Invetigation of Action of Saliva and Hydrochloric Acid in Two Carbohydrate Solution

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UNIVERSITI TUNKU ABDUL RAHMAN
CENTRE FOR FOUNDATION STUDIES
FOUNDATION IN SCIENCE
JAN 2016

FHSB 1214
BIOLOGY I

TUTORIAL 1
BASIC MOLECULES OF CELLS I

Instructor’s Guide:
1. Standard answers are not encouraged. Discuss with the students and lead them to the correct answer.
2. Allow and push the students to express and explain the answers, at the same time, correct their mistakes or concepts.
3. If the tutorial questions are not yet covered in the lecture, it should be carried forward to the next tutorial.
__________________________________________________________________________________

(Source : Final Examination, Apr 2015)
Q1. (a) Figure 1 shows structures of some functional groups present in biological molecules


Figure 1

Based on Figure 1, answer the following questions.

(i) Identify the functional groups represented by C, D and E respectively.
(3 marks)





(ii) Given two carbohydrates molecules I and II, where by carbohydrate I contains chemical group A and carbohydrate II contains chemical group B, state ONE (1) possible carbohydrate for each carbohydrate molecule I and II. (2 marks)




(iii) Briefly explain how functional groups may affect the functions of biological molecules. (2 marks)













(Source: Final examination, Sept 2013)
Q2. (a) Figure 2.1 shows the molecular structure of lactose (a disaccharide).

Figure 2.1

(i) Lactose can be broken down into its monomers by addition of water. Based on Figure 2.1, draw the molecular structure of the monomers.
(2 marks)



(ii) Name TWO (2) monomers referring above (i). (2 marks)



(b) A type of syrup was added to sweeten beverages. This syrup contains monosaccharide A, which is an isomer of glucose. What is monosaccharide A? ...