Biological Molecules

What kind of interaction helps to stabilize the secondary structure of proteins?

• Ionic bonding

• Hydrophobic interaction

• Hydrogen bonding

• Phosphodiester bond

The nucleic acid that consists of only one polynucleotide strands is called as ______________.

• DNA

• RNA

• Nucleotide

• Adenine

What is the chemical bond to link the different nucleotides together into polynucleotide strand?

• Hydrogen bond

• Ionic bond

• Phosphodiester bond

• Glycosidic bond

Which of the following is NOT the correct description for enzymes?

• globular protein

• used up at the end of the reaction

• denature by high temperature

• it has specific active site

Which of the following is NOT the structural component to make up nucleotide?

• Pentose sugar

• Phosphate group

• Nitrogenous base

• Glycerol

Which of the following nitrogenous bases you cannot find in RNA?

• Thymine (T)

• Adenine (A)

• Cytosine (C)

• Guanine (G)

The general mechanism is that an enzyme acts by:

• Reducing the activation energy

• Increasing activation energy

• Decreasing pH value

• Increasing the pH value

The coenzyme is:

• Often a metal

• always a protein

• often a vitamin

• always an inorganic compound

Enzymes are made Up of:

• Fats

• Proteins

• Vitamins

• Carbohydrates

In the human body, the optimum temperature for enzymatic activities is:

• 10 degree celcius

• 25 degree celcius

• 37 degree celcius

• 50 degree celcius