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Basic Biology Question Paper

Basic Biology

Course:Certificate In Biology (Biology)

Institution: Kabarak University question papers

Exam Year:2008

Page 1 of 3
KABARAK UNIVERSITY
UNIVERSITY EXAMINATIONS
2008/2009 ACADEMIC YEAR
FOR THE CERTIFICATE OF PRE-UNIVERSITY BIOLOGY
COURSE CODE: PBIOL 011
COURSE TITLE: BASIC BIOLOGY
STREAM: PRE – UNIVERSITY SEM ONE
DAY: WEDNESDAY
TIME: 8.30 – 10.30 A.M.
DATE: 10/12/2008
INSTRUCTIONS:
Answer all questions in section A and any two questions in section B
PLEASE TURN OVER
Page 2 of 3
Section A (40 marks)
1. (a) Name two major organelles found in an Eukaryotic cell and state their functions
(2 marks)
(b) Explain how the following processes affect the functioning of living cells.
(i) Diffusion
(ii) Osmosis
(iii) Facilitated diffusion
(iv) Selective permeability (8 marks)
2. What do you understand by the following features of life;
(a) Organization
(b) Growth and development
(c) Adaptation
(d) Homeostasis (10 marks)
3. (a) Explain the factors that make carbon the appropriate constituent of the backbone
o f l ivi ng m att er. (5 marks)
(b) What are the structural differences between DNA and RNA. (5 marks)
4. (a) Division of labour among various types of cells in plants is important. Name
the cells that are responsible for the following tasks.
(i) Collection of solar energy
(ii) Transporting water
(iii) Cell division and production of new protoplasm
(iv) Water retention
(v) Certain pigments to attract pollination (5 marks)
( b) Explain briefly how buffers help to maintain body homeostasis. (5 marks)
Page 3 of 3
Section B (30 Marks)
5. (a) What is TURGOR PRESSURE and what is its significance in plant cells? (3 marks)
(b) By use of a diagram explain the general structure of the green leaf. (5 marks)
( c) How is this structure related to photosynthesis and transpiration? (7 marks)
6. (a) In a hyposthetical segment of DNA, the sequence of basis is AGGCTTGATCCG
What would be the sequence of bases in the message RNA strand? (7 marks)
(b) Sexual reproduction produces offspring that are not identical to each other and to
p a r e n ts. How does meiosis create variability? (8 marks)
7. (a) Explain the terms:
(i) Interior ovary
(ii) Superior ovary
(iii) Actinomorphic flower
(iv) Zygomorphic flower (8 marks)
(b) How is each of these modifications selectively advantageous? (7 marks)

Basic Biology Question Paper

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