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Pbiol 011: Basic Biology I Question Paper
Pbiol 011: Basic Biology I
Course:Pre-University Programme (Pre-University)
Institution: Kabarak University question papers
Exam Year:2012
KABARAK UNIVERSITY
UNIVERSITY EXAMINATIONS
2011/2012 ACADEMIC YEAR
FOR THE CERTIFICATE OF PRE-UNIVERSITY BIOLOGY
PBIOL 011: BASIC BIOLOGY I
DAY: MONDAY DATE: 26/03/ 2012
TIME: 9.00 – 11.00 A.M. STREAM: SEM 1
INSTRUCTIONS:
Answer ALL the questions in Section A and any TWO in Section B.
SECTION A: (40 Marks)
1. From the list of words at the bottom, select one word that best describes each of the
following statements. (10 mks)
(a) Having male and female reproductive structures on the same plant
(b) A genetic cross that take into account the behaviour of alleles of a single locus
(c) Intercellular organelle that are the sites of cellular respiration
(d) A chemical reaction results in the removal of one or more electons from an atom,
ion or compound.
(e) A non protein part of an entire enzyme structure organic in nature.
(f) A particle with one unit of negative charge and negligible mass located outside the
atomic nucleus.
(g) The genetic law that states that the alleles on different chromosomes are randomly
distributed in gametes
(h) Undifferentiated mass of embryonic tissue in actively growing regions of a plant
(i) A type of Nitrogen base with a single ring structure in a nucleotide
(j) A method of moving particles or debris into the cell from the environment
Endocytosis, meristem , independent assortment, co-enzyme, pyrimidine, purine,
monecious, electron, monohybrid cross, mitochondria, proton, oxidation
2. (a) Define the following terms: (5 mks)
(i) Nutrition
(ii) Metabolism
(iii) Ground tissue
(iv) Growth
(v) Interphase
(b) Use simple diagrams to illustrate the following: (5 mks)
Covalent bond, nucleotide, glycosidic bond, ionic bond, peptide bond,
3. In biology, structure is related to function. Describe how the structure of the stem
and root enable them carry out the processes of support transport and absorption.
(10 mks)
4. (a) Compare and contrast the general characteristics of prokaryotes and eukaryotes.
(4 mks)
(b) What are the main differences between DNA and RNA (3 mks)
(c) What is atriglyceride? (3 mks)
SECTION B: (30 Marks)
5. Describe how an Angiosperm flower is equipped to carry out the following: (15 mks)
(i) Insect pollination,
(ii) wind pollination
(iii) cross pollination
6. Draw a labeled diagram showing the internal structure of a dicot leaf and explain
how this structure is related to photosynthesis and transpiration. (15 mks)
7. In addition to proteins, carbohydrates and lipids, organisms require minerals and
vitamins. What are the functions of mineral and vitamins? (15 mks)
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