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Biology
WAEC / WASSCE 2007
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Biuret’s test is carried out on a food substance to indicate the presence of
A
vitamins B
B
fats
C
proteins
D
starch
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #20930)
Biology
WAEC / WASSCE 2007
Variety of Organisms & Classification of Living Things
In a test for non-reducing sugars like sucrose, what is the significance of adding dilute hydrochloric acid to the original sugar solution? To
A
hydrolyse the non-reducing sugar
B
accelerate he rate of the reaction
C
stabilize the medium
D
sterilize the solution
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #20931)
Biology
WAEC / WASSCE 2007
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
'The colour that is associated with a positive iodine test is
A
brown
B
red
C
blue-black
D
yellow
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #20932)
Biology
WAEC / WASSCE 2007
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
Enzymes can be inactivated by certain chemical substances in the body called
A
catalysts
B
inhibitors
C
substrates
D
activators
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Enzyme inhibitors are substances which alter the catalytic action of the enzyme and consequently slow down, or in some cases, stop catalysis.
Source: Myschool Past Questions Archive (Record #20933)
Biology
WAEC / WASSCE 2007
Variety of Organisms & Classification of Living Things
Use the following equations to answer the question below
I - Boiled saliva + starch → X
II - Fresh saliva + starch → Y
What substances do X and Y represent?
A
X = Maltose and Y = Sugar
B
X = Starch and Y = Maltose
C
X = Sugar and Y = Starch
D
X = Maltose and Y = Starch
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #20934)
Biology
WAEC / WASSCE 2007
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Which of the following enzymes is not one of the main classes of enzymes?
A
Sucrase
B
Amylases
C
Proteases
D
Lipases
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #20935)
Biology
WAEC / WASSCE 2007
Digestive System & Feeding Mechanisms
Which of the following enzymes does not belong to proteases?
A
Sucrase
B
Pepsin
C
Trypsin
D
Erepsin
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #20936)
Biology
WAEC / WASSCE 2007
Variety of Organisms & Classification of Living Things
Which of the following protozoans feeds parasitically
A
Paramecium
B
Chlamydomonas
C
Plasmodium
D
Euglena
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #20937)
Biology
WAEC / WASSCE 2007
Respiration & Gaseous Exchange
Which of the following features of the tadpole indicates that the animal is herbivorous? Possession of
A
operculum
B
muscular tail
C
long coiled intestine
D
internal gills
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #20938)
Biology
WAEC / WASSCE 2007
Basic Ecological Concepts, Ecosystems & Biomes
The term community is defined as
A
the different groups of plants and animals in the same area and interacting with each other
B
the consumers and producers living in a habitat
C
living organisms interacting with physical factors of an environment
D
animals which mutually derive benefit from their association.
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #20939)
Biology
WAEC / WASSCE 2007
Basic Ecological Concepts, Ecosystems & Biomes
Which of the following organisms are the producers in an aquatic habitat?
A
Benthons
B
Phytoplanktons
C
Zooplanktons
D
Nektons
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #20940)
Biology
WAEC / WASSCE 2007
Basic Ecological Concepts, Ecosystems & Biomes
Wind speed is measured with
A
a maximum-minimum thermometer
B
a hygrometer
C
a wet and dry bulb hygrometer
D
an anemometer
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #20941)
Biology
WAEC / WASSCE 2007
Basic Ecological Concepts, Ecosystems & Biomes
Solution
The amount of energy passed from one trophic level to the next decreases because
A
many organisms are present at the first trophic level
B
many organisms occur at the higher trophic level
C
more energy is conserved at lower trophic levels
D
parts of the organisms remain unutilised at each trophic level
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
The energy conversion efficiency is higher at lower trophic levels even though a significant amount of energy is lost as heat, waste and other processes. Thus, more energy is conserved at lower trophic levels.
Source: Myschool Past Questions Archive (Record #20942)
Biology
WAEC / WASSCE 2007
Basic Ecological Concepts, Ecosystems & Biomes
Which of these values in kj/m2 likely represents the energy content of the producers in a habitat?
A
5033
B
100
C
12
D
10
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #20943)
Biology
WAEC / WASSCE 2007
Population Ecology, Habitats & Conservation
The major pollutant around airport residential areas is
A
oil spillage
B
soot
C
noise
D
dust
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #20944)