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BSC410S - BASIC SCIENCE - 1ST OPP - NOV 2022 |
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nAmlBIA unlVERSITY
OF SCIEnCE Ano TECHnOLOGY
FACULTY OF HEALTH, NATURAL RESOURCES AND APPLIED SCIENCES
DEPARTMENT OF NATURAL AND APPLIED SCIENCES
QUALIFICATION: ALL PROGRAMMES
QUALIFICATION CODE: VARIOUS
LEVEL: 4
COURSE CODE: BSC410S
SESSION: NOVEMBER 2022
COURSE NAME: BASICSCIENCE
PAPER: THEORY
DURATION: 3 HOURS
MARKS: 100
FIRST OPPORTUNITY EXAMINATION PAPER (SDA)
EXAMINER(S) DR. VAINO INDONGO, MR. PERTUSPAULUSAND MR. TUWILIKA TOBIAS
MODERATOR: PROF.HABAUKA KWAAMBWA
INSTRUCTIONS
1.
Write all your answers in the answer booklet provided.
2.
Read the whole question before answering.
3.
Begin each question on a new page.
PERMISSIBLE MATERIALS
Non-programmable Scientific Calculator
THIS QUESTION PAPER CONSISTS OF 12 PAGES
(INCLUDING THIS FRONT PAGE)
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SECTION A: BIOLOGY
[35].
QUESTION 1:
[20]
Question type: Multiple choices. Read the questions carefully, choose and write the correct
letter corresponding to the correct answer. Each question weighs 2 marks.
1.1 An organism's scientific name consists of its _____
_
(2)
A. class name and its family name.
B. kingdom name and its phylum name.
C. genus name and its species name.
D. phylum name and its species name.
1.2 The organic and inorganic materials in all the organisms will eventually return to the
environment by the action of;
(2)
A. primary consumers.
B. producers.
C. decomposers.
D. secondary consumers.
1.3 In children, a diet lacking Vitamin D and calcium can be linked to which of the following
conditions?
(2)
A. rickets
B. scurvy
C. osteoporosis
D. cardiovascular disease
1.4 The hydrolysis of lactose will yield which of the following monosaccharides?
(2)
A. glucose and galactose
B. lactic acid and carbon dioxide
C. sucrose and fructose
D. glucose and fructose
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1.5 Which of the kingdoms of living things has members that lacks both chloroplast and cell
walls?
(2)
A. Plantae
B. Animalia
C. Fungi
D. Protista
1.6 During interspecific competition, a competition is between __ _
(2)
A. organisms of different species
B. abiotic organisms
C. strong and weak organisms
D. organisms of the same species
1.7 Which of the listed elements make up a carbohydrate?
(2)
A. hydrogen, calcium, oxygen
B. hydrogen, oxygen,carbon
C. carbon, potassium, oxygen
D. calcium, potassium, oxygen
1.8 Polysaccharides with more than 10 monomers can be hydrolysed to yield three different
subunits which are----
(2)
A. monosaccharides, dipeptide and oligosaccharides
B. glycosidic bonds, monosaccharides and amino acids
C. amino acids, monosaccharides and disaccharides
D. monosaccharides, disaccharides and oligosaccharides
1.9 The role of fermentation during yoghurt production is __ _
(2)
A. to convert glucose into ethanol and carbon dioxide
B. to convert lactose into lactic acid to coagulate the milk protein
C. to preserve the milk for spoiling
D. none of the above statements
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1.10 In which way does yoghurt provide us with the health benefit of boosting our immune
system?
(2)
A. Yoghurt is rich in calcium.
B. Yoghurt has anti-inflammatory properties.
C. Yoghurt provides the body with proteins which are for making antibodies.
D. Both A and Bare correct.
QUESTION 2
[15]
Question type: Structured questions.
2.1 State any two domains in which living organisms are classified.
(2)
2.2 In which way do the producers and decomposers sustain the smooth functioning of the
ecosystem?
(4)
2.3 There are many people who think that fats are bad for you. Though it is true in some
sense, there is still a need for some fat in the diet. Explain, with three reasons, why fats
are important in your body?
(3)
2.4 Biotechnology is a broad field of science, which uses living things like plants, animals and
microorganisms and their biological processes to make useful products or perform
certain functions. It is used in medicine, agriculture, mining and industry.
2.4.1 Explain fermentation?
(2)
2.4.2 What gives yogurt the sour taste after fermentation?
(1)
2.4.3 What determines the end products of fermentation?
(1)
2.4.4 What is the role oftime and temperature during fermentation?
(2)
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SECTION B: CHEMISTRY
[30]
QUESTION 3:
[20]
Question type: Multiple choices. Read the questions carefully, choose and write the correct
letter corresponding to the correct answer. Each question weighs 2 marks.
3.1 Which of the following is a quantitative measurement?
(2)
A. amount of matter in an object
B. fluorescence of different objects
C. colour change in different objects
D. coarseness of a powder
3.2 Convert 150 °F to Kelvin.
(2)
A. 23.15
B. 65.56
C. 338. 71
D. 423.15
3.3 Given that 85.0 K is the accepted value for a particular measurement, which of the
following experimental trials is precise and accurate?
(2)
A. 85.0 K, 87.7 Kand 89.9 K
B. 85.0 K, 84.8 Kand 84.9 K
C. 83.0 K, 85.0 Kand 88.0 K
D. 85.0 K, 89.0 Kand 90.0 K
3.4 How many significant figures are in 100.00?
(2)
A. 2
B. 3
C. 4
D. 5
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3.5 Use the suitable significant figures calculation's rule to solve this mathematical
operation; 6.23 x 2.224
(2)
A. 13.8
B. 13.855
C. 13.85
D. 13.9
3.6 Which of the three states of matter possess these features? definite shape, definite
volume, small thermal expansion and incompressible.
(2)
A. Liquid
B. Solid
C. Gas
D. A and B
3. 7 Which of the following is charge free?
(2)
A. proton
B. electron
C. neutron
D. none of the above
3.8 Which ion do bases contain?
(2)
A. W
B. OH-
C. H30
D. NH3
3.9 One of the physical properties that all acids have is ___ _
(2)
A. sour taste
B. bitter taste
C. colourful
D. colourless
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3.10 Which of the given acids is used as a treatment agent of bone marrow and scurvy
diseases?
{2}
A. Acetic acid
B. Hydrochloric acid
C. Ascorbic acid
D. Nitric acid
QUESTION 4
[10]
Question type: Structured questions.
4.1 An experiment to determine the boiling point of water, the experimental value measured
is 378.2 Kand the Accepted /true value is 383.15 K. Determine the error value.
{2}
4.2 Define the following terms; element, mixture and compound
{3}
4.3 State 2 physical properties of metals
(2)
4.4 Complete the table below based on the provided experimental results.
(3)
Indicator
Red litmus paper
Blue litmus paper
Red litmus paper
Blue litmus paper
Results
Blue
Red
c)
Remains blue
Solution
a)
b)
Acid
Base
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SECTION C: PHYSICS
[35]
QUESTION 5:
[20]
Question type: Multiple choices. Read the questions carefully, choose and write the correct
letter corresponding to the correct answer. Each question weighs 2 marks.
5.1 Which one is a renewable source of energy?
(2)
A. nuclear energy
B. natural gas
C. biomass
D. coal
5.2 Which of the following is a correct order for generation of electricity from coal?
(2)
A. Supplying electricity heating water
power for usage around the country
producing steam
generating electrical
B. Fusion of coal heating
producing steam turning turbines electrical
power sent around the country
C. Crushing burning heating water producing steam turning turbines
generating electrical energy
D. Burning crushing heating water producing steam electrical power
rotating generators turning turbines
5.3 Which of the following is true for fossil fuels?
(2)
A. It is obtained from remains of plant and animal materials.
B. It can also be generated from biomass
C. It is a tidal source of energy
D. It can kill flocks of birds.
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5.4 An electrical pump uses energy of 500 J to fill up a tank with water at a height of 4 meters
above the ground. Using a gravitational acceleration of 10 m/s 2, what would be the mass
of water?
(2)
A. 125 kg
B. 50 kg
C. 12.5 kg
D. 40 kg
5.5 During the ascent phase of a rep of the bench press, the lifter exerts an average vertical
force of 200 N against a barbell while the barbell moves 0.25 m downwards (Figure 1}.
How much work was done by the lifter to the barbell?
(2)
BENCH-PRESS
A. - 0.8 J
C. 800 J
Fig. 1
B. 200 J
D. - 50 J
5.6 A 300 gram ball is launched into the air with an initial velocity of 30 centimetres per
second. Which statement is NOT true about the ball when it reaches maximum height? (2)
A. Kinetic energy is zero.
B. All kinetic energy is converted into gravitational energy.
C. Potential energy is zero.
D. Total energy is equal to potential energy of a ball.
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5.7 The flow of the electrical charges in the circuit is;
(2)
A. resistance
B. capacitance
C. electric current
D. voltage
5.8 Good conductors of electricity have;
(2)
A. high resistance.
B. low resistance.
C. single route for current to flow.
D. more alternate routes for current to flow.
5.9 When electrical components are connected such that more one path for charges to,
then a
is formed.
(2)
A. parallel connection
B. series connection
C. both series and parallel connection
D. none of the above
5.10 When resistors are connected in parallel, total resistances in the circuit will __
A. remain the same
B. increase
C. decrease
D. be shared
. {2)
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QUESTION 6:
[15]
Question type: Structured questions.
6.1 The diagram below (Figure 2) shows a ball rolling from A to G. The ball starts at point A
and rolls through to point G.
Fig. 2
(i) At which letter does the ball has the highest potential energy?
(1)
(ii) At which does the ball has the maximum kinetic energy?
(1)
(iii) At point G, the ball has come to a stop. What could be the reason that it could
not return back to its original height?
(1)
6.2 Study the speed-time graph below (Figure 3) representing a journey of a car and answer
the questions relating to the graph.
Speed(mf 1)
Graphof Speedvs Time
18 ..........................................................................................................................
7 ..............................:...;.;.>..-.--.,-.-.-.--.f.....B........
A
1
5
9
11
Fig. 3
(i)
Describe the motion over the parts B of the graph using one or more of the
following terms: constant, zero, speed, increasing, decreasing, deceleration
and acceleration
(1)
(ii) Calculate the acceleration over part C of the graph.
(2)
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(iii) Calculate the total distance travelled over part A only.
(2)
6.3 Distinguish a vector and a scalar.
(2)
6.4 State the 3 effects of forces when applied to a stationary object.
(3)
6.5 A moving bicycle of mass 4 kg was accelerated at 2.5 m/s 2. Calculate the force applied to
a bicycle.
(2)
END
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