Biochem Exam 1

Eukaryote

animal cell

Prokaryote

bacterial cell

What structures do eukaryotes and prokaryotes have in common?

- Cytoplasm
- Plasma membrane
- Ribosomes

Plasma membrane

- composed of lipid and protein molecules that form a thin, hydrophobic layer
- Free passage of inorganic ions and most charged or polar compounds

What do eukaryote cells have that prokaryotes do not?

Nucleus containing DNA & membrane bound organelles

What does a prokaryote cell have that a eukaryote cell does not have?

Nucleoid

Which three large groups do organisms fall into?

Bacteria, archaea, or eukaryote

Two broad categories based on energy source

Phototrophs or chemotrophs

Phototrophs

Trap and use sunlight

Chemotrophs

Derive their energy from the oxidation of a chemical fuel

Ribosomes

- place where protein synthesis occurs
- attached to the rough ER

Peroxisomes

Hang out in the cytoplasm oxidizing fatty acids and acting as a detoxifier

Cytoskeleton

Supports the cell and aids in movement of organelles

Lysosome

Filled with digestive enzymes to degrade unneeded cellular debris

Golgi

Processes, packages, and targets proteins to other organelles or for export

Smooth ER

Site of lipid synthesis and drug metabolism, detoxification, and storage of calcium in muscle cell

Nucleus

Contains the genes (chromatin)

Rough ER

Site of protein synthesis

Mitochondria

- Oxidizes fuels to produce ATP
- Site of the most of the energy extracting reactions of the cell

What happens once a protein leaves the golgi?

- Protein will become integral protein of plasma membrane
- Formation lysosomes, filled with hydrolytic proteins
- Exocytosed out of the cell

Cytoskeleton

- Contains protein filaments that interlock, forming three-dimensional meshwork inside cytoplasm
- Contains microtubules, actin filaments, and intermediate filaments
- Aids in cell shape, intracellular organization, intracellular transport paths, and cell

Is carbon flexible?

Yes, it can make many bonds. Single, double, and triple

Which carbon bonds can freely rotate?

Carbon single bonds. Double bonds cannot rotate because they are shorter in length

Is a triple bond weaker or stronger than a double bond?

Stronger

What is the HONC rule?

- Hydrogen, oxygen, nitrogen, and oxygen
- makes up 96% of the body

Stereoisomers

Same chemical formula but different physical properties