biological molecules

Question 1

name the solution used to detect proteins

Answer 1

biuret solution

Question 2

give 3 roles of OH- ions in the body

Answer 2

• controls PH
• catalyses reactions
• neutralises acids (e.g. stomach acid)

Question 3

give the x steps to prepare for using colorimeter

Answer 3

• create serial dilutions of solutions
• calibrate with distilled water
• select correct colour filter (+ give specific)
• samples in cuvette
• measure % light transmission/absorbance

Question 4

which colour light filter should be used to measure absorbance of glucose when using colorimeter?

Answer 4

red