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

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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 precipitation of elemental sulfur on the surface
Complete neutralization of the acid
The formation of an extremely thin, non-porous protective oxide film that halts further reaction
2.
Magnetic iron oxide (Magnetite, Fe3O4) is chemically considered a mixed oxide because reacting it with hot concentrated sulfuric acid yields:
A mixture of iron(II) sulfate, iron(III) sulfate, and water vapor
Elemental iron and sulfur dioxide
Iron(III) sulfate only
Iron(II) sulfate and hydrogen gas only
3.
I have already booked the flight tickets. I ________ to London next Friday.
will travel
am traveling
travel
traveled
4.
The volume expansion coefficient at constant pressure (alpha_v) and the pressure expansion coefficient at constant volume (beta_p) for all ideal gases have the universal constant value of:
273.15 K
1.013 x 105 Pa
1 / 273.15 K−1 (approx. 0.00366 K−1)
8.314 J/(mol.K)
5.
The Ideal Gas Law combining all empirical gas relationships is mathematically formulated as:
P * T = n * R * V
P * V = n * R * T
P * V = m * g * h
P / V = n * R * T
6.
A metallic bond is physically described as the electrostatic attraction between:
Positive ions and negative non-metal anions
Dipole molecules in a polar liquid
Positive metal cations in the crystal lattice and the mobile sea of delocalized valence electrons
Protons and neutrons in the nucleus
7.
Acids are chemical compounds that dissociate in aqueous solutions to produce:
Hydrogen ions (H+ or hydronium ions H3O+), turning blue litmus paper red
Sodium ions and chlorine gas
Hydroxide ions (OH-) turning red litmus paper blue
Precipitated metallic salts
8.
The chemical formula of aluminum sulfate is correctly written as:
Al2(SO4)3
Al3(SO4)2
Al(SO4)3
AlSO4
9.
Auxins in plants (such as indole acetic acid (IAA)) are chemicals secreted from:
Pollen granules only
Dead wood cells
The growing tops and live plant buds are active and move to the response areas
Cork cells
10.
Immune chemicals secreted by virus-infected cells to warn neighboring healthy cells to produce enzymes that inhibit virus replication.S is:
Interferons
Complements
Interleukins
Chemokines
11.
Substances secreted by T helper cells (Th) and acting as a communication tool to activate neighboring B and T cells are:
Interleukins
Hemoglobin
Myoglobin
Antibodies
12.
A chemical substance used in the laboratory to cause mutations and chromosome duplication in the growing tips of plants is:
Sucrose solution
Glycerin
Colchicine, mustard gas, or nitrous acid
Hyaluronic acid
13.
DNA hybridization depends on the ability of single strands from different sources to combine if:
Made in the same cell
Treatment with shortening enzyme
They contain complementary sequences of nitrogenous bases and are linked by hydrogen bonds
They are just the same height and weight
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