Where are photosynthetic pigments present in chloroplast?

Inner mitochondrial membrane has a number of in foldings called ......... .

Which one are the protein factories of the cells?

Where do contractile vacuoles occur?

Differentiate between the following

(i) Endocytosis and exocytosis

(ii) Cis and trans faces of Golgi apparatus

(iii) Chromosome and chromatid

(iv) Write function of nucleolus