NATS 1610 Lecture Notes - Lecture 6: Cellular Respiration, Hemicellulose, Plant Cell

• School: York University
• Department: Natural Science
• Course: NATS 1610
• Professor: Barbara Czaban

Document Summary

The cytoplasm is the portion of the cell interior that is not occupied by the nucleus. Distinct, highly organized, membrane-enclosed structures: organelles - little organs , endoplasmic reticulum, golgi complex, lysosome, peroxisome, mitochondrion, chloroplasts, vesicles, cytosol. Complex, gel-like mass in which the cytoskeleton is found. The cytoplasm is about 70% to 90% water, and usually transparent. Most cellular activities occur in the cytoplasm: including many metabolic pathways (i. e. , glycolysis) and various processes (i. e. , cell division) The nucleus protects dna and keeps it from becoming tangles within the cytoplasm. Nuclear membrane (envelope) controls what goes in and out of the nucleus. Outer portion of nuclear envelope merges with the endoplasmic reticulum membrane (arrow) The inner portion of the nuclear envelope anchors dna molecules (chromatin) The thin fibrous dna coils into a thick complex. Cross both nuclear membranes providing channels for free movement of small molecules and ions. The proteins that make up the nuclear pore complex.