SL Week 8 Quiz on Molecules to metabolism (2.1)

Which of the following reactions occurs when a dipeptide is formed from amino acids?

• Hydrolysis

• Oxidation

• Condensation

• Denaturation

Which of the following statements is true about covalent bonds

• It is characteristic of all organic molecules.

• It only happens with carbon atoms.

• It is formed by the sharing of equal numbers of electrons by two atoms.

• It is formed by the exchange of equal numbers of electrons by two atoms.

Which of the following is an organic compound found in both plant and animal cells?

• Pyruvate

• Carbon dioxide

• Water

• Cellulose

Which molecule is shown?

• Glucose

• Galactose

• Ribose

• Sucrose

Which describes these molecules correctly?

• I=ribose

  II= amino acid

• I=glucose

  II= amino acid

• I=ribose

  II= fatty acid

• I=glucose

  II= fatty acid

Which of the following substances are organic?

I.   Phospholipids

II.  Oxygen

III. Carbon dioxide

• II and III only

• I only

• I and II only

• I, II and III

How many molecules of water are required to completely hydrolyse a polypeptide made up of 23 amino acids?

• 11

• 22

• 23

• 44

An enzyme is a biological catalyst, define the term catalyst.

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Outline the two aspects of metabolism.

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Blood is a water-based transport medium. Which property of water makes it a good transport medium?

• High specific heat

• Transparency

• Versatility as a solvent

• It has its greatest density at 4°C