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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: Adrenal Glands, The Pancreas and Reproductive Gonads

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  • Questions count: 11
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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:
Scandium (21Sc)
Vanadium (23V)
Cobalt (27Co)
Manganese (25Mn)
2.
When dry chlorine gas is passed over red-hot iron filings, iron(III) chloride (FeCl3) is exclusively formed rather than iron(II) chloride because:
Iron(II) chloride spontaneously sublimes into thin air
The reaction occurs strictly in an alkaline medium
Chlorine cannot react with the inner 3d electrons
Chlorine gas is a powerful oxidizing agent that readily oxidizes any formed Fe2+ to Fe3+
3.
Magnetic iron oxide (Magnetite, Fe3O4) is chemically considered a mixed oxide because reacting it with hot concentrated sulfuric acid yields:
Iron(II) sulfate and hydrogen gas only
Elemental iron and sulfur dioxide
Iron(III) sulfate only
A mixture of iron(II) sulfate, iron(III) sulfate, and water vapor
4.
Pascal's principle states that when pressure is applied to an enclosed, incompressible fluid, it is transmitted:
Undiminished to every portion of the fluid and to the walls of the containing vessel
With an exponential decay as distance increases
Strictly to compressible gases
Only downwards towards the bottom of the vessel
5.
A mercury manometer connected to a gas tank shows the mercury level in the free arm is 4 cm higher than the gas arm (Pa = 76 cm Hg). The gas pressure is:
76 cm Hg
4 cm Hg
80 cm Hg
72 cm Hg
6.
Solid ionic compounds such as crystal NaCl do NOT conduct electricity in the solid state because:
They contain no electrical charges
They decompose in the presence of air
Their ions are tightly locked in fixed positions within the rigid crystal lattice and cannot move freely
Electrons are moving too rapidly
7.
The direct cause of myxedema in an adult is:
Severe deficiency in thyroxine secretion in adulthood
Hyperactivity of the parathyroid gland
Insulin deficiency
Excessive increase in growth hormone
8.
The pituitary gland is considered the master of the endocrine glands (the maestro) because:
The largest gland by weight
It secretes stimulating hormones that control the secretions of most other endocrine glands in the body, such as the thyroid, adrenals, and gonads
Connected to the liver
Secretes digestive enzymes
9.
When examining a patient who suffers from severe weight loss, bulging eyes, rapid heart rate, and high temperature, the doctor diagnoses the condition as:
Diabetic urine
Exophthalmos caused by excessive secretion of the hormone thyroxine
Myxedema
Dwarfism
10.
Injection with serum (Antiserum) containing ready-made antibodies to neutralize scorpion venom gives the patient immunity:
Cellular induced
Innate
A rapid and temporary acquired negativity that is not accompanied by memory cells
Lasting positivity
11.
According to Chargaff's rules's Rules) In the DNA double helix, the equal ratio is always:
A = G And T = C
A / T = 2
A + T = G + C always
The ratio of adenine A equals thymine T, and the ratio of guanine G equals cytosine C (A+G). = T+C)
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