Match Column I with Column II.
Column I Column II
A Metachromatic granules i Help in attaching to substratum
B Pili ii Elongated tubular structures
C Fimbriae iii Seen in photosynthetic prokaryotes
D Gas vacuoles iv Polyphosphates
Choose the correct answer from the below given options.
A B C D
1 iv iii ii i
2 iv ii i iii
3 ii iv i iii
4 iv ii iii i

Moderate

Solution

Metachromatic granules are also known as polyphosphate granules or volutin granules.
Pili are elongated tubular structures made of special protein pilin and involved in conjugation to hold the F^- strain and to pass the DNA into the F^- cell.
Fimbriae are small bristle like structures commonly seen in Gram negative bacteria which help in attaching to the substratum and host cells.
Gas vacuoles are impermeable protein membrane bound structures of photosynthetic prokaryotes which help in buoyancy.

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	Column I		Column II
A	Metachromatic granules	i	Help in attaching to substratum
B	Pili	ii	Elongated tubular structures
C	Fimbriae	iii	Seen in photosynthetic prokaryotes
D	Gas vacuoles	iv	Polyphosphates