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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.
The hydrostatic pressure exerted by a static homogeneous liquid of density rho at depth h beneath its free surface is expressed by:
P = rho * g * h
P = 1/2 rho * g * h2
P = rho * g / h
P = rho * h / g
2.
The amount of DNA in a human female secondary oocyte compared to a resting somatic skin cell (before replication begins) is:
Quarter
Equal (contains 46 DNA molecules in the form of 23 diploid chromosomes)
Half the quantity
Weakness
3.
Which of the following compounds exhibits polar covalent bonding due to a significant difference in electronegativity between 0.4 and 1.7?
Sodium chloride (NaCl)
Methane (CH4)
Chlorine gas (Cl2)
Water (H2O)
4.
Injection with serum (Antiserum) containing ready-made antibodies to neutralize scorpion venom gives the patient immunity:
Lasting positivity
A rapid and temporary acquired negativity that is not accompanied by memory cells
Innate
Cellular induced
5.
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:
Sulfite (SO32−)
Sulfide (S2−)
Sulfate (SO42−)
Thiosulfate (S2O32−)
6.
DNA polymerase always adds new nucleotides in a specific direction:
From party 3' to 5' only
In both directions together
randomly
From party 5' To party 3' For new growing bar only
7.
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
8.314 J/(mol.K)
1 / 273.15 K−1 (approx. 0.00366 K−1)
8.
The pressure of a gas trapped inside an incandescent light bulb is 0.8 atm at room temperature (27 °C). When the bulb operates, the filament heats the gas to 327 °C at constant volume. The operational pressure is:
2.4 atm
1.2 atm
0.96 atm
1.6 atm
9.
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:
72 cm Hg
80 cm Hg
76 cm Hg
4 cm Hg
10.
The number of amino acid molecules in a polypeptide chain resulting from mRNA translation consisting of 303 nucleotides, including the start and stop codons, is equal to:
100 Amino acid
101 Acid
300 Acid
99 Acid
11.
Boyle's Law states that for a fixed mass of an ideal gas kept at constant temperature, the volume V is:
Inversely proportional to its absolute pressure P (P1 * V1 = P2 * V2)
Directly proportional to pressure
Directly proportional to absolute temperature
Independent of pressure changes
12.
The density of an ideal gas at temperature T and pressure P is rho. If the pressure is tripled and the absolute temperature is halved, the new density becomes:
6 rho (since rho is proportional to P / T)
3 rho
1.5 rho
0.67 rho
13.
Which of the following first-row transition metal ions exhibits the highest theoretical magnetic moment in its ground state?
Fe3+ ([Ar] 3d5 with 5 unpaired electrons)
Zn2+ ([Ar] 3d10 with 0 unpaired electrons)
Cu2+ ([Ar] 3d9 with 1 unpaired electron)
Cr3+ ([Ar] 3d3 with 3 unpaired electrons)
14.
The volume expansion coefficient at constant pressure (alpha_v) of an ideal gas is physically measured using:
A torsion balance
A hydrometer
Joly's bulb apparatus or Charles's apparatus with a dry mercury droplet index
A venturi meter and manometer
15.
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
16.
Convection currents responsible for the drift and displacement of tectonic plates operate within which Earth layer?
The liquid outer core
The continental sial crust
The solid lower mantle
The plastic semi-molten Asthenosphere
17.
Polyribosome is a vital cellular structure consisting of:
Accumulated peripheral granules
A large number of ribosomes (up to 100 ribosomes) attach to a single mRNA molecule to translate it simultaneously and quickly build many copies of the protein.
Mitochondrial aggregation
Fusion of two nuclei
18.
Asexual reproduction differs from sexual reproduction in that:
It always requires the formation of gametes
Expensive in energy and time
Provides great genetic diversity
It is based on a single parental individual and maintains genetic stability over generations because it is based on mitosis
19.
The atom in the pentose sugar molecule (dioxyribose) to which the nitrogenous base is linked by a covalent bond is:
Carbon atom number 1' (C1')
Carbon atom number 3'
Carbon atom number 5'
Carbon atom number 2'
20.
When a gas trapped inside a rigid container of fixed volume is heated from 27 °C (300 K) to 127 °C (400 K), its pressure increases by a factor of:
2 times
16 / 9
4 / 3 (since P1 / T1 = P2 / T2)
127 / 27
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