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Bioc 00113: Basic Biochemistry Question Paper

Bioc 00113: Basic Biochemistry

Course:Certificate In Animal Health And Production

Institution: Chuka University question papers

Exam Year:2013

CHUKA

UNIVERSITY

UNIVERSITY EXAMINATIONS
EXAMINATION FOR THE AWARD OF CERTIFICATE
IN ANIMAL HEALTH AND PRODUCTION

BIOC 00113: BASIC BIOCHEMISTRY

STREAMS: CERT (ANHE) TIME: 2 HOURS

DAY/DATE: FRIDAY 9/8/2013 11.30 AM – 1.30 PM
INSTRUCTIONS:
Answer Question ONE and any other TWO Questions

1. (a) What functions do the following structures play in eukaryotic cells?
[5 marks]
(i) Endoplasmic reticulum
(ii) Ribosomes
(iii) Golgi apparatus
(iv) Nucleus
(v) Cytoskeleton

(b) Classify the following amino acids according to whether they are neutral polar, neutral non-polar, acidic or basic. [4 marks]

(c) Briefly describe the following levels of structural organization of proteins.
[8 marks.

(i) Primary structure
(ii) Secondary structure
(iii) Tertiary structure
(iv) Quaternary structure

(d) Convert the following Fischer representation to Harworth formula and name the resultant anomers. [4 marks]

(e) List a major function of each of the following classes of lipids. [5 marks]

(i) Phospholipids
(ii) Oils
(iii) Waxes
(iv) Steroids
(v) Carotenoids

(f) Calculate the PH of the following: [4 marks]

(i) 5 x 10-9 M HCl
(ii) 6 x 10-2 M NaOH

Question 2 (20 Marks)

(a) Briefly discuss the structure of DNA. [10 marks]

(b) Give five metabolic products produced by the degradation of amino acids. [5 marks]

(c) Explain the 5 functions of proteins in the body . [5 marks]
Question 3 (20 Marks)

(a) Describe the major pathways in carbohydrate metabolism. [10 marks]

(b) Explain the five methods of denaturing proteins. [5 marks]

(c) Discuss the degradation pathways of fatty acids. [5 marks]

Question 4 (20 marks)

(a) Explain the following non-covalent interactions in biological systems. [8 marks]

(i) H-bonds
(ii) Ionic interactions
(iii) Hydrophobic interactions
(iv) Van der Waals interactions

(b) What properties of water makes it especially suitable for biological systems?
[2 marks]

(c) Discuss the structure and functions of the following lipids: [10 marks]

(i) Triacylglycerols
(ii) Wax esters
(iii) Phospholipids
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Bioc 00113: Basic Biochemistry Question Paper

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