homework #2 Flashcards
(2 cards)
Starch, glycogen, and cellulose are three types of polysaccharides. Compare and contrast the three molecules based on structure, function, and class of organisms they are found in.
The structures of Starch is composed of amylose( which is unbranched) and amylopectin ( which is somewhat branched). The Function is primary energy storage in plants, also serves for a source of glucose. The class organisms is found in plants. The structures of Glycogen is composed of glucose and glycosidic bonds in the main chain and several others on where it branches. Function is for short term storage for energy in animals. Class of organisms is found in animals specifically in muscles and liver. The structures of Cellulose is composed of glucose, glycosidic bonds and unbranched chains. There is also hydrogen bonds in which form larger and rigid fibers. Function is the structural component of plant cell walls also providing the strength. You can also find cellulose in alternative sugar! Class of organisms is found in plants in the cell walls.
Describe three organelles/cell structures that are found in plant cells but not animal cells, including their function in plants.
The three organelles/cell structures that are found in plant cells but not in animal cells are central vacuole, chloroplasts and cell wall. (As seen on slide 5 plant vs animal cells). Their function in plants for central vacuole is the large storage organelles found in plant cells. They are membrane bound sacs that function in storage and transport. The vacuoles membrane does not fuse with the membranes of other cellular components. Its also to maintain pressure in supporting the plants structure. The chloroplasts function is to convert light and water into sugar which is also known as photosynthesis. It contains chlorophyll and the thylakoid membrane is where photosynthesis occurs. The cell wall is rigid covering that protects hte cell and gives support and shape to it. The cell wall is cellulose, a polysaccharide comprised of glucose units.
