Water & its Functions (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
How many hydrogen atoms are bonded to each oxygen atom in a water molecule?
How many hydrogen atoms are bonded to each oxygen atom in a water molecule?
Two
Which part of the water molecule carries a slight negative charge?
Which part of the water molecule carries a slight negative charge?
Oxygen atom
Compared to a covalent bond, how strong is a hydrogen bond in water?
Compared to a covalent bond, how strong is a hydrogen bond in water?
One-tenth the strength
What property allows water to resist rapid temperature changes in organisms?
What property allows water to resist rapid temperature changes in organisms?
High specific heat capacity
Why is perspiration an effective cooling mechanism in mammals?
Why is perspiration an effective cooling mechanism in mammals?
Evaporation has high latent heat
Which property enables water to be drawn upward through xylem vessels in plants?
Which property enables water to be drawn upward through xylem vessels in plants?
Cohesion
Which property of water supports lightweight organisms like pond skaters?
Which property of water supports lightweight organisms like pond skaters?
Surface tension
What percentage of water typically makes up mammals?
What percentage of water typically makes up mammals?
65%
Which substances can water effectively dissolve?
Which substances can water effectively dissolve?
Gases, ions, & hydrophilic molecules
What role do phosphate ions play in organisms?
What role do phosphate ions play in organisms?
DNA structure & energy storage in ATP