The cell Flashcards
What are the different shapes that bacteria can take and examples of each?
Spherical Cells- e.g. Streptococcus Rod-shaped cells- e.g. Escherichia coli and Salmonella Spiral Cells- e.g. Treponema pallidum
What is the basic structure of a bacteria?
Cell wall Plasma membrane DNA(plasmid) Flagellum Ribosomes inside cytosol
What are the differences between eukaryotic and prokaryotic cells?
How can you easily tell throught an elctrn micropscope wether the cell is eukarotic, rathe than prokaryotic?
It will have a distinct nucleus and plasma membrane.
Structure of a cell
What is the function of cytosol?
Metabolic pathways; protein synthesis
What is the function of nucleus?
What is the function of Rough Endoplasmic Reticulum?
Endoplasmic reticulum associated with ribosomes.
Synthesis of proteins for distribution to organelles, the plasma membrane and secretion
What is th function of Nucleolus?
What is th function of Smooth endoplasmic Reticulum ?
Endoplasmic reticulum not associated with ribosomes
Involved in lipid synthesis
What is the function of Golgi Apparatus?
Modification, sorting and packaging of proteins and lipids for either secretion or delivery to another organelle.
What is the function of Lysosomes?
What is the function of Endosomes?
Sorting of endocytosed material.
What is the function of Peroxisomes?
Oxidation of toxic molecules.
What is the functin of Mitochondria?
Production of ATP via oxidative phosphorylation.
What does the fluid mosaic model consist of?
What is the structure of the nucleus?
The nucleus is surrounded by a double membrane called the nuclear envelope. Inside the chromatin appears speckled. The heterochromatin appears dark – it is more condensed and is gene-poor and is found round the periphery of the nucleus. The nucleolus is where ribosomes are assembled. The ribosomal genes are clustered on multiple chromosomes but are clustered in one location within the cell.
