QUIZ 1 MOLECULES OF LIFE

1. Which of the following properties of water are essential for the functions of blood plasma?

2. I - Universal solvent

3. II - High specific heat capacity

4. III - Highest density at 4 degree celcius

• I, II and III

• I and II

• II and III

• I and III

How many hydrogen bonds formed from a combination of 5 molecules of water?

• 5

• 4

• 6

• 3

Under scorching sun, the ocean is not as hot as the exposed surface of rocks on the beach. What is the reason for this statement?

• High specific heat capacity

• Universal solvent

• High latent heat of vapourization

• Cohesive and adhesive force of water

Why glucose can dissolve in water?

• it ionizes

• it is hydrophobic

• it is polysaccharide

• it has polar -OH that reacts with polar water molecules

Lactose, a sugar in milk. Is composed of one glucose molecules joined by a glycosidic bond to one galactose molecule. How is lactose classified?

• As a pentose

• As a monosaccharide

• As a dissacharide

• As a polysacchharide

Which of the following is a characteristic of saturated fats which distinguish them from unsaturated fats?

• they do not contain glycerol

• they contain only unbranched fatty acids

• they contain a high proportion of oxygen

• They do not have double bond between their C atoms.

The unique characteristics of each amino acid is determined by

• R group

• amino group

• type of peptide bond

• position of polypeptide chain

Adenine comprised of 36% of the nitrogenous bases in the DNA of bacterial cells. What was the % of Guanine in the DNA?

• 14%

• 18%

• 36%

• 64%

Identify the group of this amino acid

• polar

• non polar

• acidic

• basic

The storage polysaccharide found in human body is