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Pbiol 011: Basic Biology I Question Paper

Pbiol 011: Basic Biology I

Course:Certificate Of Pre-University Biology

Institution: Kabarak University question papers

Exam Year:2010

KABARAK UNIVERSITY

COURSE CODE: PBIOL 011

COURSE TITLE: BASIC BIOLOGY I

STREAM: SEMESTER ONE

DAY: FRIDAY

TIME: 9.00 – 11.00 A.M.

DATE: 10/12/2010

INSTRUCTIONS:
• Answer ALL Questions in Section A and Any TWO question from Section B.

SECTION A (40 MARKS)
1. a) Define the terms phenotype, genotype, locus, allele, heterozygous. (5 marks)
b) Distinguish among covalent bonds, ionic bonds and hydrogen bonds comparing
them in terms of the mechanism by which they form (5 marks)
2. a) Differentiate between the following terms:
(i) Primary growth and secondary growth
(ii) Phloem and xylem.
(iii)Pollination and fertilization
(iv) Ground tissue and epidermal tissue (10 marks)
3. a) Describe three functions of membranes.
b) Describe the properties of carbon that make it central component of organic
compound. (3 marks
c) What is a phospholipid? (10 marks)
4. a) Distinguish between Smooth and rough endoplasmic reticulum in terms of both
structure and function. (3 marks)
b) What are the components of a nucleotide? (3 marks)
c) Contrast Mitosis and Meiosis emphasizing the different outcomes. (4 marks)

SECTION B
5. By use of a labeled diagram describe the internal structure of a dicot leaf and describe
how this structure is related to its main functions of photosynthesis and gas exchange.
6. Normal hearing depends on the presence of one dominant of each of the two pairs of
genes, scene B & F. in a mating & two individual BbFf and BbFf individual home
many deaf offspring would there be? (Use Punnett Square) (10 marks)
7. Describe the life cycle of a flowering plant and double fertilization and discuss the
functions of the stem and some stem modification (15 marks)

Pbiol 011: Basic Biology I Question Paper

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