Self Study Flashcards
What is an ion
Atom with electric charge
What is a cation
Ion with a positive charge
What is an inorganic ion?
Charged molecule that doesn’t contain carbon
Which ion is found in phospholipids?
Phosphate ion
Why are the phosphate heads arranged in the position it is?
It is an inorganic ion. The phosphate hwads are polar meant they are attracted to water as they are hydrophilic. Therefore they are positioned towards water, towards cell cytoplasm
What is polar or non polar?
Polar
How are H20 atoms bonded?
Weak hydrogen bonds
4 functions of water
- a solvent
- involved in metabolic reactions
- support
- involved in temperature regulation
Why are + and - ions surrounded by water molecules?
Due to the attraction of charge between the ion and water molecules
What is a solvent?
A liquid in which substances can dissolve
Where does photosynthesis take place in the plant cells?
In chloroplasts
Word equation for photo synthesis ?
Carbon dioxide + water —-> oxygen + glucose
What would happen if water wasn’t available to plants?
No photosynthesis would occur so no glucose would be produced for respiration and so the plant couldn’t grow or survive
Why can animals float on water?
Up thrust force is greater than down ward
Explain turgor pressure in plants
As the vacuole fills with water, it becomes larger and pushes against the cell wall. This creates turgor pressure and keeps the cell firm and rigid