A. Nucleus envelope.
Used in regulation of macromolecules like proteins and mRNA but permits water, ions and ATP into the nucleus.
B. Cytoplasm
This is an environment for other organelles and is location for many metabolic processes.
C. Endoplasmic reticulum
Used for transport of materials , proteins and lipid synthesis.
D. Nucleus
Acts as repository for genetic information, control center of the cell.
E. Nucleoplasm
provides environment for nucleotides, enzymes and chromosomes.
F. Mitochondrion
For energy production through use of tricarboxylic acid cycle and electron transport chain among others.
G. Golgi apparatus
Packaging and secretion of materials for various purposes.
H. Secretory vesicles
Transport of materials, enzyme storage and also involved in metabolism.