Possible WASSCE Objective Test on Plants Nutrition -Biology 2024
POSSIBLE EXAMINATION OBJECTIVE TEST ON NUTRITION IN PLANT.
1. The importance of photosynthesis to life includes
A. Serving as a direct source of food for secondary
consumers
B. Replenishing oxygen in the atmosphere
C. Maintaining water balance in the soil
D. Producing vital inorganic compounds
Answer B. Replenishing oxygen in the atmosphere
2. The main site of photosynthesis in green leaves is the
A. stomata B. spongy mesophyll
C. guard cells D. palisade mesophyll
Answer D. palisade mesophyll
3. Which of the following adaptation of the leaf enhances
photosynthesis?
A. Presence of shiny cuticle
B. Possession of thin cuticle
C. Possession of narrow leaves
D. Presence of epidermal hair
Answer B. Possession of thin cuticle
4. Which of the following is not a necessary condition for
photosynthesis?
A. Suitable pH B. Presence of water
C. Supply of carbon dioxide D. Presence of light
Answer A. Suitable pH
5. Which of the following does not occur during
photosynthesis?
A. Energy from sunlight is absorbed
B. Carbon dioxide is evolved
C. Glucose is synthesized
D. Water is split
Answer B. Carbon dioxide is evolved
6. Which of the following equations is the correct chemical
equation for photosynthesis?
A. 6H2O + 6CO2 light, enzyme, C6H12O6 + 6O2 chlorophyll
B. 6H20 + CO2 chlorophyll 6CH2O + H2O light
C. 6H2O + CO2 light, enzymes CH2O + O2 chlorophyll
D. 6H2O + 6CO2 light, enzymes C6H12O6 + O2 chlorophyll
A. 6H2O + 6CO2 light, enzyme, C6H12O6 + 6O2 chlorophyll
7. The process by which oxygen passes out of a green leaf
is known as
A. Transpiration B. Translocation
C. Diffusion D. Excretion
Answer C. Diffusion
8. The stomata of leaves close when
A. there is light B. carbon dioxide level is low
C. wind speed is high D. guard cells are turgid
Answer C. wind speed is high
9. Carbon dioxide enters the stomata during
photosynthesis through the process of
A. Active transport B. Diffusion
C. Transpiration D. Osmosis
Answer B. Diffusion
10. Which of the following processes is/are associated with
photosynthesis ?
I. Energy from sunlight is absorb
II. Carbon dioxide is evolved
III. Oxygen is given off
IV. Glucose is synthesized
A. I and II only. B. I, II and IV only.
C. I, III, and IV only. D.I, II, III and IV.
Answer C. I, III, and IV only
11. In green plants solar energy is
absorbed by the
A. Mitochondrion B. Ribosome
C. Granum D. Cytoplasm
Answer C. Granum
12. The oxygen given off during photosynthesis is
obtained
A. By the ionization of water
B. By the breakdown of carbon dioxide
C. By the combination of carbon dioxide and water
D. From excess oxygen taken into the plant
Answer A. By the ionization of water
13. The oxygen given out during photosynthesis comes
from the
A. breakdown carbon dioxide
B. photolysis of water
C. surplus oxygen taken into the plant
D. combination of water and CO2
Answer B. photolysis of water
14. What biological process describe the following
equation?
2H2O 𝑙𝑖𝑔ℎℎ𝑡 → 4H+ + O2 + 4e-
A. Photolysis of water
B. Dehydrogenation of water
C. Oxygen synthesis from water
D. Electron production from water
Answer A. Photolysis of water
15. Which of the following types of energy is utilized during
photosynthesis?
A. Potential energy B. Kinetic energy
C. Chemical energy D. Solar energy
Answer D. Solar energy
16. The source of energy required by plants during
food production is
A. Microorganisms B. Chlorophyll
C. Photosynthesis D. Sunlight
Answer D. Sunlight
17. One major difference between plant and animal
nutrition is that ability of plants to synthesize
A. Water for animals
B. Water for plants
C. Food for plants and animals
D. Food for plants only
Answer C. Food for plants and animals
18. In vascular plants, translocation of simple sugar in
solution is always carried out by the
A. epidermis B. pericycle
C. xylem tissue D. phloem tissue
Answer D. phloem tissue
19. Green plants perform all the following functions except
A. Providing food for all the primary consuming
B. Breaking down complex organic matter into simpler
substances
C. Producing oxygen to replenish the atmosphere
D. Using carbon dioxide and water to build complex
organic.
Answer B. Breaking down complex organic matter into simpler
substances
20. In testing for starch in a leaf, the leaf is boiled in
alcohol to
A. Kill the cells
B. Soften the
C. Remove the chlorophyll
D. Expose the starch
Answer C. Remove the chlorophyll
21. Which of the following condition is the limiting factors
to the amount of photosynthesis in a leaf?
A. Carbon dioxide concentration in the atmosphere.
B. Oxygen concentration in the atmosphere
C. Total surface area of the root system
D. The amount of Na+ in the soil
Answer A. Carbon dioxide concentration in the atmosphere.
22. The process that takes place at the light stage of
photosynthesis is
A. Reduction of carbon dioxide to from carbohydrate.
B. Splitting of ATP molecules to produce energy
C. Splitting of water molecules to produce hydrogen ions
D. Formation of two molecules of phosphoglyceric acids
Answer C. Splitting of water molecules to produce hydrogen ions
23. The tissue which manufacture carbohydrates in the
leaves is the
A. Epidermis B. Hypodermis
C. Mesophyll D. Phloem
Answer C. Mesophyll
24. The conversion of glucose to starch in the leaf during
the day principally
A. Enables the day photosynthesis to go on.
B. Enables osmotic problems.
C. Enables the leaf to store the photosynthate.
D. Prevents the glucose from being used up.
Answer C. Enables the leaf to store the photosynthate.
25. Which of the following processes occurs during the
dark stage of photosynthesis?
A. Splitting of water molecules
B. Activation of chlorophyll
C. Reduction of carbon dioxide
D. Formation of NADPH2
Answer C. Reduction of carbon dioxide
26. Which of these statements about photosynthesis is
true?
A. Carbohydrate is produced in the light stage
B. Water molecules are split to yield ATP
C. A molecule of chlorophyll is initially broken down
D. The unstable 6-carbon compound breaks up into 3- carbon compound
Answer D. The unstable 6-carbon compound breaks up into 3- carbon compound
27. In photosynthesis, the following processes are part
of the light reaction except:
A. transfer of radiant energy which reduces a co-factor.
B. absorption of radiant energy by chloroplast.
C. utilization of the energy in the electron transfer chain to form ATP.
D. formation of glucose using energy from NADPH
Answer D. formation of glucose using energy from NADPH
28. The light stage of photosynthesis involves
A. Fixation of carbon dioxide
B. The reduction of ribulose diphosphate
C. Photolysis of water
D. Oxidation of NADPH to NADP
Answer C. Photolysis of water
29. Photolysis in photosynthesis is the splitting of
A. Glucose molecules in the light stage
B. Water molecules in the light stage
C. Glucose molecules in the dark stage
D. Water molecules in the dark stage
Answer B. Water molecules in the light stage
30. Which of the following process does not occur in the
Calvin cycle?
A. Deamination of protein
B. Production of glyceraldehyde- 3- phosphate
C. Formation of pyruvic acid
D. Utilization of carbon dioxide
Answer A. Deamination of protein
31. The source of energy used in binding Pi to ADP is
A. H+
B. B-
C. The sun
D. Cytochrome
Answer C. The sun
32. The hydrogen acceptor in photosynthesis is
A. NAD B. FAD C. NADP D. ADP
Answer C. NADP
33. The energy needed during the dark reaction of
photosynthesis is provided by
A. ADP B. ATP
C. NADP D. NADPH
Answer B. ATP
34. Which of these compounds in light stage of
photosynthesis is needed in the dark stage?
A. Hydroxyl ions B. NADPH2
C. Oxygen D. ADP
Answer B. NADPH2
35. Which of the following substances is formed during the
Calvin cycles?
A. Adenine triphosphate
B. Dexyribose-3-sugar
C. Gaseous oxygen
D. Phosphoglyceraldehyde
Answer D. Phosphoglyceraldehyde
36. In which of the wave bands of light is the rate of
photosynthesis greatest?
A. Red and green
B. Red and blue
C. Green and blue
D. Green and violet
Answer B. Red and blue
37. During photosynthesis NADP plays the role of
A. Hydrogen and carbon dioxide acceptor
B. Hydrogen acceptor and hydrogen donor
C. Hydrogen and carbon dioxide donor
D. Hydrogen donor and carbon dioxide acceptor
Answer B. Hydrogen acceptor and hydrogen donor
38. Photochemical reaction in photosynthesis is not
affected by the
A. Available of water B. Available of NADP
C. Wavelength of light D. Temperature
Answer D. Temperature
39. The light stage of photosynthesis involves
A. Fixation of carbon dioxide
B. The reduction of ribulose diphosphate
C. Photolysis of water
D. Oxidation of NADPH to NADP
Answer C. Photolysis of water
40. Which of the following factors will be investigated if a
potted plant with variegated leaves is used in
photosynthesis experiment?
A. Carbon dioxide B. Light
C. Chlorophyll D. Water
Answer C. Chlorophyll
41. When is a variegated leaf as both the control and
experimental set-up?
A. Light for photosynthesis
B. Chlorophyll for photosynthesis
C. Carbon dioxide for photosynthesis
D. Water for photosynthesis
Answer B. Chlorophyll for photosynthesis
42. During an experiment a variegated leaf was exposed to
sunlight for a few hours and later tested for starch. Which
of the following conditions of photosynthesis is likely to be
tested for?
A. Water B. Sunlight
C. Carbon dioxide D. Chlorophyll
Answer A. Water
43. In an experiment aimed at testing for starch in a green
leaf, the leaf is boiled in alcohol in order to
A. Sterilize the leaf
B. Kill the leaf
C. Isolate the starch grains
D. Dissolve the chlorophyll out of the leaf
Answer D. Dissolve the chlorophyll out of the leaf
44. Boiling a leaf when testing for starch is necessary to
A. Decolorize the leaf
B. Soften the leaf
C. kill the cells and inactivate the enzymes
D. Provide the right temperature
Answer C. kill the cells and inactivate the enzymes
45. Chemical usually carried out on leaves to determine
the product of photosynthesis is the
A. Benedict’s test
B. Biuret test
C. Iodine test
D. Anhydrous copper sulphate test
Answer C. Iodine test
46. In testing for reducing sugar, the food substance is
usually warmed with
A. sodium hydroxide B. Millon’s reagent
C. Sudan III D. Benedict’s solution
Answer D. Benedict’s solution
47. In testing for glucose, the necessary reagent and the
condition under which the reagent reacts best are
A. Fehling’s reagent, in the cold
B. Millon’s reagent, boiled
C. Fehling’s reagent in acid medium, heated
D. Fehling’s reagent in neutral or alkaline medium,
boiled
Answer D. Fehling’s reagent in neutral or alkaline medium,
boiled
The steps below are involved in the testing of a leaf
for starch. Study them carefully and answer questions
48 and 49.
I. Decolourize leaf
II. Dip decolorized leaf in warm water
III. Place leaf in boiling water
IV. Add iodine solution
48. The correct order of the test is
A. I, II, III and IV B. II, III, I and IV.
C. III, I, II and IV. D. I, III, II and IV
Answer C. III, I, II and IV.
49. The best time to pluck the leaf for the experiment is
A. After being exposed to sunlight
B. Three hours after sunset
C. Before sunrise
D. Six hours after sunset
Answer A. After being exposed to sunlight
50. The evidence that photosynthesis has taken place in a
place in a plant is the presence of
A. Fats B. Protein
C. Vitamins D. Starch
Answer D. Starch
51. Which of these is direct photosynthetic product ?
A. Glucose B. Starch
C. Protein D. Latex
Answer A. Glucose
52. Which of the following tissues would contain the
greatest amount of starch after photosynthesis?
A. Palisade tissues B. Spongy tissue
C. Vascular tissue D. Cortex
Answer A. Palisade tissues
53. The most efficient method of suppressing algal growth
in culture solution is to
A. Prevent air from entering the solution
B. exclude light from entering the solution
C. add excess Sulphur compounds to the culture
D. raise the temperature of the culture solution
Answer B. exclude light from entering the solution
54. Light is excluded a water culture experiment in
order to
A. Prevent the growth of algae
B. Prevent ionization of water molecules
C. Enable them to grow straight down
D. Prevent overheating of the roots
Answer A. Prevent the growth of algae
55. In a water culture experiment, a plant showed poor
growth and yellowing of the leaves. These symptoms were
probably due to the absence of
A. calcium B. iron
C. phosphorus D. copper
Answer B. iron
56. The element nitrogen is utilised in
A. formation of ATP
B. formation of glucose
C. formation of amino acid
D. photosynthesis
Answer D. photosynthesis
57. A plant with pink leaves and stem is capable of
photosynthesizing because it
A. Has special cell which photosynthesizes.
B. Has chlorophyll which has been masked
C. Uses the pink pigment for photosynthesis
D. Processes carotene which is efficient photosynthesizing.
Answer B. Has chlorophyll which has been masked
58. A plant with poorly developed roots, yellowing buds and
yellowing new leaves is likely to be deficient in
A. Boron B. Copper
C. Manganese D. Sulphur
Answer D. Sulphur
59. Plants which appears very small in size with
underdeveloped yellowish leaves might be lacking.
A. Calcium B. Nitrogen
C. Potassium D. Phosphorus
Answer B. Nitrogen
60. Excessive sugar is stored in plants as
A. Glycogen B. Galactose
C. Starch D. Maltose
Answer C. Starch
61. The mineral salt important for cell wall formation is
A. Calcium B. Nitrogen
C. Phosphorus D. Iron
Answer A. Calcium
62. Which of the following is not regarded as a micro-element or trace element essential for plant growth?
A. Phosphorus B. Zinc
B. Boron D. Silicon
Answer B. Boron
63. Which of the following elements could be a limiting
factor to the production of energy in a cell ?
A. Calcium B. Phosphorus
C. Carbon D. Potassium
Answer B. Phosphorus
64. In a culture solution experiment deficiency of
magnesium will result in
A. Purple leaf colouration B. Stunted growth
C. Weak stem D. Yellowing of leaves
Answer D. Yellowing of leaves
65. Which of the following factors affect the rate of
photosynthesis?
I – Light intensity
II. – Moisture content of the atmosphere
III – Atmospheric pressure
IV – Temperature
A. I and II only B. I and IV only
C. II and III only D. II and IV only
Answer B. I and IV only
66. Micro elements are absorbed in very small quantities
by plants because
A. They are not really needed
B. They perform only functional amount needed.
C. Plants can produce the addition amount needed.
D. Only some few cells use them
Answer A. They are not really needed
67. Which of the following elements plays a part in
chlorophyll synthesis?
A. Boron B. Calcium
C. Magnesium D. Phosphorus
Answer C. Magnesium
68. Plant showing extremely stunted growth with very
small leaves are likely to be deficient in
A. Calcium B. Nitrogen
C. Phosphorus D. Potassium
Answer B. Nitrogen
69. In plants, the element that is required for nuclear
division is
A. Calcium B. Nitrogen
C. Phosphorus D. Sulphur
Answer A. Calcium
70. Which of the following elements is a macro element
required by plants?
A. Boron B. Iron.
C. Manganese D. Zinc
Answer C. Manganese
71. One of the micro element required by plants is
A. Calcium B. Iron
C. Manganese D. Magnesium
Answer C. Manganese
72. Plants with severe chlorosis lack
A. Calcium and magnesium
B. Nitrogen and iron
C. Phosphorus and iron
D. Sulphur and potassium
Answer B. Nitrogen and iron
73. Chlorosis in plants can be reduced by applying
A. Calcium and magnesium
B. Potassium and phosphorus
C. Sulphur and boron
D. Nitrogen and iron
Answer D. Nitrogen and iron
74. Chlorosis in a leaf could be caused by deficiency of
A. Mg B. P C. B D. CI
Answer A. Mg
75. All the following substances are micro-elements of
plants except
A. Cu B. Mg C. B D. Mn
Answer B. Mg
76. lacking nitrogen had stunted stem and yellow leaves.
Which of these statements about the state of the seedling
is true?
A. Nitrogen is essential for stem and root formation
B. Photosynthesis cannot take place in the absence of
nitrogen
C. Nitrogen is essential for protein synthesis
D. Nitrogen is needed for cell wall formation.
Answer C. Nitrogen is essential for protein synthesis
77. A plant cultivated in nitrogen deficient soil is likely to
A. be small with poorly developed roots and small
purple leaves
B. has its leaves developed yellow and brownish
margins
C. show yellowing of buds and new leaves with poor
root growth
D. be small, underdeveloped with yellow leaves
Answer D. be small, underdeveloped with yellow leaves
78. The following elements are required in large quantities
by plants except
A. Nitrogen B. Magnesium
C. Manganese D. Sulphur
Answer D. Sulphur
79. Which of the following pairs of macro-elements are
needed for synthesis of chlorophyll
A. Potassium and iron
B. Calcium and boron
C. Magnesium and nitrogen
D. Zinc and copper
Answer C. Magnesium and nitrogen
80. Which of the following functions is associated with
calcium in plants? Formation of
A. Cell wall B. Ribosomes
C. Proteins D. Cell membrane
Answer A. Cell wall
81. Deficiency of manganese is plants could lead to
A. Death of shoots
B. Scorching of leaves
C. Poor root development
D. Stunted growth
Answer D. Stunted growth
82. Which of the following element are macronutrients?
A. Copper, nickel, chlorine and boron
B. Calcium, phosphorus, magnesium and sulphur
C. Calcium, phosphorus, magnesium and sulphur
D. Zinc, copper, molybdenum and chlorine
Answer D. Zinc, copper, molybdenum and chlorine
83. The deficiency symptom of Magnesium manifest as
A. reddish leaves
B. mottled and brittle leaves
C. chlorosis with yellow leaves
D. poor root growth
Answer C. chlorosis with yellow leaves
BECE INTEGRATED SCIENCE 2022 QUESTIONS AND ANSWERS B (Pasco)
Organic and Inorganic Compounds SHS Int. Science lesson1 ; WASSCE Standard
