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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.
Why is the genetic code described as 'degenerate' or 'redundant'?
Multiple different codons can code for the same single amino acid.
One codon can code for multiple different amino acids.
The genetic code differs completely between bacteria and humans.
The genetic code decays as the cell ages.
2.
The electronic configurations of both Chromium (24Cr) and Copper (29Cu) are anomalous due to the enhanced stability associated with:
Completely empty 4s subshells
High electronegativity differences
Half-filled (3d5) and completely filled (3d10) d-subshells respectively
Pairing of all electrons in the outer valence level
3.
The Cairo Monorail travels on an elevated single-beam track to avoid urban traffic ________.
stations
gardens
comfort
congestion
4.
The sum to infinity of the geometric series 12 + 6 + 3 + 1.5 + ... equals:
24
36
18
Infinity
5.
The slope of the tangent line to the curve y = x2 - 6 x + 5 at the point (4, -3) equals:
m = 2
m = 8
m = -2
m = -3
6.
Using the Quotient Rule, the derivative of y = (x + 3) / (x - 2) for x != 2 is:
1 / (x - 2)2
(2x + 1) / (x - 2)2
5 / (x - 2)2
-5 / (x - 2)2
7.
If f(x) = |x - 3|, the derivative f'(3) at x = 3:
Equals 0
Equals -1
Does not exist because the left-hand derivative (-1) does not equal the right-hand derivative (+1)
Equals 1
8.
A diver descends to a depth of 30 meters in seawater (density = 1030 kg/m3). If atmospheric pressure is 1.013 x 105 Pa and g = 9.8 m/s2, the total absolute pressure experienced by the diver is approximately:
3.03 x 105 Pa
4.04 x 105 Pa (approx. 4.0 atmospheres)
6.06 x 105 Pa
1.01 x 105 Pa
9.
Real gases behave most closely to an ideal gas under conditions of:
Extremely high pressure and low temperature
Very low pressure and high temperature (where intermolecular attraction forces and molecular volumes become negligible)
Zero gravitational acceleration
High pressure and near liquefaction point
10.
The movement of hydrotropism in plant roots is considered tropism:
Negatively
randomly
Positive (the root bends in the direction of moisture and water concentration)
Unaffected
11.
Hydra and planaria share the ability to reproduce asexually by:
Regeneration
Longitudinal binary fission
Bacteria formation
Budding only
12.
In gene cloning technology, a ligase is used to:
Cut the plasmid
Linking the integrated sticky ends of a target gene to the sticky ends of a circular plasmid
mRNA transcription
Breaking down proteins
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