Cells And Metabolism

• recognise problem Collection of info related to problem Making a hypothesis Testing the hypothesis- prediction Collection of data from experiment (new questions to be answered If hypothesis is supported: Make a conclusion (If not make another hypothesis)

Dependent- y axis measure Independent- x axis choose/change Controlled- what we keep the same

Is a prediction, direction of change size of change

What you want to know

Surrounds the cell and forms outer boundary- controls move of what’s going in and out

Usually a sphere- contains genetic material mostly DNA

Composed mainly of RNA Makes ribosomes

Thick fluid inside the cell and the suspended structure is contains

Structures suspended in the cytoplasm that carry out particular functions

Internal scaffolding of protein fibres with the cytoplasm( gives shape and assists cell movement)

Chemical substances occurring as granules or liquid droplets in the cytoplasm

small spherical organelles At the ribosomes amino acids join and form protein can be attached or free from one another

Membranes of ER provide surface for chemical reactions while channels are for storing or transferring molecules

Flattened membrane stacked Modify proteins and package them for creation from the cell Ribosomes->ER-> Golgi body

A membrane bound sac transfer into and out of cell

Sausage shape Cells “powerhouse” Double membrane (smooth and folded inner membrane) Release energy in form of respiration

Storage of food water and waste

Protective barrier like structure Regulating passage of material Made of phospholipid molecules (which are lipid molecules contain a phosphate group) LIPID BI-LAYER

Polar heads which are hydrophilic Water loving Molecules pass easily

Non polar tails which are hydrophobic Water fearing Molecules do not pass - bounce off

When molecules disperse form a high concentration area to a low concentration area Spreads out evenly throughout gas or liquid

Is the diffusion of water molecules from a higher to lower concentration of water molecules

Occurs when substances are transported though a protein along the concentration gradient - high to low -passive

Substances transmitted accross the membrane against the concentration gradient -low to high concentration. Active- energy (ATP) Cell can take in or pass out substances regardless of their concentration inside or out