damage that element — dropping the h, transposing it to rh, or omitting the c altogether.
• Cytochromes are iron-containing proteins that carry electrons along the electron transport chain.

Additional Information

• The cyto- root recurs throughout biology: cytoplasm, cytology, cytokinesis, leucocyte, erythrocyte — recognising it makes several technical spellings predictable.
• Chrome/chromo- appears in chromosome (coloured body, so named because the structures took up dye), chromatography and monochrome.
• Cytochromes sit in the inner mitochondrial membrane and are central to oxidative phosphorylation, the process producing most of a cell's ATP.