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Biology & Geology

Chapter 1 - Support and Movement in Living Organisms

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Chapter 2 - Hormonal Coordination in Living Organisms

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Chapter 3 - Reproduction in Living Organisms

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Chapter 4 - Immunity in Living Organisms

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Chapter 5 - Molecular Biology - DNA Structure and Function

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Chapter 6 - Molecular Biology - RNA, Protein Synthesis and Genetic Engineering

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Chapter 7 - Geology, Earth Sciences and Ecology

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Quiz

Lesson 2 Quiz: The Human Immune System (Organs, Cells, and Antibodies)

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  • Questions count: 12
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1.
A transition element whose +5 oxidation state compound (V2O5) is widely utilized as an industrial catalyst in the Contact Process for sulfuric acid manufacturing and as a colorant in ceramics is:
Vanadium (23V)
Manganese (25Mn)
Scandium (21Sc)
Cobalt (27Co)
2.
While the students ________ in the art workshop, the tour guide arrived.
were working
work
are working
worked
3.
We visited the pottery village in Fustat ________ our holiday in Cairo.
when
during
while
as
4.
The sum to infinity of the geometric series 16 + 8 + 4 + 2 + ... equals:
30
24
64
32
5.
The derivative of f(x) = 4 x3 - 5 x2 + 7 x - 9 with respect to x is:
f'(x) = 4 x2 - 5 x + 7
f'(x) = 12 x3 - 10 x2 + 7
f'(x) = 12 x2 - 10 x + 7
f'(x) = 12 x2 - 10 x
6.
The derivative of y = sin(3x) with respect to x is:
cos(3x)
3 sin(3x)
3 cos(3x)
-3 cos(3x)
7.
The equation of the tangent line to the curve y = x3 at the point (1, 1) is:
y = 3x - 2
y = -3x + 4
y = x
y = 3x + 1
8.
Why are hydroelectric storage dams constructed with a base that is significantly thicker than the crest?
To reduce the gravitational pull of the bedrock
To allow fish to swim upstream through drainage gates
Because hydrostatic water pressure increases linearly with depth (P = rho * g * h), exerting immense overturning forces at the bottom
To prevent solar radiation from penetrating the foundation
9.
Pure water reaches its maximum density (1.000 g/cm3 or 1000 kg/m3) at a temperature of:
0.0 °C
-4.0 °C
25.0 °C
4.0 °C
10.
Reproduction by peaceful association in two adjacent threads of the spirogyra moss (Rem al-Barak) occurs in the case of:
Mild spring
Complete darkness
Abundance of pure fresh water
The environment is exposed to drought, change in water purity, or change in temperature (unsuitable conditions)
11.
Double fertilization in flowering plants involves two fusions:
Fusion of petals with sepals
Chromosome duplication in Takht cells
The fusion of the zygote nucleus (N) with the egg nucleus (N) to form the zygote (2N), and the fusion of the second nuclei (N) with the two polar nuclei (2N) to form the sperm nucleus.Dosperm (3N)
The fusion of two pollen grains with one egg
12.
Polyribosome is a vital cellular structure consisting of:
Mitochondrial aggregation
Fusion of two nuclei
Accumulated peripheral granules
A large number of ribosomes (up to 100 ribosomes) attach to a single mRNA molecule to translate it simultaneously and quickly build many copies of the protein.
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