Get premium membership and access revision papers, questions with answers as well as video lessons.

Got a question or eager to learn? Discover limitless learning on WhatsApp now - Start Now!

Hfn 304: Food Biochemistry Question Paper

Hfn 304: Food Biochemistry

Course:Bachelor Of Science In Food, Nutrition And Dietetics

Institution: Kenyatta University question papers

Exam Year:2009

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2009/2010
FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF
SCIENCE IN FOODS, NUTRITION AND DIETETICS
HFN 304: FOOD BIOCHEMISTRY

DATE: Wednesday 23rd December, 2009 TIME: 2.00 p.m. – 4.00 p.m.

INSTRUCTIONS
Answer ALL questions.

1.
a)
Some amino acids are essential while others are not.

Which are the essential ones and why?

[10 marks]
b)
During food processing, the quality of a protein may be reduced.
(i)
What is protein quality?

[5 marks]
(ii)
How is protein quality reduced?

[5 marks]
2.
a)
(i)
What do you understand by hydrolysis?

[2 marks]

(ii)
Explain what is meant by condensation.

[2 marks]

(iii)
Give one example of 2 (a) (ii).

[1 mark]
b)
What
is
gelatinization? [5
marks]
c)
What
is
retrogradation? [5
marks]

d)
Give any four differences between amylase and amylopectin.

[5 marks]
3.
a)
Amylose and cellulose are both straight chain polymers of glucose.
Explain why one is digestible while the other is not.
[4 marks]
Page 1 of 2
b)
The Liver has a prominent role to play in the metabolism of all the major
food nutrients. Explain this statement in relation to carbohydrates,
proteins
and
lipids.
[6
marks]

4.
a)
What do you understand by the term Lipids.

[2 marks]
b)
How
are
the
lipids
classified?
[3
marks]

c)
Explain any two mechanisms of lipid deterioration.
[3 marks]

d)
Give one example each of how to prevent lipid deterioration in practice.

[2 marks]
5.
Differentiate between vitamins and hormones.

[10 marks]

……………………………

Page 2 of 2

Hfn 304: Food Biochemistry Question Paper

More Question Papers

Popular Exams