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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 1 Quiz: Structure of Earth, Geological Time and Structural Geology

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  • Questions count: 20
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1.
A U-tube contains water (ρ = 1000 kg/m3) and oil (ρ = 800 kg/m3). If the oil column height above the interface is 10 cm, the balancing water column height is:
8 cm
6.4 cm
12.5 cm
10 cm
2.
Phenolphthalein indicator cannot distinguish between an acidic solution and a neutral solution because:
It is red in both
It is colorless in both
It is blue in both
It precipitates in both
3.
The fetal membrane that directly surrounds the fetus and secretes a fluid that protects it from shock and dehydration and facilitates its movement is:
Amniotic membrane (Chorion)
Vitelline membrane
Plasma membrane
Amnion
4.
The genetic code is characterized as universal because:
It does not change with mutations
The same codons code for the same amino acids in all organisms from bacteria to humans, confirming the common origin of life
It consists of only two letters
It is found in the nucleus only
5.
When severe dehydration and decreased blood volume and body fluids occur, which of the following hormonal changes occur?
ADH decreases and insulin increases
Thyroxine secretion stops
Calcitonin secretion increases
The secretion of ADH and aldosterone increases to restore water and salts
6.
Cells that carry CD8 receptors and directly eliminate cancer cells, virus-infected cells, and transplanted organs are:
Memory B cells
Helper T cells (Th)
Cytotoxic T cells
Mast cells
7.
The movement of tension in the tendrils of climbing plants such as peas and grapes depends physiologically on:
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
Water loss through rapid transpiration
Secretion of gluey substances
Degeneration of tendril cells
8.
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+
Chlorine cannot react with the inner 3d electrons
Iron(II) chloride spontaneously sublimes into thin air
The reaction occurs strictly in an alkaline medium
9.
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
10.
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
Pairing of all electrons in the outer valence level
Half-filled (3d5) and completely filled (3d10) d-subshells respectively
11.
Okazaki Fragments formed on the die strip (5' to 3') During DNA replication they are joined by an enzyme:
Helix enzyme
Tac polymerase enzyme
DNA ligase
Polymerase enzyme
12.
The pulling movement occurs in bulbs and corms (such as carcasses and daffodils) with the aim of:
Getting rid of carbon dioxide
Repel terrestrial insects
Light absorption for photosynthesis
Pull the stored ground leg down to an appropriate level from the soil surface to secure and support it against the wind
13.
A synthetic chromosome mutation that occurs when a piece of chromosome separates, wraps around itself at an angle of 180 degrees, and then rejoins in the same position is called:
Inversion mutation
Deletion mutation
Repetition mutation
Transmission mutation
14.
Mutations that are inherited to future generations and occur in reproductive cells that produce gametes are called:
Gamete mutations
Temporary spikes
Rebound mutations
Somatic mutations
15.
The ion directly responsible for the explosion of synaptic vesicles and the release of acetylcholine in the neuromuscular synapse cleft is:
Sodium ion Na+
Potassium ion K+
Chloride ion Cl−
Calcium ion Ca2+
16.
The pituitary gland is considered the master of the endocrine glands (the maestro) because:
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
The largest gland by weight
17.
Combined contraceptive pills are considered an effective method because they:
The fallopian tubes close mechanically
It kills sperm
It contains synthetic hormones similar to estrogen and progesterone that inhibit the secretion of FSH and LH from the pituitary, thus preventing the maturation of eggs and the occurrence of ovulation.
Placental abruption
18.
Which of the following oxides is classified as an amphoteric oxide that reacts with both acids and bases to yield salt and water?
Sulfur trioxide (SO3)
Aluminum oxide (Al2O3)
Sodium oxide (Na2O)
Carbon dioxide (CO2)
19.
A metallic cube of side length 10 cm and density 7800 kg/m3 is completely submerged in water (density 1000 kg/m3). The buoyant force (upthrust) acting on the cube is (g = 10 m/s2):
10 N
100 N
68 N
78 N
20.
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:
Vanadium (23V)
Manganese (25Mn)
Cobalt (27Co)
Scandium (21Sc)
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