BTEC Applied Science Biology Samenvattingen, Aantekeningen en Examens

Describe the function of the nucleolus Produces ribosomes and RNA Describe the function of the cell wall Provides rigidity and protection to the cell Describe the function of the chloroplasts Site of photosynthesis as they contain chlorophyll Describe the function of the plasmodesmata A channel through the cell wall the allows transport of materials from one cell to another Describe the function of the amyoplasts Stores starch and converts starch back into glucose when the plant need...

plasma membrane a microscopic membrane of lipids and proteins (Phospholipid bilayer) that forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and that regulates the passage of molecules in and out of the cytoplasm. Golgi apparatus A system of membranes that modifies and packages proteins for export by the cell Vesicle Small membrane-bound sac that functions in moving products into, out of, and within a cell. Ribosomes site of protein synthesis - 70s in prokary...

What is the name of the process by which cells become specialized for a particular function from stem cells differentiation Explain what tissues are a collection of specialised cells Explain what an organ is a collection of tissues performing specific physiological functions what is the difference between to ribosomes in a prokaryote and a eukaryotic cell prokaryotes - 70s ribosome eukaryote - 80s ribosome Describe the function of the nucleolus Produces ribosomes and RNA Describe...

What does multicellular mean?Many organisms are multi-cellular, meaning that they are made from billions of cells. Why is it important that cells within these organisms become specialised?It is important that cells within these organisms become specialised for different roles with particular functions. How are multi-cellular organisms organized?1-Specialised cells 2-Tissues 3-Organs 4- Organ systems 5- Organism Where are palisade mesophyll cells found? And what is the shape of the...

What are proteins? Big molecules that do lots of important jobs in our bodies What do proteins do? They catalyse reactions (enzymes) They help bind cells into tissues They can be antibodies which protect us from pathogens They transport materials What are proteins made up of? Proteins are made up of amino acids How do amino acids join together? OH and H react then H2O is kicked out as water molecule. Then a branch forms between the 2 amino acids. Called a condensation reaction ...

what do sensory neurones do carry nervous impulses from receptors into the central nervous system (CNS) what do motor neurones do carry impulses from the CNS to the effector organs What do relay neurones do? relay neurones are intermediate neurones they recieve impulses from a sensory neurone and relay them to motor neurones what are dendrites carries nervous impulses towards a cell body what is an axon carry nervous impulses away from the cell body what is the cell body where ...