UNIVERSITI TUNKU ABDUL RAHMAN
CENTRE FOR FOUNDATION STUDIES
FOUNDATION IN SCIENCE
MAY 2014

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.
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(Source: Final examination, Sept 2013)
Q1. (a) Figure 1.1 shows the molecular structure of lactose (a disaccharide).

[pic]
Figure 1.1

i) Lactose can be broken down into its monomers by addition of water. Based on Figure 1.1, draw the molecular structure of the monomers. (2 marks)

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

(b) Figure 1.2 shows three different types of polysaccharides, B, C and D. Based on Figure 1.2, answer the following questions.

[pic]
Figure 1.2

i) Identify polysaccharides B and C. (2 marks)

ii) Name the shape of polysaccharide D. (1 mark)

iii) Compare and contrast polysaccharide C and D in terms of their monomer, shapes and functions. (3 marks)

(Source: Final examination, April 2013)
Q2. Sucrose is the organic compound commonly known as table sugar or saccharose. Figure 2.1 shows the structure of sucrose and the process in which sucrose is broken down into its monomers.

[pic]

Figure 2.1

(i) Identify monomer X, monomer Y and process A. (3 marks)

(ii) When Benedict test was performed on sucrose, it was observed that