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GNB502S - GENERAL BIOLOGY 1B - 2ND OPP - JAN 2023 |
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n Am I BI A u n IVER s ITY
OFSCIEnCE Ano TECHn OLOGY
FACULTYOF HEALTH,APPLIEDSCIENCESAND NATURALRESOURCES
DEPARTMENTOF NATURALAND APPLIEDSCIENCES
QUALIFICATION:BACHELOROF SCIENCE
QUALIFICATIONCODE: 07BOSC
LEVEL:6
COURSECODE: GNB502S
COURSENAME: GENERAL BIOLOGY lB
SESSION:JANUARY2023
PAPER:THEORY
DURATION: 3 HOURS
MARKS: 100
SUPPLEMENTARY/ SECOND OPPORTUNITY EXAMINATION QUESTION PAPER
EXAMINER(S} DR JEYA KENNEDY
MODERATOR: DR LAMECH MWAPAGHA
INSTRUCTIONS
1. Write clearly and neatly
2. Number the answers clearly
3. All written work MUST be done in blue or black ink
4. No books, notes and other additional aids are allowed
5. Mark all answers clearly with their respective question numbers
6. Draw diagrams wherever necessary
PERMISSIBLE MATERIALS
None
THIS QUESTION PAPERCONSISTSOF 6 PAGES
(Including this front page)
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QUESTION 1:
Multiple choices
Each answer carries one mark
1.1 Which structures allow amoebas to move?
a) cilia
b) contractile vacuoles
c) flagella
d) pseudopods
1.2 Peptidoglycan is a chemical compound found in the cell walls of;
a) most Eubacteria
b) most Archaea
c) prions
d) most viroids
1.3 Which of the following is considered to be an animal-like protist?
a) slime mold
b) amoeba
c) euglena
d) dinoflagellate
1.4 Seedless vascular plants possess______
to conduct water and dissolved
minerals and ___
to conduct dissolved sugar.
a) cuticle; xylem
b) phloem; stoma
c) phloem; xylem
d) xylem; phloem
1.5 This plant hormone interacts with auxin during the formation of callus in tissue
culture;
a) Florigen
b) Gibberellin
c) Cytokinin
d) Ethylene
1.6 A coelom is a body cavity completely lined with;
a) epithelium
b) ectoderm
c) mesoderm
d) endoderm
1.7 Which of these is not an endocrine gland?
a) pancreas
b) testes
c) salivary gland
d) parathyroid
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1.8 From what type of tissue is endocrine and exocrine glands are formed?
a) connective
b) blood
c) muscle
d) epithelial
1.9 Which term do we use to describe the region of the body that contains an animal's
tail?
a) Ventral
b) Posterior
c) Anterior
d) Dorsal
1.10 To prevents duplicated names all names must be approved by ___ _
a) International Zoological nomenclature
b) International Code for Binomial Nomenclature
c) International law congresses
d) International Naming Congresses
1.11 Gram Positive bacteria will stain;
a) Pink
b) Purple
c) Brown
d) red
1.12 In sexual reproduction {conjugation) bacteria exchange information through the
----
of the bacteria;
a) flagella
b) cell wall
c) pilli
d) capsule
1.13 An F+bacterial cell --------
a) has many antibiotic resistance genes
b) acts as a recipient during conjugation
c) uses fimbriae to transfer DNA
d) acts as a donor during conjugation
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QUESTION 2:
Distinguish between the pairs of the following terms.
[6]
Each answer carries two marks
2.1 Staphylococcus and streptococcus
2.2 Calcitonin and parathyroid hormone
2.3 Epiphytes and epipetric
QUESTION 3:
One sentences answers
[3]
Each answer carries one mark
3.1 Name who was the first taxonomist and what two groups did he place organism in?
3.2 What Domain of organisms probably evolved first?
3.3 How do scientific names appear in print?
QUESTION 4:
Short questions
[7]
4.1 What are hormones? State one function of each of the following hormones:
(i) Thyroxine (ii) Insulin
(3)
4.2 How are pteridophytes different from the angiosperm give some examples?
(4)
QUESTION 5:
Longer questions
[20]
5.1 What is called as germ layers and name their function?
(8)
5.2 In the tabular column form compare protostomes and deuterostomes ang give two example
each.
(5)
5.3 In a tabular form how do you distinguish the characteristic of protist
classification.
(7)
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QUESTION 6:
[23]
Structures and functions
6.1 Use the diagram to answer the questions below.
a
b
C
d
II
\\.
/ f' ,, • 'f ( \\
~-<~!®>®®.®
• :s-----c:-::
: • 't
6.1.1 The figure above shows a diagram of a tissue, is it a simple or complex
permanent tissue and is it a living, dead or both?
(2)
6.1.2 Name the associated structure of companion cell.
(1)
6.1.3 Name an enucleated plant cell in the above diagram.
(1)
6.1.4 Mention the 4 components of the above diagram.
(2)
6.1.5 What does the figure above transport?
(1)
6.1.6 Identify the structures labeled g, f and c in the diagram.
(2)
6.1.7 Name the small opening that connect the companion cells and the sieve tube
cells, which help to load sugar.
(1)
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6.2 Use the diagram to answer each question.
Identify the structures labelled a - c and name the type of hyphae each
drawing represents.
(5)
a
b
. ·: ,· :·
..
-----
d
e
6.2.1 What is mycelium is made of?
(1)
6.2.2 All hyphae within a mycelium share ____
so materials can move quickly. (1)
6.2.3 When conditions are not favourable, which form of reproduction
(sexual or asexual) is preferred by fungi?
(1)
6.2.4 Name all the phylum does the organisms in the diagram d belong to and
mention the common name of all the organisms?
(3)
6.2.5 What are the uses of hyphae.
(2)
QUESTION 7:
Essay questions
[28]
7.1 Describe both the lytic cycle and the lysogenic cycle of bacteriophages and give
2 examples of each.
(12}
7.2 Name and briefly describe the four subdivisions of gymnosperms.
(16}
THE END
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