Cell: The Unit of Life

Which one of the following cell organelles is enclosed by a single membrane?

1. Mitochondria
2. Chloroplasts
3. Lysosomes
4. Nuclei

Select the mismatch.

1. Large central vacuoles – Animal cells
2. Methanogens – Prokaryotes
3. Gas vacuoles – Green bacteria
4. Protists – Eukaryotes

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.

A cell organelle containing hydrolytic enzymes is

1. Ribosome
2. Mesosome
3. Lysosome
4. Microsome

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

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

Chromatophores take part in

1. movement
2. respiration
3. photosynthesis
4. growth.

Balbiani rings are sites of :

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

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)

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

1. Mesosome
2. Nuclear envelope
3. Ribosome
4. Plasma membrane

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