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UNIVERSITI TUNKU ABDUL RAHMAN
CENTRE FOR FOUNDATION STUDIES
FOUNDATION IN SCIENCE
MAY 2015

FHSC 1214
FUNDAMENTALS OF CELL BIOLOGY

TUTORIAL 3
BIOLOGICAL MOLECULES III

Student’s Guide for Tutorial:
At university level, the tutor facilitates student learning without spoon-feeding. Therefore, you are expected to:

* Read your textbook, attempt the questions before the tutorial * You may enter the class and sign your attendance after showing your tutor that all tutorial questions have been completed; even if you don’t know how to do, write something - you’re not advised to leave answers blank in the finals. * Write answers on board if you wish to receive tutor feedback
(no answer, no feedback) * Be independent: consult textbooks or dictionaries on your own first before asking the tutor * All questions are compulsory. 1 mark may reflect 1 answer point.
(No half mark is awarded in the finals marks)

[Source: Final Examination for Jan 2015] Q1. Figure 1 is an idealised schematic of the DNA double helix. Figure 1 Based on Figure 1, answer the following questions. (a) Identify bond C and name TWO(2) functional groups that are involved in its formation. (3 marks)

(b) The Watson-Crick DNA double helix model is often described as ‘antiparallel’. Explain why. (2 marks)

(c) Given that the sequence of one of the DNA strands is 5’– ATGA – 3’, deduce the base sequence of its complementary mRNA molecule. (1 mark)

(d) DNA and RNA are made up of deoxyribonuceotides and ribonucleotides respectively. State TWO (2) structural differences of deoxyribonucleotides and ribonucleotides. (2 marks)

(e) Studies have shown that the DNA sequences of bacteria that live in thermal springs usually

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