Function of cell (bbm)
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Transcript of Function of cell (bbm)
Have you noticed how workers at a construction site lay bricks to build the walls of a house ?
Just as the walls of a house are made of bricks, livings organisms are made of basic units called cells.
They form the building blocks of all living organism.
• Generally cell can be divided to two types, plant cell and animal cell.
• Both animal and plants cells consist of cytoplasm,nucleus and surrounded by a thin layer of plasma membrane.
WHAT IS ORGANELLE?
The cytoplasm contains structures called organelles.
Organelles perform specific functions which enables the cell to function as a unit of life.
Besides the nucleus, other examples of organelles include mitochondria, chloroplast, vacuoles, ribosomes, lysosomes and the Golgi apparatus.
Refers to all the membranes found inside the cell
• the membrane at the surface which encloses the content of a cell is called plasma membrane.
• made of proteins and phospholipids
• separates the content of a cell from the outer environment.
• semi-permeable and regulates the movement of substances into and out of the cytoplasm.
• Rigid outer layer that surrounds the plasma membrane of plant cells
• composed of cellulose,a a tough and fibrous carbohydrate
• permeable to all fluids
• gives shape to a plant cell
• provides mechanical support
• protection from rupturing
• region between the nucleus and the plasma membrane.
• jelly-like matrix in which organelles are suspended.
• acts a a medium for biochemical reactionsin the cell.
• provides substances obtained from the external environment to the organelles.
• large,dense and spherical organelle enclosed by nuclear membrane
• contain nucleolus, chromatin @ chromosome and nucleoplasm
• choromosomes carry genetic information
• controls all the activities which take place in the cell
• fluid-filled sac surrounded by tonoplast
• contain cell sap
• plant cell contain more vacuole compared with animal cell
• helps to regulate water balance
• acts as a storage place in a cell
• support herbaceous plant
• compact spherical organelles found attached to the surface of the rough endoplasmic reticulum or suspended freely in the cytoplasm
• contains two subunits,comprises a type of ribonucleic acid (RNA) and protein
• synthesis protein
• physically continuos with the nuclear membrane
• two types: rough ER and smooth ER
• RER: transport protiens made by ribosome
• SER: the site of important metabolic reactions,including synthesis of lipids
golgi apparatus
• functions as a processing, packaging and transporting centre of carbohydrates, proteins, phospholipids and glycoproteins
lysosomes
• membrane-bound sacs that contain hydrolytic enzymes• eliminate worn out mitochondria and others damaged organelles• digest bacteria by breaking down the bacteria cell wall
• typically lens-shaped
• contain green pigment chlorophyll
• chlorophyll traps sunlight and convert light energy to chemical energy during photosynthesis
QUESTION 1
livings organisms are made of basic units known as ?
• A – vacuole
• B – nucleus
• C – cell
• D - muscle
QUESTION 3
Which of the following is true about the cell
• A – cell wall
• B – cell membrane
• C – cytoplasma
• D - vacoule
gives shape to a plant cellprovides mechanical supportprotection from rupturing
QUESTION 5
Which of the following is the function of chloroplast
A - gives shape to a plant cell
• B - contain green pigment chlorophyll
• C - store energy in the form of ATP
• D - provides mechanical support