About PhD In Psychology o Certain cells need to be able to contact other nearby cells. Cell junctions adhere membranes of adjacent cells. Types of Cell Junctions There are three…
Cytoskeleton o The cytoskeleton is a cellular "scaffolding" or "skeleton" contained within the cytoplasm. o The cytoskeleton is present in all cells; it was once thought this structure was unique…
Endoplasmic Reticulum o The endoplasmic reticulum (ER) by the nucleus has many ribosomes attached to it on the cytosolic side, giving its granular appearance, hence the name granular or rough…
Cell Membrane and Endocytosis o Besides transport across the membrane, cells can acquire substances from the extracellular environment through endocytosis. o Endocytosis/exocytosis requires ATP hydrolysis. o Prokaryotes’s membranes cant before…
Cell Nucleus o The major feature distinguishing eukaryotic cells from prokaryotic cells is the nucleus of the eukaryote. o The aqueous ‘soup’ inside the nucleus is called the nucleoplasm. o…
What are Fungi? o Fungi represent a distinct kingdom of organisms with tremendous diversity and are eukaryotes but have characteristics of both prokaryotes and eukaryotes (such as a cell wall).…
What is Endospore Formation? o An endospore is a dormant, tough, and non-reproductive structure produced by Gram-positive bacteria which forms when a bacterium produces a thick internal wall that encloses…
Bacterial Growth Curve Bacterial growth in batch culture can be modeled with four different phases: lag phase, exponential or log phase, stationary phase, and death phase. Bacterial Growth Curve I.…
Bacterial Reproduction: Bacterial Conjugation o Bacteria (prokaryotes) CAN’T undergo meiosis or mitosis, don’t have centrioles, and they can ONLY undergo Asexual Reproduction. o The type of cell division they are…
Bacterial Cell Wall o The bacterial plasma membrane and everything inside of it is called the protoplast. o A protoplast isn’t a complete bacterium. o Protoplast: Plant, bacterial or fungal…