Bio 2120 - Study guides, Class notes & Summaries

BIO 2120 Exam 1 - Questions and Answers What is the most abundant molecule in cells? Water Atoms can rotate around ___ bonds but not around ___ bonds single, double The inorganic ions Na+ K+ Mg2+ Ca2+ HPO42- Cl- HCO3- Organic molecule classes 1. Carbohydrates 2. Lipids 3. Proteins 4. Nucleic acids Carbohydrates Simple sugars and polysaccharides, oligosaccharides (polymers of a few sugars) What is the main structural component of a plant cell wall? Of an animal cell wall? Cellulose for plants Ch...

BIO 2120 Exam 4 - Questions and Answers What proteins are found in the extracellular matrix that are recognized by cell surface proteins? Collagens Proteoglycans Fibronectin Laminin Cellular adhesion complexes that interact with ECM proteins Transmembrane integrins of focal adhesions and hemidesmosomes How do cells interact with each other? Cells interact with each other through cell adhesion complexes including adherens junctions, desmosomes and tight junctions Basal lamina Specialized meshwor...

BIO 2120 Exam 3 - Questions and Answers What is the key to maintaining the functional organization of a cell? The selectivity of vesicular transport- vesicles must recognize and fuse only with the appropriate target membrane Transport vesicles from the ER are coated with ___. Cytosolic coat proteins- coats assemble as the vesicle buds off and are removed in the cytosol before it reaches its target. The vesicles fuse with the target membrane, empty their cargo, and their membrane proteins diffus...

BIO 2120 Exam 2 - Questions and Answers RNA secondary and tertiary structure Defined by base pairing that forms stem-loops, critical for fitting onto the ribosome Genetic code collection of codons of mRNA, each of which directs the incorporation of a particular amino acid into a protein during protein synthesis In vitro translation Protein synthesis in a cell-free extract. How many possible codons are there? 64 61 specify an amino acid 3 are stop codons that signal the termination of protein sy...