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Cell: The Unit of Life · Question 55

NEET 2016 (Phase 2)MCQEasy📈 Topic in 50% papers+4−1
1

Select the wrong statement-

  1. Pili and fimbriae are mainly involved in motility of bacterial cells
  2. Mycoplasma is a wall-less microorganism
  3. Bacterial cell wall is made up of peptidoglycan
  4. Cyanobacteria lack flagellated cells.

Answer

(1) Pili and fimbriae are mainly involved in motility of bacterial cells

Solution

As per NCERT, besides the flagellum, pili and fimbriae are also surface structures of the bacteria but do not play a role in motility; pili are elongated tubular structures and fimbriae are small bristle-like fibres that help some bacteria attach to rocks in streams and to host tissues. ⇒ Statement (1) is wrong.

∵ Mycoplasma completely lacks a cell wall; the bacterial cell wall is made of peptidoglycan; cyanobacteria have no flagellated cells.

Answer: (1)

NEET 2016 (Phase 2)

Keep practising — Cell: The Unit of Life

2

A cell organelle containing hydrolytic enzymes is

  1. Ribosome
  2. Mesosome
  3. Lysosome
  4. Microsome
NEET 2016 (Phase 2)
3

The structures that help some bacteria to attach to rocks and/or host tissues are

  1. mesosomes
  2. holdfast
  3. rhizoids
  4. fimbriae.
AIPMT 2015
4

Chromatophores take part in

  1. movement
  2. respiration
  3. photosynthesis
  4. growth.
AIPMT 2015
5

Balbiani rings are sites of :

  1. Polysaccharide synthesis
  2. Lipid synthesis
  3. RNA and protein synthesis
  4. Nucleotide synthesis
AIPMT 2015
6

Match the columns and identify the correct option.

  1. (a) (iv), (b) (ii), (c) (i), (d) (iii)
  2. (a) (iv), (b) (iii), (c) (i), (d) (ii)
  3. (a) (iii), (b) (iv), (c) (i), (d) (ii)
  4. (a) (iii), (b) (i), (c) (iv), (d) (ii)
AIPMT 2015
7

Which of the following structures is not found in a prokaryotic cell?

  1. Mesosome
  2. Nuclear envelope
  3. Ribosome
  4. Plasma membrane
AIPMT 2015
8

Cellular organelles with membranes are -

  1. endoplasmic reticulum, ribosomes and nuclei
  2. lysosomes, Golgi apparatus and mitochondria
  3. nuclei, ribosomes and mitochondria
  4. chromosomes, ribosomes and endoplasmic reticulum
AIPMT 2015
9

Which of the following are not membrane-bound ?

  1. Ribosomes
  2. Mesosomes
  3. Lysosomes
  4. Vacuoles
AIPMT 2015
10

DNA is not present in :

  1. Nucleus
  2. Chloroplast
  3. Mitochondria
  4. Ribosomes
AIPMT 2015 (Cancelled)
11

Nuclear envelope is a derivative of :

  1. Membrane of Golgi complex
  2. Smooth endoplasmic reticulum
  3. Rough endoplasmic reticulum
  4. Microtubules
AIPMT 2015 (Cancelled)

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