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Chemistry
UTME / JAMB 2003
Organic Chemistry I: Hydrocarbons & Crude Oil
Solution
The principal constituent of natural gas is
A
methane
B
ethane
C
propane
D
butane
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
Natural gas is mostly methane, with small amounts of other alkanes like ethane, propane, butane, and pentane. It may also contain trace amounts of contaminants like water vapour, carbon(iv)oxide, nitrogen, and hydrogen sulphide. The main constituent of natural gas is methane, CH\(_4\), a simple hydrocarbon compound.
Source: Myschool Past Questions Archive (Record #2531)
Chemistry
UTME / JAMB 2003
Stoichiometry, Mole Concept & Volumetric Analysis
Solution
2HCI(ag) + CaCO\(_3\)(s) → CaCl\(_2\)(s) + CO\(_2\)(g) + H\(_2\)O(l). From the reaction above, which of the curves in the diagram represents the production of carbon (IV) oxide as dilute HCI is added?
A
L
B
M
C
N
D
P
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
The reaction of calcium carbonate with hydrochloric acid is said to be first order with respect to hydrochloric acid. This is because the rate depends upon the concentration of hydrochloric acid to the power one. As more HCl is being added,more CO\(_2\) is being produced but gradually evolves being a gas, as time goes on. The rate of the reaction is directly proportional to the concentration of a single reactant. This means that if the concentration of the reactant doubles, the rate of the reaction also doubles.
Source: Official Exam / Past Question Archive
Chemistry
UTME / JAMB 2003
Stoichiometry, Mole Concept & Volumetric Analysis
Diagram
Solution
2HCI(ag) + CaCO\(_3\)(s) → CaCl\(_2\)(s) + CO\(_2\)(g) + H\(_2\)O(l). From the reaction above, which of the curves in the diagram represents the production of carbon (IV) oxide as dilute HCI is added?
Attached Figure / Diagram
A
L
B
M
C
N
D
P
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
The reaction of calcium carbonate with hydrochloric acid is said to be first order with respect to hydrochloric acid. This is because the rate depends upon the concentration of hydrochloric acid to the power one. As more HCl is being added,more CO\(_2\) is being produced but gradually evolves being a gas, as time goes on. The rate of the reaction is directly proportional to the concentration of a single reactant. This means that if the concentration of the reactant doubles, the rate of the reaction also doubles.
Source: Myschool Past Questions Archive (Record #31614)
English Language
UTME / JAMB 2003
Reading Comprehension, Summary & Composition
The word debutants, as used in the passage, means
A
first -timers
B
giant killers
C
hard-fighters
D
under-dogs
medium Difficulty
Verified Correct Answer: Option A
Grammar & Contextual Explanation
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Official Exam / Past Question Archive
Biology
UTME / JAMB 2003
Cell Structure, Organization & Cell Division
Diagram
Solution
The structure that are common to both plant and animal cells are labelled
Attached Figure / Diagram
A
IV and I
B
II and IV
C
II and III
D
I and II
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Parts labelled
I - Vacuole
II - Nucleus are common to both plant and animal cells.
(See diagram above)
Source: Myschool Past Questions Archive (Record #7213)
Biology
UTME / JAMB 2003
Variety of Organisms & Classification of Living Things
Diagram
Solution
Food is stored in the structure labelled
Attached Figure / Diagram
A
III
B
I
C
IV
D
II
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Food is stored in the pyrenoids, which are subcellular parts of the chloroplasts in the cells of the spirogyra. Spirogyra is a photosynthetic autotroph, meaning it makes its own food using energy from sunlight. The chloroplasts in spirogyra cells contain chlorophyll, which absorbs energy from sunlight to synthesize glucose. Excess glucose is then converted to starch and stored in the pyrenoids.
The part labelled IV is the pyrenoid.
Source: Myschool Past Questions Archive (Record #7214)
Biology
UTME / JAMB 2003
Reproduction in Plants & Animals
One distinctive feature in the life history of liverworts is that they exhibit
A
Alternation of generation
B
Vegetative reproduction
C
Asexual reproduction
D
Sexual reproduction
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 #7215)
Biology
UTME / JAMB 2003
Basic Ecological Concepts, Ecosystems & Biomes
Diagram
A noticeable adaptation of the animal to its aquatic habitat is the possession of
Attached Figure / Diagram
A
a wide mouth
B
large eyes
C
webbed digits
D
fore limbs
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 #7216)
Biology
UTME / JAMB 2003
Cell & Its Environment (Diffusion, Osmosis & Transport)
Diagram
Solution
The process of water loss and intake indicated by the arrow labelled I and II are respectively
Attached Figure / Diagram
A
exhalation and osmosis
B
urination and diffusion
C
osmosis and diffusion
D
evaporation and osmosis
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
- Most frog species show little resistance to evaporative water loss (EWL) through their skin.
- The movement of water across membranes from areas of high concentration (lots of water) to areas of low concentration (less water) is called osmosis. The reason frogs do not have to actively drink water and instead can sit in a bowl of water and absorb water passively is due, in large part, to osmosis.
- That is, frogs do not drink like we do; they absorb water directly through their skin in an area known as the 'drinking patch' located on their belly and the underside of their thighs.
Source: Myschool Past Questions Archive (Record #7217)
Biology
UTME / JAMB 2003
Variety of Organisms & Classification of Living Things
The umbrella shaped fruiting body of a fully developed mushroom is the
A
Pileus
B
Mycelium
C
Basidium
D
Stipe
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 #7218)
Biology
UTME / JAMB 2003
Variety of Organisms & Classification of Living Things
The similarity among organisms belonging to the same group will be least within each
A
family
B
order
C
kingdom
D
species
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 #7219)
Biology
UTME / JAMB 2003
Variety of Organisms & Classification of Living Things
Solution
Hermophroditic reproduction can be found among the
A
Arthropods and nematodes
B
Pisces and amphibians
C
Annelids and molluscs
D
coelenterates and platyhelminthes
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Most of the organisms belonging to this phylum Coelenterata appear to be unisexual with exceptions of few hermaphrodites. However, they reproduce by budding.
On the other hand, Annelids and Molluscs are Hermaphrodites. The correct option is Option C.
Source: Myschool Past Questions Archive (Record #7220)
Biology
UTME / JAMB 2003
Growth, Micro-organisms & Public Health
An insect whose economic importance is both harmful and beneficial is the
A
Tsetsefly
B
Blackfly
C
Mosquito
D
Butterfly
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 #7221)
Biology
UTME / JAMB 2003
Cell Structure, Organization & Cell Division
The cell component that is present in a prokaryotic cell is the
A
Chloroplast
B
Ribosome
C
Mitochondrion
D
Nuclear envelope
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 #7222)
Biology
UTME / JAMB 2003
Basic Ecological Concepts, Ecosystems & Biomes
The stunted growth of a leguminous plant suffering from nitrogen deficiency may be corrected by inoculating the soil with
A
denitrifying bacteria
B
Saprophytic bacteria
C
Rhizobium
D
Nitrosomonas
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 #7223)