Plant cells only Flashcards
Structures of only plant cells
Chloroplast, central vacuole, and cell walls
Chloroplast
Sit of photosynthesis
Plastids
A family of organelles including the chloroplast, amyloplast, and chromoplast. They include DNA genomes, can express their genes and make proteins
Amyloplast
colorless and stores starch. Occurs in great numbers in roots and tubers of some plants
Proteins are both…
Made by plastid genomes and made by the nuclear genes and transported
Chloroplast apperance
Lens shaped, and has smooth inner and outer boundary membranes that enclose the stroma
Stroma
The inner compartment of the chloroplast. Includes a third membrane called the thylakoid
Thylakoid
Flattened closed disks
Grana
Structures make from stacked thylakoids in tall plants
Thylakoid membrane
Contains molecules that absorb light and convert it to chemical energy
Chlorophyll job
It is the primary molecule in light absorption. Is green
Energy to food progression
Enzymes in the stroma use the energy to make carbs and organic molecules from CO2 and H2O
Chloroplast stroma
Contains DNA and ribosomes similar to photosynthetic bacteria (in their mitochondria)
Central vacuole
Takes up to 90% of the cells space, and provides structure to the cell
Tonoplast
Membrane around the central vacuole. Includes transport proteins and grows to increase the pressure of the central vacuole
Jobs of the central vacuole
Store salts, organic acids, sugar, protein pigments, and waste
Has enzymes that function like lysosomes
Chemical defenses against pathogens
Pigments
Produce colour in flowers
Cell wall
Extracellular, provides structure for a cell by keeping the central vacuoles pressure, protects against bacteria and fungi
Extracellular
Occurs on the outside of the cell
Cell wall is made of…
Cellulose fibers and is imbedded in a network of carbohydrates
Cell walls texture
Perforated by minute channels
Plasmodesmata
Each cell has 1000 to 100 000, they are cytosol filled channels lined with plasma membranes that connect cells together. They go off of the smooth ER
Plasmodesmata particles flowing
Small molecules flow freely, proteins and nucleic acid need energy to get through
Cell walls in fungi and algal protists
Mostly made from carbohydrates. Some chitin instead of cellulose