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Pbiol 011: Basic Biology Pre-University Question Paper

Pbiol 011: Basic Biology Pre-University

Course:Certificate Of Pre-University Biology

Institution: Kabarak University question papers

Exam Year:2009

KABARAK UNIVERSITY

UNIVERSITY EXAMINATIONS

2009/2010 ACADEMIC YEAR

FOR THE CERTIFICATE OF PRE- UNIVERSITY BIOLOGY

COURSE CODE: PBIOL 011

COURSE TITLE: BASIC BIOLOGY I

STREAM: SEMESTER ONE

DAY: TUESDAY

TIME: 9.00 – 11.00 A.M.

DATE: 01/12/2009

INSTRUCTIONS:
Answer ALL questions in section A and any TWO from section B

SECTION A: (40 MARKS)

1. (a) Distinguish between;
i. Ionic and covalent bonds
ii. Diffusion and osmosis
iii. Facilitated and active transport
iv. Glycosidic and peptide bonds
v. Growth and development (5 marks)

(b) Name three different polysaccharides and two types of lipids and state a function
for each. (5 marks)

2. (a) Describe three functions of membrane. (3 marks)
(b) Differentiate between smooth and rough endoplasmic reticulum in terms of both
structure and functions. (7 marks)

3. (a) What are the main differences between mitosis and meiosis. (3 marks)
(b) By use of simple diagrams explain the laws of segregation and independent
assortment. (7 marks)

4. (a) Describe the properties of water which result from its being a polar molecule.
(4 marks)
(b) Describe the properties of carbon that make it the central component of organic
compounds. (6 marks)

SECTION B: (30 MARKS)

5. By use of a labeled diagram describe the internal structure of a dicot leaf; and explain
how this structure is related to its main functions (photosynthesis and gas exchange)
(15 marks)

6. Discuss the various mechanisms that have evolved in different groups of plants that
prevent self pollination while ensuring cross pollination. (15 marks)

7. What is the probability that in families of six children, there will be;
(a) One boy and five girls
(b) Three boys and three girls
(c) All six girls (15 marks)

Pbiol 011: Basic Biology Pre-University Question Paper

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