Water (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
ShowHide
Practise the questions
12 questions from this quiz
What percentage of human body mass is made up of water?
What percentage of human body mass is made up of water?
Approximately 60%
What percentage of plant mass is composed of water?
What percentage of plant mass is composed of water?
80-90%
What percentage of human water exists outside cells?
What percentage of human water exists outside cells?
About 33%
Why is water's solvent property important for living organisms?
Why is water's solvent property important for living organisms?
Enables reactions & transport of molecules
What pH do living organisms maintain their water at?
What pH do living organisms maintain their water at?
Close to 7
Why is neutral pH important in living organisms?
Why is neutral pH important in living organisms?
Most enzymes function optimally at pH 7
What role does water play in photosynthesis?
What role does water play in photosynthesis?
Split to provide hydrogen ions & electrons
What is water's role in cellular respiration?
What is water's role in cellular respiration?
Produced as an end product
What happens when cells gain sufficient water?
What happens when cells gain sufficient water?
They become swollen & maintain shape
What visible effect occurs when plant cells lose water?
What visible effect occurs when plant cells lose water?
The plant wilts & loses strength
Why is water an excellent temperature regulator?
Why is water an excellent temperature regulator?
It heats slowly & cools gradually
What happens to red blood cells when they lose water?
What happens to red blood cells when they lose water?
Reduced oxygen-carrying capacity