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Course: Alhussan Biology — Stage 9
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Alhussan Biology — Stage 9

Chapter 9: Plants and Photosynthesis

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Chapter 10: Excretion in Humans

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Chapter 11: Human Genetics and Development

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Chapter 12: The Carbon Cycle and Climate Change

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Chapter 13: Variation and Natural Selection

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Quiz

9.5 The need for minerals — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Which statement is NOT correct?
Decomposers produce nitrates.
Active transport needs no energy.
Without minerals a plant looks sickly and eventually dies.
Plants cannot use nitrogen gas from the air.
2.
Seedlings without nitrate reached 10 mg; with all minerals 20 mg. What percentage of full mass?
500%
50%
200%
10%
3.
Which statement is correct?
Some substances cannot be made from carbohydrates alone.
Nitrates are not needed for DNA.
Mineral deficiency makes plants grow taller.
Active transport needs no energy.
4.
Dry mass of seedlings grown in different solutions. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 1
A
B
C
D
5.
Chlorophyll in leaves with different magnesium. What is the value of "Chlorophyll (units)" when "Magnesium (mg/L)" is 30?
Dr Dabour Hub Academy - figure 2
2
18
20
10
6.
Which ion is at the centre of every chlorophyll molecule?
Magnesium
Sodium
Nitrate
Iron
7.
Nitrate in soil after harvests. By how much does "Soil nitrate (units)" change between 0 and 4?
Dr Dabour Hub Academy - figure 3
99
47
59
26
8.
Nitrate in soil after harvests. At what value of "Harvest" is "Soil nitrate (units)" greatest?
Dr Dabour Hub Academy - figure 4
3
0
4
1
9.
Which statement is correct?
Minerals are made in leaves by photosynthesis.
Minerals are carried around the plant with water.
Nitrate is absorbed by diffusion only.
Active transport needs no energy.
10.
Chlorophyll rose from 2 to 16 units with magnesium. How many times more?
18.0 times
8.0 times
0.1 times
14.0 times
11.
Seedlings without nitrate grew to 8 mg; those with all minerals grew to 24 mg. What percentage of the full mass did the nitrate-deficient seedlings reach?
33%
300%
16%
67%
12.
Nitrate in soil after harvests. Which statement best describes the pattern?
Dr Dabour Hub Academy - figure 5
"Soil nitrate (units)" rises to a peak at 0, then falls
"Soil nitrate (units)" stays the same
"Soil nitrate (units)" increases as "Harvest" increases
"Soil nitrate (units)" decreases as "Harvest" increases
13.
Which is the correct definition of “Amino acid”?
The engineer who scaled up ammonia making.
Building block of proteins.
Waterproof layer on a leaf.
Water moving into cells through a membrane.
14.
Which term matches this definition? “Yellowing of leaves from lack of chlorophyll.”
Sink
Active transport
Potassium
Chlorosis
15.
Crop yield with increasing nitrate. What is the value of "Yield (t/ha)" when "Nitrate added (kg/ha)" is 100?
Dr Dabour Hub Academy - figure 6
6.7
5.8
6.9
4.5
16.
Nitrate in soil after harvests. At what value of "Harvest" is "Soil nitrate (units)" smallest?
Dr Dabour Hub Academy - figure 7
2
4
3
0
17.
Soil nitrate fell from 90 to 30 units. Calculate the percentage decrease.
200%
60%
67%
33%
18.
Which term matches this definition? “Lack of a mineral causing poor growth.”
Decomposer
Potometer
Mineral deficiency
De-starched plant
19.
Soil nitrate fell from 100 to 30 units. Calculate the percentage decrease.
233%
30%
700%
70%
20.
Soil nitrate fell from 100 to 45 units. Calculate the percentage decrease.
55%
550%
122%
45%
21.
What do plants use nitrates for?
To absorb light
To make chlorophyll only
To make amino acids and proteins
To make starch
22.
Chlorophyll in leaves with different magnesium. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 8
A
B
C
D
23.
Dry mass of seedlings grown in different solutions. What is the value for No nitrate?
Dr Dabour Hub Academy - figure 9
28
14
9
4
24.
Nitrate in soil after harvests. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 10
A
B
C
D
25.
Which statement is NOT correct?
Less chlorophyll means less light is absorbed.
Harvesting crops uses up soil minerals.
Harvesting adds minerals to soil.
Without nitrate, older leaves turn yellow.
26.
Chlorophyll rose from 4 to 18 units with magnesium. How many times more?
14.0 times
22.0 times
0.2 times
4.5 times
27.
Dry mass of seedlings grown in different solutions. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 11
A
B
C
D
28.
Dry mass of seedlings grown in different solutions. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 12
A
B
C
D
29.
Seedlings without nitrate reached 8 mg; with all minerals 20 mg. What percentage of full mass?
12%
60%
250%
40%
30.
Which statement is NOT correct?
Less chlorophyll means less light is absorbed.
Lack of magnesium gives dark green leaves.
Minerals are replaced by fertilisers or decomposers.
Magnesium ions are at the centre of every chlorophyll molecule.
31.
Seedlings without nitrate reached 8 mg; with all minerals 24 mg. What percentage of full mass?
33%
300%
16%
67%
32.
Nitrate in soil after harvests. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 13
A
B
C
D
33.
Which statement is NOT correct?
Without magnesium, less chlorophyll is made.
Less chlorophyll means less light is absorbed.
Root hairs absorb minerals against a concentration gradient.
Nitrates are not needed for DNA.
34.
Less chlorophyll means less light is ____.
made
wasted
reflected
absorbed
35.
Nitrate is taken up by ____.
photosynthesis
osmosis
active transport
diffusion only
36.
Without nitrate, older leaves turn ____.
blue
red
yellow
black
37.
Magnesium ions are at the centre of every ____ molecule.
protein
starch
chlorophyll
DNA
38.
Nitrogen is moved from old leaves to growing ____.
flowers only
seeds only
roots only
tips
39.
Harvesting crops uses up soil ____.
light
minerals
air
heat
40.
The symbol of the magnesium ion is ____.
Mn²⁺
MgO
Mg²⁺
Mg⁺
41.
True or false? Plants absorb mineral ions dissolved in soil water.
True
False
42.
True or false? Less chlorophyll means less light is absorbed.
True
False
43.
True or false? Plants cannot use nitrogen gas from the air.
True
False
44.
True or false? Nitrates are not needed for DNA.
True
False
45.
True or false? Mineral deficiency makes plants grow taller.
True
False
46.
True or false? Nitrates supply nitrogen to make amino acids and proteins.
True
False
47.
True or false? Minerals are replaced by fertilisers or decomposers.
True
False
48.
True or false? Magnesium is needed for proteins.
True
False
49.
True or false? Harvesting adds minerals to soil.
True
False
50.
True or false? Decomposers produce nitrates by breaking down dead bodies and waste.
True
False
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Part of Chapter 9: Plants and Photosynthesis — see every lesson and quiz in this unit.
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