Water (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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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?
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?
33%
Why is water described as an excellent solvent in living organisms?
Why is water described as an excellent solvent in living organisms?
It dissolves many molecules effectively
What pH is water maintained at in living organisms?
What pH is water maintained at in living organisms?
Close to 7
What happens to enzyme activity when pH deviates significantly from neutral?
What happens to enzyme activity when pH deviates significantly from neutral?
It decreases dramatically
What role does water play in photosynthesis?
What role does water play in photosynthesis?
Split to provide ions and electrons
What is water's role in cellular respiration?
What is water's role in cellular respiration?
It is produced as an end product
How does water move through cell membranes?
How does water move through cell membranes?
Freely through membranes
What happens to plant cells when they lose water?
What happens to plant cells when they lose water?
They wilt & lose strength
What effect does water loss have on red blood cells?
What effect does water loss have on red blood cells?
Reduced oxygen-carrying capacity
Why is water an excellent temperature regulator?
Why is water an excellent temperature regulator?
It absorbs heat energy effectively