chapter 1 biology matriculation

Why water is known as a universal solvent?

• Polar molecules

• Low viscosity

• High specific heat

• Low boiling point

What determines the cohesiveness of water molecules?

• Ionic bonds

• Nonpolar covalent bond

• Hydrophobic interactions

• Hydrogen bonds

Which statement is NOT the property of water?

• Water has high surface tension

• Water has high specific heat capacity

• Water is non-polar molecules

• Water is a solvent for ions and polar molecules

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

• 2

• 3

• 4

• 5

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

• Galactose

• Maltose

• Ribose

• Fructose

Why does glucose dissolve in water?

• It is hydrophobic

• It is a polysaccaride

• It is very reactive primary structure

• It has polar hydroxyl groups that interact with polar water molecules

Which of the following is NOT a difference between DNA and RNA?

• DNA has thymine whereas RNA has uracil

• DNA has deoxyribose sugar, whereas RNA has ribose sugar

• DNA is a polymer, whereas RNA is monomer

• DNA has two polynucleotide strands, whereas RNA usually has one polynucleotide

Which structure protein is formed when numerous amino acids joined together forming linear sequence?

• Primary

• Secondary

• Tertiary

• Quarternary

Why do protein have buffering effects in cells?

• They are non-polar

• They are amphoteric

• They form colloidal solutions

• They are major component of cell surface membranes

What is the backbone of a nucleic acid molecule?

• Purines

• Pyramidines

• Nitrogenous bases

• Alternating sugar and phosphate groups