2.1.2 a) Biological molecules - Water Flashcards
1
Q
What are the main roles of water ?
A
Solvent
Transport medium
Coolant
Habitat
2
Q
What type of bonds make up a water molecule ?
A
Covalent bonds
3
Q
What is a covalent bond ?
A
Sharing of electrons between atoms
4
Q
What does the term dipolar mean ?
A
There are different charges across the molecule
5
Q
Is water dipolar molecule and why ?
A
Water is a dipolar molecule as there is an uneven distribution of electrons.
6
Q
When water molecules interact with each other what is produced ?
A
Hydrogen bonds
7
Q
What is a hydrogen bond ?
A
The attraction between a hydrogen atom with a partial positive charge and another atom with a partial negative charge
8
Q
How is a hydrogen bond displayed in drawings ?
A
A dashed line
9
Q
Is water more or less dense as a solid ?
A
Less dense
