Biological Science Assignment Sample

Running head: BIOLOGICAL SCIENCES 1
Biological sciences
Name
Date of Submission

BIOLOGICAL SCIENCES 2
Topic two
1.
Nucleus- storage of the hereditary material (DNA) and controls various cell functions.
Golgi body- sorts and transports proteins, and the synthesis of lipids.
Vesicles- transportation of materials from one organelle to another.
Mitochondria- synthesis of energy (Picard et al., 2016).
Ribosomes- protein synthesis
Nucleolus-synthesis of ribosomal subunits from the proteins and rRNA for the assembly
of complete ribosomes.
Nuclear membrane- lipid bilayers containing pores that protects the DNA molecules.
Nucleolus-found in the nucleus and are involved in the fabrication of ribosomes.

BIOLOGICAL SCIENCES 3
Rough ER-contains many ribosomes for protein synthesis
Smooth ER- contains vesicles for carrying lipids and proteins.
Vacuoles- storage of water and holding of waste materials
Cytoplasm- maintenance of the cell shape, transport of materials
Centrosome-microtubule organizing centers
Lysosome- contains degradative enzymes.
2. eukaryotic cell membranes have lipids (40%), proteins (50%) and carbohydrates in
form of glycolipids and glycoproteins (10%).
Non-polar- lipid bilayer containing a hydrocarbon oriented inwards to form a
hydrophobic portion.
Polar ends- made u of hydrophilic portions oriented outwards in the hydrophobic phase
(Ray et al., 2016).
Peripheral proteins-these collects the water soluble materials of proteins during protein
purification
Integral proteins- offer structural roles, transport of materials and binding to receptors

BIOLOGICAL SCIENCES 4
3. Eukaryotic protein synthesis