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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: Rock Cycle, Minerals, Crystallography and Weathering

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  • Questions count: 20
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1.
When dry chlorine gas is passed over red-hot iron filings, iron(III) chloride (FeCl3) is exclusively formed rather than iron(II) chloride because:
Chlorine gas is a powerful oxidizing agent that readily oxidizes any formed Fe2+ to Fe3+
Iron(II) chloride spontaneously sublimes into thin air
Chlorine cannot react with the inner 3d electrons
The reaction occurs strictly in an alkaline medium
2.
Solid ionic compounds such as crystal NaCl do NOT conduct electricity in the solid state because:
Electrons are moving too rapidly
They decompose in the presence of air
Their ions are tightly locked in fixed positions within the rigid crystal lattice and cannot move freely
They contain no electrical charges
3.
Which of the following solutions has the lowest pH value (strongest acidity) at equal concentration?
HCl
NaCl
NH4OH
CH3COOH
4.
Artificial parthenogenesis in flowering plants (such as the production of seedless oranges or watermelons) is carried out by:
Spraying flower stigmas with pollen extract or indole acetic acid to stimulate the ovary to form fruit without fertilization
Irradiating seeds with X-rays
Tissue culture
Pen vaccination
5.
Experiments using genes for resistance to insect pests in crop plants (such as the Bacillus thuringiensis gene) are an application to:
Artificial parthenogenesis
Propagation by hydroponics
Parthenogenetic fruiting
Genetic engineering and development of genetically modified plants resistant to pests without chemical pesticides
6.
Auxins in plants (such as indole acetic acid (IAA)) are chemicals secreted from:
Dead wood cells
Cork cells
Pollen granules only
The growing tops and live plant buds are active and move to the response areas
7.
The movement of tension in the tendrils of climbing plants such as peas and grapes depends physiologically on:
Secretion of gluey substances
Slow growth of the area in contact with the support and rapid growth of the area far from it as a result of the varying distribution of auxins
Degeneration of tendril cells
Water loss through rapid transpiration
8.
Which enzyme is responsible for linking Okazaki fragments into a continuous strand during lagging strand replication?
DNA Polymerase
Reverse Transcriptase
DNA Ligase
DNA Helicase
9.
Which of the following organisms has its genetic material as a single molecule of RNA rather than DNA?
Yeast
Bacteriophage T2
Escherichia coli bacteria
Human immunodeficiency virus (HIV), polio virus, influenza and coronavirus
10.
Which of the following oxides is classified as an amphoteric oxide that reacts with both acids and bases to yield salt and water?
Sodium oxide (Na2O)
Aluminum oxide (Al2O3)
Sulfur trioxide (SO3)
Carbon dioxide (CO2)
11.
The cells that secrete the hormones oxytocin and ADH and store them in the posterior lobe of the pituitary gland are:
Apocrine neurons in the hypothalamus (hypothalamus)
Pineal gland cells
Glial cells
Frontal lobe glandular cells
12.
A solution with a pH value of 3.0 is classified as:
Neutral
Strongly acidic
Strongly alkaline
Weakly basic
13.
The main chemical reducing agent inside the Midrex furnace and its industrial source are respectively:
Water gas (mixture of CO and H2) produced from natural gas (methane CH4)
Pure carbon monoxide (CO) produced from metallurgical coke
Hydrogen gas produced from the electrolysis of water
Carbon dioxide mixed with limestone
14.
Plant hypersensitivity is an effective immunological method that includes:
Secreting nectar to attract bees
The plant kills some of its infected tissues and cells locally to prevent the spread of the microbe to healthy tissues
Stomata open at night
Root loss
15.
When dilute hydrochloric acid is added to a solid salt, a gas is evolved with a pungent odor that turns acidified potassium dichromate paper green while a colloidal yellow precipitate of sulfur separates in the reaction vessel. The anion is:
Sulfide (S2−)
Sulfate (SO42−)
Sulfite (SO32−)
Thiosulfate (S2O32−)
16.
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
Iron(II) sulfate and hydrogen gas only
Iron(III) sulfate only
Elemental iron and sulfur dioxide
17.
When severe dehydration and decreased blood volume and body fluids occur, which of the following hormonal changes occur?
Thyroxine secretion stops
Calcitonin secretion increases
The secretion of ADH and aldosterone increases to restore water and salts
ADH decreases and insulin increases
18.
A metal cation that forms a gelatinous white precipitate with NaOH which completely redissolves in excess reagent to form a soluble clear solution is:
Fe2+
Ca2+
Fe3+
Al3+ (due to the formation of soluble sodium meta-aluminate NaAlO2)
19.
Immunoglobulin (antibody), which exists as a pentamer and contains 10 sites to bind to the antigen is:
IgA
IgE
IgM
IgG
20.
Okazaki Fragments formed on the die strip (5' to 3') During DNA replication they are joined by an enzyme:
DNA ligase
Helix enzyme
Polymerase enzyme
Tac polymerase enzyme
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