Plant cell structure (2)

Beth Ritchie
Mind Map by , created over 5 years ago

Biology (Cells and Movement in and out of them) Mind Map on Plant cell structure (2), created by Beth Ritchie on 02/15/2014.

Beth Ritchie
Created by Beth Ritchie over 5 years ago
Cell Transport
Elena Cade
Cells And Cell Techniques - Flashcards (AQA AS-Level Biology)
Henry Kitchen
Luisa Mandacaru
C2: Material Choices Test
James McConnell
1PR101 1.test - 10. část
Nikola Truong
GCSE Biology B2 (OCR)
Usman Rauf
Biology Unit 2 - DNA, meiosis, mitosis, cell cycle
AQA Biology 8.1 structure of DNA
Charlotte Hewson
Function and Structure of DNA
Elena Cade
Biological Molecules Definitions
Plant cell structure (2)
1 Chloroplasts
1.1 Structure
1.1.1 Chloroplast envolope Double plasma membrane that surrounds the organelle Highly selective with what it allows to enter and leave the chloroplast
1.1.2 Grana Stacks of up to 100 disc-like structures called thylakoids Within the tylakoids is the photosynthetic pigment chlorophyll Some tylakoids have tubular etensions that join with thylakoids in adjacent grana Intergranal lamella Where the first stage of photosynthesis takes place
1.1.3 Stroma Fluid filled matrix where the second stage of photosynthesis takes place Contains a number of other structures such as starch grains
1.2 Relationship to function
1.2.1 Function is to harvest sunlight and carry out photosynthesis
1.2.2 Granal membranes provide a large surface area for the attachment of chlorophyll, electron carriers and enzymes which carry out the 1st stage of photosynthesis. These chemicals are attached to the membrane in a highly ordered fashion
1.2.3 Fluid of stroma possesses all the enzymes needed to carry out stage 2 of photosynthesis
1.2.4 Chloroplasts contain both DNA and ribosomes so they can quickly and easily manufacture proteins needed for photosynthesis
2 Cell wall
2.1 Structure
2.1.1 Consist of a number of polysaccharides, such as cellulose
2.1.2 Cell wall consists of microfibrils of the polysaccharide cellulose embedded in a matrix
2.1.3 Thin layer called the middle lamella, which marks the boundary between adjacent cell walls and cements adjacent cells together
2.1.4 3 layers - middle lamella, primary wall and secondary wall
2.1.5 Microfibrils are small fibres made of glycoproteins and cellulose
2.2 Functions
2.2.1 To provide mechanical stength in order to prevent cell birsting under turgor pressure
2.2.2 Mechanical strength for the plant as a whole
2.2.3 To allow water to pass along it and so to contribute to the movement of water through the plant
2.2.4 Cellulose microfibrils have considerable strength, allowing the cell wall to carry out its functions
3 Plasmodesmata
3.1 Function
3.1.1 Allows neighbouring cells to link together
3.2 Structure
3.2.1 Gaps in cell walls
3.2.2 3 main layers Cell membrane Cytoplasmic sleeve Fluid filled space through which things can be transported Desmotubule Channel of appressed ER between neighbouring cells
3.3 Relationship
3.3.1 The gap allows materials to be shared
4 Vacuole
4.1 Function
4.1.1 Creates turgor pressure for support
4.1.2 Storage
4.2 Structure
4.2.1 Fluid filled sac containing cell sap Water, amino acids, glucose, salts
4.2.2 Tonoplast membrane Separates vacuole contents from the rest of the cell Regulates movement in and out of the vacuole
4.3 Types
4.3.1 Food Stores and digests ingested food
4.3.2 Contractile Pumps out excess water to maintain homeostasis
4.4 Relationship
4.4.1 Partially permeable tonoplast membrane allows movement in and out and maintains pH and ionic concentration
4.4.2 Enzymes capable of digesting the cell held within, which can be used for programmed cell death (apoptosis)
5 Root hair cells
5.1 Absorb water through osmosis
5.2 Mineral absorbtion through active transport
5.3 Large surface area
5.4 Contains carrier proteins in cell membrane for active transport

Media attachments