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Biology
UTME / JAMB 1979
Basic Ecological Concepts, Ecosystems & Biomes
Solution
Grasses → Grasshoppers → Lizards → Snakes → Hawks
Which of these is not true? Grass in the above food chain
A
trap all the sunlight
B
trap a small percent of the sun energy
C
are primary producers
D
are eaten by primary consumers
E
contains chlorophyll
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Grasses typically trap around 1% of the sunlight that falls on their leaves. This energy is then converted into food energy through photosynthesis. The actual percentage can vary based on factors like light intensity, temperature, and atmospheric conditions.
Source: Myschool Past Questions Archive (Record #417)
Biology
UTME / JAMB 1979
Excretion & Homeostasis
Solution
Insect show consideration powers of water conservation. This is due to the fact that
A
The chitinous cuticle is impregnated with tanned protein
B
Nitrogenous waste is eliminated as urea
C
Chitin is impermeable to water
D
The malpighian tubules are impermeable to water
E
The curticle is covered with wax
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Insects conserve water through waterproof waxy cuticles, closing respiratory openings (spiracles), efficient excretory systems (Malpighian tubules) to reabsorb water, small size, and even generating metabolic water from food, allowing them to thrive in dry environments by minimizing water loss and maximizing water retention.
Source: Myschool Past Questions Archive (Record #461)
Biology
UTME / JAMB 1979
Supporting Tissues & Skeletal System
Solution
Root hair have their origin from
A
Endodermis
B
Pericycle
C
Cortex
D
Epidermis
E
Xylem
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Asymmetric cell division in an epidermal cell gives rise to a large cell (atrichoblast) that develops into a hairless epidermal cell and a shorter 'specialized' cell that forms a root hair (trichoblast).
Source: Myschool Past Questions Archive (Record #462)
Biology
UTME / JAMB 1979
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
The element nitrogen is utilized in
A
Formation of ATP
B
Formation of glucose
C
Formation of amino acid
D
Photosynthesis
E
None of the above
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 #463)
Biology
UTME / JAMB 1979
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Magnesium is utilized in the formation of
A
ATP
B
Glucose
C
Amino acids
D
Chlorophyll
E
Fats
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 #464)
Biology
UTME / JAMB 1979
Variety of Organisms & Classification of Living Things
Diagram
In the figure above the cell which controls the opening and closing of stomatal pore is
Attached Figure / Diagram
A
1
B
2
C
3
D
4
E
5
medium Difficulty
Verified Correct Answer: Option E
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #15485)
Biology
UTME / JAMB 1979
Reproduction in Plants & Animals
Diagram
The figure above is a section of a drupe. The part numbered 2 is
Attached Figure / Diagram
A
epicarp
B
endocarp
C
mesocarp
D
seed
E
pericarp
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 #15487)
Biology
UTME / JAMB 1979
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
The arrangements below are steps in protein digestion. Which is the correct sequence?
A. polypetides B.protein C. amino-acids D.peptones
A
a-b-c-d
B
c-d-a-b
C
b-d-a-c
D
a-d-b-c
E
b-a-c-d
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: Official Exam / Past Question Archive
Biology
UTME / JAMB 1979
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
The arrangements below are steps in protein digestion. Which is the correct sequence?
A. polypetides B.protein C. amino-acids D.peptones
A
a-b-c-d
B
c-d-a-b
C
b-d-a-c
D
a-d-b-c
E
b-a-c-d
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 #40477)
Chemistry
UTME / JAMB 1978
Acids, Bases, pH & Salts
Solution
Zinc Oxide is a?
A
Basic Oxide
B
Acidic Oxide
C
Amphoteric Oxide
D
Neutral Oxide
E
Reactive Oxide
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
Zinc oxide is an amphoteric oxide.
- It will dissolve in both acids and alkalis
Source: Myschool Past Questions Archive (Record #3)
Chemistry
UTME / JAMB 1978
Chemical Energetics & Thermochemistry
Solution
When sodium chloride and metallic sodium are each dissolved in water
A
both processes are exothermic
B
both processes are endothermic
C
the dissolution of metallic sodium is endothermic
D
the dissolution of metallic sodium is exothermic
E
the dissolution of sodium chloride is explosive
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
When small quantities of sodium metal is added to water, there is an exothermic reaction, and they react to form sodium hydroxide and hydrogen.
Source: Myschool Past Questions Archive (Record #4)
Chemistry
UTME / JAMB 1978
Periodic Table & Periodicity
Solution
The periodic classification of elements is an arrangement of the elements in order of their
A
Atomic Weights
B
Isotopic Weights
C
Molecular Weights
D
Atomic Numbers
E
Atomic Masses
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
Henry Moseley arranged the elements in the periodic table by their atomic number and this gave rise to the statement of the modern periodic law
Source: Myschool Past Questions Archive (Record #5)
Chemistry
UTME / JAMB 1978
Stoichiometry, Mole Concept & Volumetric Analysis
Solution
In the reaction between sodium hydroxide and sulphuric acid solutions, what volume of 0.5M sodium hydroxide would exactly neutralise 10cm\(^3\) of 1.25M sulphuric acid?
A
5cm3
B
10cm3
C
20cm3
D
25cm3
E
50cm3
medium Difficulty
Verified Correct Answer: Option E
Chemical Principles & Mechanism
\(2NaOH + H_{2}SO_{4} = Na_{2}SO_{4} + 2H_{2}O\)
V x 0.5M = 2(10 x 1.25)
0.5V = 2 x 12.5
0.5V = 25
V = \(\frac{25}{0.5}\) = \(50cm^{3}\)
Alternatively, \(\frac{{C_A}{V_A}}{{C_B}{V_B}}\) = \(\frac{N_A}{N_B}\)
Source: Myschool Past Questions Archive (Record #7)
Chemistry
UTME / JAMB 1978
Nature of Matter & Separation Techniques
Solution
A small quantity of solid ammonium chloride (NH4Cl) was heated gently in a test tube, the solid gradually disappears to produce two gases. Later, a white cloudy deposit was observed on the cooler part of the test tube. The ammonium chloride is said to have undergone?
A
distillation
B
sublimation
C
precipitation
D
evaporation
E
decomposition
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
Sublimation is the transition of a substance directly from the solid phase to the gas phase without passing through the intermediate liquid phase
Source: Myschool Past Questions Archive (Record #31)
Chemistry
UTME / JAMB 1978
Chemical Bonding & Intermolecular Forces
Solution
Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,
A
P will form an electrovalent bond with R
B
Q will form a covalent bond with S
C
R will form an electrovalent bond with S
D
Q will form an electrovalent bond with S
E
Q will form a covalent bond with R
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
Element P with 6 electrons has an atomic number of 6 = 2, 4 → C
Element Q with 11 electrons has an atomic number of 11 = 2, 8, 1 → Na
Element R with 15 electrons has an atomic number of 15 = 2, 8, 5 → P
Element S with 17 electrons has an atomic number of 17 = 2, 8, 7 → Cl
Given the above is the electronic arrangement of P,Q,R,S elements, Q will form an electrovalent bond with S because element Q(metal) has a valence of electron of 1 it can donate to another element needing 1 electron, which is element S (a non-metal). Thus, electrovalent bond is formed in compounds where there is a transfer of electron from metals to non-metals.
Source: Myschool Past Questions Archive (Record #32)