Past Questions and Answers Photosynthesis and Minerals Nutrition
SSCE/WASSCE/GCE PASS QUESTIONS AND ANSWERS
OBJECTIVE
1.
The mineral nutrient that
is most bound to the soil is
A. phosphorus C. iron
B. calcium D. potassium
2.
The mineral nutrient that easily
gets leached out of the soil is
A. phosphorus C. magnesium
B. calcium D. nitrate
3.
Most commercial fertilizers
are rich in salts of
A. sodium, iron and calcium
B. nitrogen, phosphorus and potassium
C. iron, copper and nitrogen
D. calcium, sodium and phosphorus
4.
If a healthy potted plant
is continuously kept in dim light
A. the rate of respiration may equal
that of photosynthesis
B. more carbon dioxide and water are
taken in
C. respiration may be halted
D. the volume of oxygen released increase
5.
The seedlings in rice field
were found to have thin lanky growth with reddish leaves and poor root development.
This is because the soil lacks
A. sulphur C. potassium
B. phosphorus D. iron
6.
The first step in the process
of photosynthesis is the
A. activation of the chlorophyll
B. photolysis of water
C. reduction of carbon dioxide
D. formation of sugar
7.
Etiolation is caused by the
influence of
A. minerals salt C. carbon dioxide
B. water D. light
8.
Free nitrogen is released
to the atmosphere by
A. Nitrogen-fixing bacteria
B. nitrifying bacteria
C. denitrifying bacteria
D. saprophytic bacteria
9.
Which of the following is
formed immediately after the first product of photosynthesis?
A. Lipid C. Oxygen
B. Starch D. Sugar
10. Interveinal chlorosis is normally associated with the deficiency of
A. magnesium C. iron
B. potassium D. calcium
11. 2H2 → 2H2 + O2(g). The
equation above represents a part of the light stage of photosynthesis. Which of
the following must be presents for this reaction to occur?
A. Enzyme and light energy
B. Carbon dioxide and light energy
C. Light energy and chlorophyll
D. Chlorophyll and enzyme
12. Trace elements are required by plants mainly for the
A. formation of pigments and enzymes
B. production of energy and hormones
C. manufactured of carbohydrates
D. manufacture of proteins
13. In a water culture experiment, a plant showed poor growth and yellowing of the leaves. These may be due to deficiency in
A. copper C. magnesium
B. iron D. calcium
14. The dark reaction of photosynthesis involves
A. fixation of carbon (IV) oxide to
give six-carbon sugar
B. fixation of carbon (IV) oxide with
the help of oxygen
C. use of carbon (IV) oxide to produce
glucose using ATP
D. fixation of carbon (IV) oxide on chlorophyll using hydrogen
15. Yellowing of leaves is a symptom associated with deficiency of
A. iron, calcium and magnesium
B. nitrogen, sulphur and potassium
C. sulphur, phosphorus and iron
D. magnesium, nitrogen and iron
16.
The substance labelled I
originates from
A. III only C. I and IV
B. IV only D. III and IV
17.
The gas occupying the space
labelled I is
A. carbon (IV) oxide C. hydrogen
B. nitrogen D. oxygen
18.
Which of the following
statement is correct about the experiment?
A. The flask must be of the conical
type
B. Caustic soda can be replaced with
distilled water
C. The enclosed leaf will lose its
green colour
D. The leaves outside the flask serve as control
19.
Which of the following
factors will be investigated if a potted plant with variegated leaves is used
in photosynthesis experiment?
A. light C. chlorophyll
B. carbon dioxide D. water
20.
The experimental set-up can
be used to demonstrate that
A. light is necessary for
photosynthesis
B. oxygen is necessary for photosynthesis
C. photosynthesis occurs in the leaves
of plants
D. carbon (IV) oxide is necessary for photosynthesis
Answers
|
1. C |
6. A |
11. C |
16. B |
|
2. D |
7. A |
12. A |
17. D |
|
3. B |
8. C |
13. B |
18. D |
|
4. A |
9. B |
14. A |
19. C |
|
5. B |
10. A |
15. D |
20. D |
THEORY
1. (SSCE
1995, Q2) (a) How does the structure of the
leaf adapt it to its photosynthesis function?
(b) How will you demonstrate experimentally that chlorophyll is necessary for photosynthesis?
Solution
Refer to blog content
2. (SSCE
1997) Describe the light stage of photosynthesis
(i) State the importance of photosynthesis to life in general.
Solution
3. (SSCE
2002 Q2) (a) Explain briefly how temperature
affect photosynthesis.
(ii) State the other factors which affect
photosynthesis
(a) Describe a test that can be used to show that photosynthesis has taken place in a leaf.
Solution
4. (SSCE, 2002 Q5) (c) state four natural process which replace the CO2 for photosynthesis.
Solution
ü Burning of vegetation by natural causes
ü Respiration by living organisms
ü Emission from volcanoes
ü Decay of organic matter
5. (SSCE 2003 Q4) (b) Explain how the structure of a leaf adapts it to its function as photosynthetic organ.
Solution
Refer to blog content
6. (WASSCE 2006 Q1) (c) write an equation to represent the first stage of photosynthesis.
Solution
7. (WASSCE
2009 Q2) (d) State the importance of the
following mineral elements in plants;
(i) Iron (ii) Calcium (iii) Nitrogen
8. (WASSCE
2009 Q6) (a) Explain how the structure of a
leaf adapts it to photosynthetic function.
(b) Describe what happens in the dark stage of
photosynthesis
(c) State three factors each that affects:
(i) the rate of photosynthesis
Solution
(a) Refer to blog content
(b) This stage is light independent. It occurs in the stroma of the
chloroplast.
Carbon dioxide converts 5-C compound into unstable 6-C compound. The resulting 6-C compound breaks down into two molecules of a 3-C compound. The 3-C sugar is used in the synthesis of simple sugar using NADPH2 and ATP produced in the light stage.
(c)(i) Refer to blog content
9. (SSCE 2011, Q2) With the aid of diagram 8-10cm long, describe how oxygen is given out as a by-product of photosynthesis.
Solution
Refer to blog content
10. (WASSCE
2012) 2(c) State one function of the
following elements in plant nutrition
(i) magnesium (iii) molybdenum
(ii) calcium (iv) copper
11. (WASSCE 2014) State three ways in which photosynthesis of is important to the environment
Solution
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