Cell: The Unit of Life

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

Which of the following are not membrane-bound ?

1. Ribosomes
2. Mesosomes
3. Lysosomes
4. Vacuoles

DNA is not present in :

1. Nucleus
2. Chloroplast
3. Mitochondria
4. Ribosomes

Nuclear envelope is a derivative of :

1. Membrane of Golgi complex
2. Smooth endoplasmic reticulum
3. Rough endoplasmic reticulum
4. Microtubules

The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are

1. Stroma lamellae
2. Cristae
3. Stroma
4. Grana