Mitochondria and choloroplast are :
I. semi-autonomous organelles.
II. formed by division of pre-existing  organelles and they contain DNA but lack protein synthesizing machinery. 

• II is true but I is false

• I is true but II is false

• Both I and II are false

• Both I and II are false

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

• Chloroplasts

• Lysosomes

• Nuclei

• Nuclei

One of the major components of cell wall of most fungi is

• peptidoglycan

• cellulose

• hemicellulose

• hemicellulose

A complex of ribosomes attached to a single strand of RNA is known as 

• Polymer

• Polypeptide

• Okazaki's fragment

• Okazaki's fragment

Water-soluble pigments found in plant cell vacuoles are

• chlorophylls

• carotenoids

• anthocyanins

• anthocyanins

In a chloroplast the highest number of protons are found in

• lumen of thylakoids

• inter membrane space

• antennae complex

• antennae complex

A phosphoglyceride is always made up of

• only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached

• only an unsaturated fatty acid esterified to glycerol molecule to which a phosphate group is also attached

• a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached

• a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached

Pigment-containing memberanous extensions in cyanobacteria are

• heterocysts

• basal bodies

• pneumatophores

• pneumatophores

A major site for synthesis of lipids is 

• RER

• SER

• symplast

• symplast

The Golgi complex plays a major role

• in trapping the light and transforming it into chemical energy

• in digesting proteins and carbohydrates

• as energy transferring organelles

• as energy transferring organelles