• 072920 77839
  • info@smartachievers.in
Menu
Back
  • JEE ADVANCE
  • JEE MAIN
  • NEET
  • BITSAT
  • CBSE BOARD
  • UP BOARD
  • CUET
JEE ADVANCE
  • CLASS XI - XII
  • CRASH COURSE
CRASH COURSE
JEE MAIN
  • CLASS XI - XII
  • CRASH COURSE
CRASH COURSE
NEET
  • CLASS XI - XII
  • CRASH COURSE
BITSAT
  • CLASS XI - XII
CBSE BOARD
  • CLASS IX
  • CLASS X
  • CLASS XI
  • CLASS XII
  • CLASS VI
  • CLASS VII
  • CLASS VIII
UP BOARD
  • CLASS IX
  • CLASS X
  • CLASS XI
  • CLASS XII
CUET
  • CRASH COURSE
Courses


Solution


Q.

The structures that help some bacteria to attach to rocks and/or host tissues are                   [2015]
1 mesosomes  
2 holdfast  
3 rhizoids  
4 fimbriae  

Ans.

(4)

Pili and fimbriae are bacterial appendages which are not involved in locomotion. Actually, pili are long, fewer and thick tubular outgrowths which develop in response to F+ or fertility factor in Gram-negative bacteria. Being long, they are helpful in attaching to the recipient cell and forming a conjugation tube. Fimbriae are small bristle-like fibers sprouting from the cell surface in large numbers. There are 300–400 of them per cell. They are involved in attaching bacteria to solid surfaces.