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Biology & Geology

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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Quiz

Lesson 1 Quiz: Asexual and Sexual Reproduction and Alternation of Generations

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1.
Concentrated nitric acid (HNO3) induces chemical passivity on the surface of iron metal due to:
The instantaneous dissolution of iron into gaseous ions
The formation of an extremely thin, non-porous protective oxide film that halts further reaction
Complete neutralization of the acid
The precipitation of elemental sulfur on the surface
2.
The atomic radii of the elements from Chromium to Copper remain remarkably steady and nearly constant across the first transition series because of:
The sudden increase in atomic mass
Decreasing ionization energies
The identical number of neutrons in their nuclei
The mutual compensation between the increasing nuclear charge and the repulsive forces among accumulated 3d electrons
3.
The sum of the first n terms of an arithmetic sequence (S_n) is formulated as:
S_n = a * (1 - rn) / (1 - r)
S_n = a / (1 - r)
S_n = n / 2 * [ 2a + (n - 1) * d ] = n / 2 * [ a + l ]
S_n = n * (a + d)
4.
The sum of the first 10 terms of the geometric sequence 2, 6, 18, 54, ... equals:
118,096
29,524
19,682
59,048
5.
An air bubble released from the bottom of a deep lake expands in volume as it rises towards the surface because:
The water temperature at the surface is near absolute zero
The hydrostatic pressure decreases as depth decreases, allowing the trapped air to expand according to Boyle's law
Atmospheric pressure increases at the surface
The bubble absorbs water molecules into its gas phase
6.
In the life cycle of the fougere plant (a fern), the haploid (N) gametophyte produces its male and female gametes by:
Direct meiosis
Surface budding
Regeneration
Mitosis within antheridia and archegonia
7.
Party 3' For a DNA strand that ends with a group:
Free hydroxyl (-OH)
Free amine (-NH2)
Free phosphate (-PO4)
Free carboxylate (-COOH)
8.
The standard start codon in an mRNA molecule recognized by the first tRNA molecule carrying methionine is:
UAA
UGA
UAG
AUG
9.
The anticodon on the tRNA molecule carrying methionine is:
CAU
GUA
UAC
AUG
10.
The first human protein produced commercially using recombinant DNA technology to treat diabetics is:
Human hormone insulin (Insulin)
Interferon protein
Growth hormone
Hemoglobin
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