Obtaining Natural Products

Taking into account environmental factors, which of the following is true about the secondary metabolites from the same species but from different locations?

• Same species contains the same secondary metabolites in type and quantity .

• Same species contains secondary metabolites of the same type but in different quantities.

• Same species contains secondary metabolites of different types but in the same quantity.

• Same species contains different secondary metabolites both in type and quantity.

True or False? Natural products can only be sourced from plants.

• True

• False

Which of the following is true about the distribution of secondary metabolites in the flesh of the fruit, rind and seeds of a plant species?

• They must contain the same secondary metabolites.

• They certainly contain different secondary metabolites.

• Secondary metabolites may be the same or different.

• All parts contain similar flavonoids.

Which of the following solvents will you choose first when doing an extraction from a plant material?

• hexane

• methanol

• water

• dichloromethane

How do you recover the extracted component from the loaded, supercritical CO₂ used in extraction?

• Run the fluid through a filter paper.

• Depressurize the fluid.

• Include a seed solid in the recovery tank.

• Lower the fluid temperature.

Which of the following techniques is most suitable to use to separate polar components of an extract?

• Reverse Phase High-Performance Liquid Chromatography

• Thin Layer Chromatography

• Column Chromatography

• Flash Chromatography

What do you call the plant material left after extraction?

• Eluate

• Residue

• Marc

• Concentrate

Which of the following techniques will give you the molecular weight of a compound?

• Nuclear Magnetic Resonance Spectroscopy

• Infrared Spectroscopy

• UV-Vis Spectroscopy

• Mass Spectroscopy

Which of the following techniques will tell you the functional groups present in a compound?

• Nuclear Magnetic Resonance Spectroscopy

• Infrared Spectroscopy

• UV-Vis Spectroscopy

• Mass Spectroscopy

True or False: Circular Dichroism can be used to determine the arrangement of atoms of a crystalline solid in three dimensional space.

• True

• False