MOLECULES OF LIFE

Which statement is NOT the property of water?

• It is a non-polar molecule

• Water is a versatile solvent

• Water has high specific heat capacity

• Water has high latent heat of vaporization

Which of the following is NOT TRUE about hydrogen bonding?

• Bond between the water molecules

• Enables ice to float on water

• Involved in the cohesion of water

• Causes water to have low heat of vaporization.

How many water molecules can form hydrogen bonds with one water molecule?

• 4

• 3

• 2

• 5

Which type of bond is responsible for holding together two molecules of glucose?

• Ionic bond

• Hydrogen bond

• peptide bond

• glycosidic bond

Which of the following carbohydrates will yield two molecules of glucose upon hydrolysis?

• Fructose

• Maltose

• Galactose

• Ribose

When β-glucose is condensed to form polymer, which of the following molecule is produced?

• Starch

• Glycogen

• Insulin

• Cellulose

A peptide bond formation between two amino acids is accompanied by

• Loss of water

• Addition of water

• Decarboxylation

• Loss of nitrogen atom

Which statements about the carbohydrate shown above are TRUE?

I       Polymer made up of α-glucose.

II      Polymer made up of β-glucose.

III     Structural component of plant cell wall.

• I and II only

• I and III only

• II and III only

• I, II and III

Which statement about the deoxyribonucleic acid molecule is NOT true?

• It contains genetic information in its nucleotide

• It consists of two strands which are parallel to one another

• It contains the bases adenine, guanine, thymine and cytosine

• Its sugar unit is deoxyribose which has a hydrogen atom attached to the second carbon

A nucleotidA nucleotide of DNA  contains

• ribose, uracil and a phosphate group.

• deoxyribose, thymine and a phosphate group. 

•    ribose, thymine and a phosphate group.

•   deoxyribose, uracil and a phosphate group.