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Abc 105: Introduction To Biochemistry Question Paper

Abc 105: Introduction To Biochemistry

Course:Bachelor Of Science In Food, Nutrition And Dietetics

Institution: South Eastern Kenya University question papers

Exam Year:2016

INSTRUCTIONS TO CANDIDATES
(a) Answer ALL the Questions in Section A
(b) Answer ANY TWO Questions in Section B
(c) Illustrate your answers with well labeled diagrams where appropriate

SECTION A (30 Marks)
1. State three biological functions of proteins.(3 marks)
2. Explain the difference between alpha- and beta- polysaccharides in relation to
their biological importance.(3 marks)
3. Using Haworth formula, distinguish between an alpha glucose and a beta glucose
molecule. (3marks)
4. State the name, linkage and properties of the molecule below:
(3marks)

(check attached document for diagram please)

5. State:
(a). The adaptive value of C3 photosynthesis.(1 mark)
(b). The problems with C3 photosynthesis when dealing with water loss and
photorespiration in warm climates.(1 mark)
(c). The types of plants that use C3 photosynthesis process.(1 mark)
6. Explain the structural differences betweenpurines and pyrimidines.
(3marks)
7. Differentiate between saturated and unsaturated fats.(3 marks)
8. (a). List four characteristics of water-soluble vitamins.(2 marks)
(b). What are the effects of vitamin D deficiency in the body. (1 mark)
9. Explain how amylose differ from amylopectin.(3marks)
10. Explain hydrolysis of a dipeptide molecule.(3 marks)

SECTION B (40 Marks)
11. Discuss how applications of biochemistry can impact economic growth.
(20 marks)
12. (a). Describe the structure of DNA molecule. (10 marks)
(b). Discuss the biological importance of lipids.(10 marks)
13. (a). 'Many important biomolecules are polymers'. Discuss. (10 marks)
(b). Describe how you can form sucrose and lactose molecules from beta
galactose, beta glucose and alpha fructose.(10 marks)
14. (a). Describe the formation of carbohydrate molecules in photosynthesis starting
from the absorption of light energy. (10 marks)
(b). Discuss how temperature affects photosynthesis. (10 marks)

Abc 105: Introduction To Biochemistry question paper

Abc 105: Introduction To Biochemistry Question Paper

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