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GNB502S - GENERAL BIOLOGY 1B - 1ST OPP - NOVEMBER 2024 |
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nAm I BIA UnlVERS ITV
OF SCIEnCE AnDTECHnOLOGY
FacultyofHealthN, atural
ResourceasndApplied
Sciences
Schoolof NaturalandApplied
Sciences
Departmentof Biology,
Chemistryand Physics
13JacksonKaujeuaStreet T: +264612072012
PrivateBag13388
F: +264612079012
Windhoek
E: dbcp@nust.na
NAMIBIA
W: www.nust.na
QUALIFICATION : BACHELOROF SCIENCE
QUALIFICATION CODE: 07BASC
LEVEL: 5
COURSE: GENERALBIOLOGY1B
COURSECODE: GNBS02S
DATE: NOVEMBER 2024
SESSION: 1
DURATION: 3 HOURS
MARKS: 100
FIRSTOPPORTUNITY: EXAMINATION QUESTION PAPER
EXAMINER:
MODERATOR:
DR JEYA KENNEDY
PROF LAMECH MWAPAGHA
INSTRUCTIONS:
1. Answer all questions on the separate answer sheet.
2. Please write neatly and legibly.
3. Do not use the left side margin of the exam paper. This must be allowed for the
examiner.
4. No books, notes and other additional aids are allowed.
5. Mark all answers clearly with their respective question numbers.
PERMISSIBLEMATERIALS:
1. Non-Programmable Calculator
ATTACHEMENTS
NONE
This paper consists of 5 pages including this front page
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:SECTIONA:
[ 25 MARKS]
QUESTION1: MULTIPLECHOICEQUESTIONS
[10]
Evaluate the statements in each numbered section and select the most appropriate answer
or phrase from the given possibilities. Fillin the appropriate letter next to the number of the
correct statement/phrase on your ANSWER SHEET.
1.1 An example of a domain is;
(a) Animalia
(b) Protista
(c) Fungi
(d) Eukarya
1.2 A microbiologist analyses chemicals obtained from an enveloped RNA virus that
infects monkeys and determines that the viral envelope contains proteins
characteristic of monkey cells, but not the virus. Which of the following is the most
likely explanation?
(a) the virus caused the monkey cell to produce proteins used to construct the viral
envelope
(b) the protein is due to an immunological response by the monkey's immune
system
(c) the viral envelope forms as the virus leaves the host cell
(d) the virus fools its host by mimicking its proteins
1.3 Bacteria can be classified according to their;
(a) type of cell walls
(b) methods of obtaining energy
(c) gram-staining characteristics
(d) alloftheabove
1.4 Which of the following is unicellular and heterotrophic?
(a) amoeba
(b) paramecium
(c) trypanosoma
(d) all of these
1.5 Which of the following represents the correct order of events in fungal sexual
reproduction?
(a) plasmogamy, meiosis, germination, and karyogamy
(b) meiosis, plasmogamy, karyogamy, and germination
(c) germination, meiosis, karyogamy, and plasmogamy
(d) plasmogamy, karyogamy, meiosis, and germination
GENERALBIOLOGY lB (GNBS02S}
ist Opportunity November 2024
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1.6 Which of the following is a plant with flagellated sperm and a sporophyte-
dominated life cycle?
{a) chytrid
{b) fern
{c) charophyte
{d) liverwort
1.7 Hyphae in bread mold that grow across the surface of the bread;
(a) rhizoid
{b) stolon
{c) sporangiophore
{d) sporangium
1.8 Roots and shoots lengthen through activity at _____
_
{a) apical meristems
{b) lateral meristems
{c) intercalary meristem
{d) Both a and b
1.9 Striated muscle is also called ---------
{a) cardiac muscle
{b) smooth muscle
{c) skeletal muscle
{d) involuntary muscle
1.10 Name the gymnosperms that have compound leaves.
{a) Ginkgophyta - ginkgo
{b) Cycadophyta - cycads
{c) Coniferophyta - conifer
{d) Gnetophyta - Ephedra
QUESTION 2: DISTINGUISH BETWEEN THE PAIRS OF THE FOLLOWING TERMS
[10)
Each answer carries two marks
2.1 Phylum and division
2.2 Viroids and prions
2.3 Staphylococcus and streptococcus
2.4 Sessile and sedentary animal
2.5 Chlorenchyma and aerenchyma
GENERALBIOLOGY18 {GNB502S)
pt Opportunity November 2024
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QUESTION3: ONE SENTENCESANSWERS
[S]
Each answer carries one mark
3.1 What are homologous structures?
3.2 What is the suffix for family names of viruses?
3.3 What term is used to describe the region of echinoderms where the mouth is located
(underside)?
3.4 Name the simple supportive cell in a flowering plant that is typically non-living.
3.5 What is the function of red bone marrow?
.~
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QUESTION4: SHORTQUESTIONS
The number of marks is given in brackets() at the end of each question.
[ 32 MARKS]
[10)
4.1 Why do F·cells always serve as DNA recipients during the process of conjugation
between two prokaryotic cells?
(2)
4.2 Identify two ecologically important characteristics of cyanobacteria.
(2)
4.3 List three main differences between viruses and living cells.
(2)
4.4 Write a brief note on the discovery of viruses.
(4)
QUESTION5: LONGERQUESTIONS
[22)
5.1 Draw and explain the types of bacteria classified based on movement.
(6)
5.2 How do fungi interact with humans, both positively and negatively?
(5)
5.3 In a tabular form, compare the differences between pteridophytes and angiosperms,
providing examples for each.
(5)
5.4 Which plant part is responsible for transporting water, minerals, and sugars to
different parts of the plant? Name and describe the two types of tissue that make up
this overall tissue and explain the role of each.
(6)
GENERALBIOLOGY1B (GNB502S)
ist Opportunity November 2024
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[ 43 MARKS]
QUESTION 6: FLOW CHART
[17]
6.1 Outline the classification of fungi with a flowchart and mention their common
names.
(7)
6.2 Draw the flowchart for the types and subtypes of connective tissues in the human
body.
(10)
QUESTION 7: ESSAY QUESTIONS
[26]
7.1 In tabular form, compare the general characteristics of multicellular algae based
on the following criteria:
(12)
Phylum and common
name
Habitats
Structure of Thall us
Pigments
Food Storage
Cell Wall
composition
Distinguish character
Example
7.2 Justify the classification and relationships of animal phyla based on the type of
body cavity, germ layers, and patterns of development.
(14)
END OF QUESTION PAPER
GENERALBIOLOGY18 (GNB502S)
l51 Opportunity November 2024
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