Question

1. Riboflavin is an important nutrient required for a number of biochemical processes that produce energy in our bodies. Which of the following statements about riboflavin is NOT true the yellow color of a riboflavin containing solution is due to the absorption of light by the sugar component of the molecule it name is derived from the two principal compounds that make up the molecule we know as riboflavin the heterocycering component is a type of avonoid vering component is a type of flavonoid the sugar component of riboflaviniribitol Submit Answer Incorrect. Tries 1/2 Previous Tres This discussion is closed.

Answer 1

1. Riboflavin is an important nutrient required for a number of biochemical processes that produce energy in our bodies. Which of the following statements about riboflavin is NOT true

Answer: The yellow color of riboflavin containing solution is due to the absorption of light by the sugar component of the molecule

Reason: The yellow color of the riboflavin ring is due to the Flavin moiety

2. The term 'sample matrix' in analytical chemistry refers to

Answer: all compounds in the sample excluding the analyte

Explanation: Sample matrix refers to the components of the sample other than the analyte

5. Riboflavin absorbs UV-visible light making the electrons in the molecule more energetic. As a result, the more energetic electrons move from the 'ground state' electronic energy level to higher electronic energy levels known as 'excited states’. Which of the following statements is NOT true regarding how the ‘excited state’ molecule loses energy and returns to the 'ground state'?

Answer: b) non-radiative losses via phosphorescence

Reason: Phosphorescence involves radiation.