BOTANY LAB: PLANT STRUCTURES Flashcards
DEVELOPERS OF CELL THEORY
- He stated all plants are composed of cells
MATTHIAS SCHLEIDEN
DEVELOPERS OF CELL THEORY
- He stated that all animals are also composed pf cells—thus claimed all living things are composed of cells
THEODOR SCHWANN
DEVELOPERS OF CELL THEORY
- He stated all cells came from pre-existing cells
RUDOLF VIRCHOW
All organisms are made up of cells
CELL THEORY
The basic unit of structure and function in all organisms
CELLS
All cells come from cells that already exist
CELL THEORY
- Have the same basic eukaryotic organization
- At maturity when they become specialized, it may differ greatly from one another in their structure and functions
PLANT CELL
- Contains many organelles with specific functions
- Enclosed by a membrane which defines their boundaries
- Has a Cell wall
PLANT CELL
PLANT CELL VS ANIMAL CELL
- Cell wall
PLANT CELL
PLANT CELL VS ANIMAL CELL
- Plastid
PLANT CELL
PLANT CELL VS ANIMAL CELL
- One large central vacuole, taking up 90% of the cell volume
PLANT CELL
PLANT CELL VS ANIMAL CELL
- One or more small vacuoles
ANIMAL CELL
PLANT CELL VS ANIMAL CELL
- Rectangular shape
PLANT CELL
PLANT CELL VS ANIMAL CELL
- Has a Round shape
ANIMAL CELL
PLANT CELL VS ANIMAL CELL
- Some has glyoxysomes
PLANT CELLS
PLANT CELL VS ANIMAL CELL
- Centrioles are only present in lower forms
PLANT CELL
PLANT CELL VS ANIMAL CELL
- Centrioles are always present
ANIMAL CELL
PLANT CELL VS ANIMAL CELL
- Lyoxysomes are usually not evident
PLANT CELL
PLANT CELL VS ANIMAL CELL
- Lyoxysomes occur in cytoplasm
ANIMAL CELL
PLANT CELL VS ANIMAL CELL
- Cell membrane + Cell wall
PLANT CELL
PLANT CELL VS ANIMAL CELL
- It only has Cell membrane
ANIMAL CELL
PLANT CELL VS ANIMAL CELL
- Has Chloroplasts
PLANT CELLS
PLANT CELL VS ANIMAL CELL
- Has no Chloroplast
ANIMAL CELL
CELL STRUCTURE AND FUNCTION
Function in plants:
- For protection
- For photosynthesis
- Defines cell shade
CELL WALL
CELL STRUCTURE AND FUNCTION
Composition:
- Cellulose
- Hemicellulose
- Held together by the Middle lamella
- Made of: Cellulose, Xyloglucan, Pectin, Proteins, Ca2+ ions, Lignin, Water, Other ions
CELL WALL
CELL STRUCTURE AND FUNCTION
- Main component of cell wall
CELLULOSE
CELL STRUCTURE AND FUNCTION
- A glue-like substance that holds cellulose fibrils together
HEMICELLULOSE
CELL STRUCTURE AND FUNCTION
- The cell walls are held together by
MIDDLE LAMELLA
CELL STRUCTURE AND FUNCTION
- The organic material that gives stiffness to fruit jellies
PECTIN
CELL STRUCTURE AND FUNCTION
- Proteins associated with sugar
GLYCOPROTEIN
CELL STRUCTURE AND FUNCTION
- Composed of cellulose microfibrils (embedded in lignin—a complex polymer)
SECONDARY CELL WALLS
CELL STRUCTURE AND FUNCTION
- Responsible for giving cell’s shape and where most chemical processes take place
CYTOPLASM
CELL STRUCTURE AND FUNCTION
- Clear in color and has a gel-like appearance
- It helps to move materials, such as hormones, around the cell and dissolves cellular waste
CYTOPLASM
CELL STRUCTURE AND FUNCTION
- Controls cell metabolism including signal pathways, intercellular receptor “Cell jello”
CYTOPLASM
CELL STRUCTURE AND FUNCTION
2 Primary parts:
- Central area of the cytoplasm that contains the organelles
ENDOPLASM
CELL STRUCTURE AND FUNCTION
2 Primary parts:
- More gel-like peripheral portion of the cytoplasm of a cells
ECTOPLASM
CELL STRUCTURE AND FUNCTION
- In cytoplasm, Bacteria and Archaeans, do not have a membrane-bound nucleus. In these cells, the cytoplasm consists of all the contents of the cell inside the plasma membrane
PROKARYOTIC CELLS
CELL STRUCTURE AND FUNCTION
- In cytoplasm, Plant and Animal cells, the Cytoplasm consist of three main components: Cytosol, Organelles, Cytoplasmic inclusions
EUKARYOTIC CELL
CELL STRUCTURE AND FUNCTION
- The semi-fluid component or liquid medium of a cell’s cytoplasm. It is located outside of the nucleus and within the cell membrane
CYTOSOL
CELL STRUCTURE AND FUNCTION
- Tiny cellular structures that perform specific functions within a cell. Examples of organelles include Mitochondria, Ribosomes, Nucleus, Lysosomes, Chloroplasts, Endoplasmic reticulum, and Golgi apparatus
ORGANELLES
CELL STRUCTURE AND FUNCTION
- Particles that are temporarily suspended in the cytoplasm. Inclusions consists of macromolecules and granules
CYTOPLASMIC INCLUSIONS
CELL STRUCTURE AND FUNCTION
- Tiny strands of cytoplasm that extends between cell openings
- Where transfer of Sugar, Ions, and other Substances occur
PLASMODESMATA (sing. Plasmodesma)
CELL STRUCTURE AND FUNCTION
- Permeable, it allows movement of water and dissolved substances in and out of the cell
CELL WALLS & MIDDLE LAMELLAE
CELL STRUCTURE AND FUNCTION
- The outer boundary if the cell
PLASMA MEMBRANE
CELL STRUCTURE AND FUNCTION
- A thin semi-permeable layer that regulates substances that goes in and out of the cell
PLASMA MEMBRANES
CELL STRUCTURE AND FUNCTION
- Involved in the production and assembly of cellulose for cell walls
PLASMA MEMBRANE
CELL STRUCTURE AND FUNCTION
- Composed of Phospholipids in 2 layers interspersed with protein
PLASMA MEMBRANE
CELL STRUCTURE AND FUNCTION
- Covalent bond links CHO to both lipids and proteins
PLASMA MEMBRANE
CELL STRUCTURE AND FUNCTION
- Creates pressure that pushes the plasma membrane into the cell wall
OSMOSIS
CELL STRUCTURE AND FUNCTION
Functions:
- Mediates the transport if substances into and out if the protoplasm
- It coordinates the synthesis and assembly of cellulose microfibrils
- Relays hormonal and environmental signals involved in the control of cell growth and differentiation
PLASMA MEMBRANE
CELL STRUCTURE AND FUNCTION
- Grayish, spherical to ellipsoidal lump
NUCLEUS
CELL STRUCTURE AND FUNCTION
- Control center of the cell for growth, differentiation, and storage of hereditary information (passed on from cell to cell)
NUCLEUS
CELL STRUCTURE AND FUNCTION
- DNA ‘blue prints’
- Green cells the nucleus are obscured by chloroplast
NUCLEUS
CELL STRUCTURE AND FUNCTION
- Membrane that envelops the nucleus
NUCLEAR ENVELOP
CELL STRUCTURE AND FUNCTION
- Granular fluid in the nucleus; suspends larger bodies
NUCLEOPLASM
CELL STRUCTURE AND FUNCTION
- Composed of RNA and proteins
NUCLEOLI (sing. Nucleolus)
CELL STRUCTURE AND FUNCTION
- Produces ribosomes
- Moves the ER and is critical in protein synthesis
NUCLEOLUS
CELL STRUCTURE AND FUNCTION
- Thin strands involved in the process of dividing
CHROMATIN
CELL STRUCTURE AND FUNCTION
- Not visible in light microscope unless stained
- Composed of protein and DNA
CHROMATIN
CELL STRUCTURE AND FUNCTION
- Condensed chromatin
- Thicker and shorter
CHROMOSOMES
CELL STRUCTURE AND FUNCTION
- An enclosed space with network of flattened sacs and tubes forming channels
ENDOPLASMIC RETICULUM (ER)
CELL STRUCTURE AND FUNCTION
- Connected with the outer membrane of the nucleus
ENDOPLASMIC RETICULUM (ER)
CELL STRUCTURE AND FUNCTION
- Facilitates cellular communications and channeling of materials
ENDOPLASMIC RETICULUM (ER)
CELL STRUCTURE AND FUNCTION
- Rough ellipsoidal in shape
- Composed of 2 subunits that are composed of RNA & proteins
RIBOSOMES
CELL STRUCTURE AND FUNCTION
- 55 kinds of protein are found in each ribosomes
of prokaryotic cell and slightly higher in eukaryotic
- Not membrane bound; NOT and organelle
RIBOSOMES
CELL STRUCTURE AND FUNCTION
- Stacks of flattened discs or vesicles scattered in the cytoplasm
- Bound by branching tubules from the ER
DICTYOSOMES/ GOLGI APPARATUS
CELL STRUCTURE AND FUNCTION
- Aggregates will constitute the Golgi apparatus (also found in protein secreting animal cells) names after CAMILO GOLGI (discoverer, 1898)
- Responsible for collecting, packaging, and delivery center or ‘’post office” of the cell
DICTYOSOMES/ GOLGI APPARATUS
CELL STRUCTURE AND FUNCTION
- They occur in a variety of shapes and sizes (with the chloroplasts)
PLASTIDS
CELL STRUCTURE AND FUNCTION
- Found within the chloroplast formed from membranes like a stack of coins
GRANA
CELL STRUCTURE AND FUNCTION
- Stacks of 2-100 found in each granum; it contains green chlorophyll pigments; where the first steps of photosynthesis happen
THYLAKOIDS
CELL STRUCTURE AND FUNCTION
- Membrane contains chlorophyll and its associated proteins
- Site of proteins
- Have inner and outer membranes
CHLOROPLAST
CELL STRUCTURE AND FUNCTION
- Surounded by stroma
- Works like mitochondria
- During photosynthesis, ATP from stroma provide the energy for the production if sugar molecules
CHLOROPLAST
CELL STRUCTURE AND FUNCTION
- Colorless liquid portion of chloroplast containing enzyme involved in photosynthesis
STROMA
CELL STRUCTURE AND FUNCTION
- Contains small circular DNA structure that encodes for production of proteins needed for photosynthesis and RNA and ribosomes facilitate protein synthesis
CHLOROPLAST
CELL STRUCTURE AND FUNCTION
- Lack of chlorophyll but synthesize and retain Carotenoid pigments which are responsible for the Yellow, Orange, or Red colors of may flowers, old leaves, some fruits and some roots
CHROMOPLAST
CELL STRUCTURE AND FUNCTION
- Non pigmented plastids some of which synthesize starch while others produce oils or proteins
LEUCOPLAST
CELL STRUCTURE AND FUNCTION
- Upon exposure to light they may develop into chloroplasts
LEUCOPLAST
CELL STRUCTURE AND FUNCTION
- Contains Amyloplasts and Elaioplasts
LEUCOPLAST
CELL STRUCTURE AND FUNCTION
- Synthesize starch
AMYLOPLAST
CELL STRUCTURE AND FUNCTION
- Synthesize oils
ELAIOPLASTS
CELL STRUCTURE AND FUNCTION
- Known as the “powerhouse” of the cell
MITOCHONDRIA
CELL STRUCTURE AND FUNCTION
- Releases energy from organic molecules by the process of cellular respiration
MITOCHONDRIA
CELL STRUCTURE AND FUNCTION
- Barely visible with light microscope
- In motion and accumulate in groups where energy is needed
MITOCHONDRIA
CELL STRUCTURE AND FUNCTION
- Cucumber/paddle/rods or balls shaped
- Its plates-like folds are called cristae
MITOCHONDRIA
CELL STRUCTURE AND FUNCTION
- Plate like folds
CRISTAE
CELL STRUCTURE AND FUNCTION
- Makes up 90% of the plant cell volume
- Bound by Vacuolar membranes (tonoplast) similar function with plasma membrane
VACUOLE
CELL STRUCTURE AND FUNCTION
Function:
- Maintains cell pressure and pH
- Storage of cell metabolites and waste products
VACUOLE
CELL STRUCTURE AND FUNCTION
- Fluid inside the vacuole (slightly acidic); contains Salt, Sugar, Organic acids, and Soluble protein and Soluble pigments
CELL SAP
CELL STRUCTURE AND FUNCTION
- Responsible for the Red, Blue, Purple color of flowers and reddish leaves
ANTHOCYANIN
CELL STRUCTURE AND FUNCTION
- Involved in the movement within the cell
- With 2 kinds of fibers (microtubules, microfilaments)
- Unbranched, thin, hollow, tube like structure composed of protein called Tubulin
CYTOSKELETON
CELL STRUCTURE AND FUNCTION
- Control the addition of cellulose to the cell wall; involved in cell division, movement of cytoplasmic organelles, movement of vesicles, movement of Cilia and Flagella
MICROTUBULES
CELL STRUCTURE AND FUNCTION
- Structure of DNA that carries genes and functions of the cell
CHROMOSOME