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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: Recombinant DNA, Gene Cloning, PCR and Genetic Engineering

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  • Questions count: 20
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1.
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:
4 / 3 (since P1 / T1 = P2 / T2)
127 / 27
2 times
16 / 9
2.
Real gases behave most closely to an ideal gas under conditions of:
Extremely high pressure and low temperature
Very low pressure and high temperature (where intermolecular attraction forces and molecular volumes become negligible)
Zero gravitational acceleration
High pressure and near liquefaction point
3.
Plant hypersensitivity is an effective immunological method that includes:
The plant kills some of its infected tissues and cells locally to prevent the spread of the microbe to healthy tissues
Secreting nectar to attract bees
Root loss
Stomata open at night
4.
According to the Chain Rule, if y = (3 x2 - 5)4, then dy/dx is:
24 x (3 x2 - 5)3
4 (3 x2 - 5)3
6 x (3 x2 - 5)3
12 x (3 x2 - 5)4
5.
The umbilical cord in the human fetus contains blood vessels that are characterized by:
Two arteries transport deoxygenated blood and waste from the fetus to the placenta, and one vein transports oxygenated blood and nutrients from the placenta to the fetus.
All its vessels carry oxygenated blood
One artery and two veins
Devoid of blood vessels
6.
Common and economically beneficial chromosome duplication in the plant kingdom (such as strawberries, wheat, and apples) leads to:
Loss of chlorophyll
Root loss
Larger cells and tissues and larger, sweeter and more productive fruits
Plant sterility and death
7.
The enzyme responsible for separating the two strands of DNA from each other by breaking hydrogen bonds during replication is:
Ligase
Palace enzyme
Helicase enzyme
DNA polymerase
8.
The number of hydrogen bonds between the nitrogenous base pair guanine and cytosine (G - C) is:
3 Hydrogen bonds
4 Links
One bond
Two hydrogen bonds
9.
Antidiuretic hormone (ADH/vasopressin) works to raise blood pressure by:
Smooth blood vessel constriction and water reabsorption in nephrons
Expansion of the arteries
Sodium excretion in urine
Stimulate sweat
10.
The volume expansion coefficient at constant pressure (alpha_v) of an ideal gas is physically measured using:
Joly's bulb apparatus or Charles's apparatus with a dry mercury droplet index
A torsion balance
A venturi meter and manometer
A hydrometer
11.
The thermal multiplex device (PCR - Polymerase Chain Reaction) depends on an enzyme that tolerates high temperatures called:
Taq polymerase enzyme
RNA polymerase enzyme
Amylase enzyme
Human DNA polymerase enzyme
12.
Double fertilization in flowering plants involves two fusions:
The fusion of the zygote nucleus (N) with the egg nucleus (N) to form the zygote (2N), and the fusion of the second nuclei (N) with the two polar nuclei (2N) to form the sperm nucleus.Dosperm (3N)
Fusion of petals with sepals
The fusion of two pollen grains with one egg
Chromosome duplication in Takht cells
13.
The enzyme used in the crucial experiment to verify the experiments of Avery and his colleagues, which completely analyzes DNA and does not affect protein or RNA, is:
Deoxyribonuclease enzyme
pepsin enzyme
DNA polymerase enzyme
Ribonuclease enzyme
14.
According to Chargaff's rules's Rules) In the DNA double helix, the equal ratio is always:
The ratio of adenine A equals thymine T, and the ratio of guanine G equals cytosine C (A+G). = T+C)
A + T = G + C always
A = G And T = C
A / T = 2
15.
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)
Water (H2O)
Chlorine gas (Cl2)
16.
The number of codons that code for the 20 amino acids in the genetic table is equal to:
61 Codons (out of a total of 64 codons after excluding the three stop codons)
32 Codona
20 Codona
64 Codona
17.
The anticodon on the tRNA molecule carrying methionine is:
UAC
CAU
GUA
AUG
18.
A diver descends to a depth of 30 meters in seawater (density = 1030 kg/m3). If atmospheric pressure is 1.013 x 105 Pa and g = 9.8 m/s2, the total absolute pressure experienced by the diver is approximately:
6.06 x 105 Pa
4.04 x 105 Pa (approx. 4.0 atmospheres)
3.03 x 105 Pa
1.01 x 105 Pa
19.
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+
The reaction occurs strictly in an alkaline medium
Chlorine cannot react with the inner 3d electrons
Iron(II) chloride spontaneously sublimes into thin air
20.
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)
Cu2+ ([Ar] 3d9 with 1 unpaired electron)
Cr3+ ([Ar] 3d3 with 3 unpaired electrons)
Zn2+ ([Ar] 3d10 with 0 unpaired electrons)
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