Cell: The Unit of Life

Match the following and select the correct answer :

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

Pigment containing membranous extensions in some cyanobacteria are

1. pneumatophores
2. chromatophores
3. heterocysts
4. basal bodies.

The Golgi complex plays a major role :

1. as energy transferring organelles
2. in post translational modification of proteins and glycosidation of lipids
3. in trapping the light and transforming it into chemical energy
4. in digesting proteins and carbohydrates

Which one of the following organelle in the figure correctly matches with its function ? [Figure]

1. Golgi apparatus, formation of glycolipids
2. Rough endoplasmic reticulum, formation of glycoproteins
3. Rough endoplasmic reticulum, protein synthesis
4. Golgi apparatus, protein synthesis

A major site for synthesis of lipids is :

1. RER
2. Nucleoplasm
3. SER
4. Symplast

Why is a capsule advantageous to a bacterium?

1. It protects the bacterium from desiccation.
2. It provides means of locomotion
3. It allows bacterium to "hide" from host's immune system.
4. It allows the bacterium to attach to the surface.

The term 'glycocalyx' is used for :

1. bacterial cell glyco-engineered to possess N-glycosylated proteins
2. a layer present between cell wall and membrane of bacteria
3. a layer surrounding the cell wall of bacteria
4. cell wall of bacteria

Which of the following types of plastids does not contain stored food material ?

1. Elaioplasts
2. Chromoplasts
3. Amyloplasts
4. Aleuroplasts

Select the alternative giving correct identification and function of the organelle 'A' in the diagram [Figure]

1. Golgi body - provides packaging material
2. Mitochondria - produce cellular energy in the form of ATP
3. Endoplasmic reticulum - synthesis of lipids
4. Lysosomes - secrete hydrolytic enzymes

Which one of the following cellular parts is correctly described ?

1. Lysosomes - optimally active at a pH of about 8.5
2. Centrioles - sites for active RNA synthesis
3. Thylakoids - flattened membranous sacs forming the grana of chloroplasts
4. Ribosomes - those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S)