biological molecules

Question 1

what is a water molecule made from?

Answer 1

water is a biological molecule that consists of hydrogen and oxygen atoms covalently bonded together

Question 2

charge of water?

Answer 2

oxygen is negatively charged and hydrogen is positively charged making water a polar molecule

Question 3

how is a hydrogen bond formed in a water molecule

Answer 3

As both oxygen and hydrogen have opposite charges they are attracted to each other. A hydrogen bond is formed between an oxygen molecule and hydrogen molecule of another water molecule due to the attraction of the charges.

Question 4

properties of water (LCash)

Answer 4

• Latent heat of vapourisation coolant due to large number of hydrogen bonds in water.
• Cohesion molecules stick together allowing water to move up xylem in plants and blood vessels in animals.
• Adhesion water can also create hydrogen bonds to other molecules e.g (cellulose).
• Solvent water can dissolve many ionic and polar substances
• High Specific Heat Capacity
  helps maintain a constant body temperature.

Question 5

what are monomers?

Answer 5

monomers are the smaller units from which larger molecules are made from.

Question 6

polymers

Answer 6

molecules made from a large number of monomers joined together

Question 7

what is covalent bonding ?

Answer 7

sharing of 2 or more electrons between 2 atoms. very stable and high energies are required to break the bond.