Cell: The Unit of Life · Question 91

Which one of the following organisms is not a eukaryote?

1. Paramecium caudatum
2. Escherichia coli
3. Euglena viridis
4. Amoeba proteus

Peptide synthesis inside a cell takes place in :

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

Important site for formation of glycoproteins and glycolipids is :

1. Plastid
2. Lysosome
3. Golgi apparatus
4. Vacuole

An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called -

1. Cytoskeleton
2. Endoplasmic Reticulum
3. Thylakoid
4. Plasmalemma

Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with – [Figure] Components : (i) Cristae of mitochondria (ii) Inner membrane of mitochondria (iii) Cytoplasm (iv) Smooth endoplasmic reticulum (v) Rough endoplasmic reticulum (vi) Mitochondrial matrix (vii) Cell vacuole (viii) Nucleus The correct components are :

1. (A) (v), (B) (iv), (C) (viii), (D) (iii)
2. (A) (i), (B) (iv), (C) (viii), (D) (vi)
3. (A) (v), (B) (i), (C) (iii), (D) (ii)
4. (A) (vi), (B) (v), (C) (iv), (D) (vii)

Membrane-bound organelles are absent in

1. Saccharomyces
2. Streptococcus
3. Chlamydomonas
4. Plasmodium

Algae have cell wall made up of:

1. cellulose, galactans and mannans
2. hemicellulose, pectins and proteins
3. pectins, cellulose and proteins
4. cellulose, hemicellulose and pectins

The plasma membrane consists mainly of –

1. proteins embedded in a carbohydrate bilayer
2. phospholipids embedded in a protein bilayer
3. proteins embedded in a phospholipid bilayer
4. proteins embedded in a polymer of glucose molecules

The main area of various types of activities of a cell is –

1. Cytoplasm
2. Plasma membrane
3. Nucleus
4. Mitochondrion

Which one of the following has its own DNA?

1. Dictyosome
2. Mitochondria
3. Peroxisome
4. Lysosome