CIE iGCSE Co-Ordinated Science B4. Biological molecules Exam Style Questions Paper 2
Question
Which large molecule is made from many smaller glucose molecules?
(A) amino acid
(B) glycerol
(C) glycogen
(D) protein
▶️Answer/Explanation
Ans: C
Question
Which biological molecule contains the elements carbon, hydrogen, nitrogen and oxygen?
(A) carbohydrate
(B) fat
(C) oil
(D) protein
▶️Answer/Explanation
Ans: D
Question
A sample of food is tested for reducing sugars by adding Benedict’s solution and heating. What indicates that reducing sugars are present?
(A) a blue-black colour
(B) a brick-red precipitate
(C) a purple colour
(D) a white emulsion
▶️Answer/Explanation
Ans : B
Question
Analysis of a large food molecule shows that it contains the elements carbon, hydrogen and oxygen only.
Which food groups could this molecule be from?
(A) carbohydrates and fats only
(B) carbohydrates and proteins only
(C) fats and proteins only
(D) carbohydrates, fats and proteins
▶️Answer/Explanation
Ans: A