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#1
By Kalsoom Tahir
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Medium
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Fact Checked
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12 Oct 2026
Which discovery adapted a bacterial immune system into a tool for precise, programmable genome editing?
💡 Explanation:CRISPR-Cas9 was discovered as a natural adaptive immune mechanism in bacteria; it was later adapted into a revolutionary technology for targeted DNA editing.
#2
By Ahmed Akber
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Medium
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Fact Checked
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30 Aug 2026
What did Edwin Hubble’s 1929 observation of galactic redshift primarily prove about the universe?
💡 Explanation:Hubble discovered that distant galaxies are moving away from Earth at speeds proportional to their distance, providing the first evidence that the universe is expanding.
#3
By Ahmed Akber
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Medium
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Fact Checked
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30 Jul 2026
What core principle of the Steady State theory was directly contradicted by the discovery of the Cosmic Microwave Background?
💡 Explanation:The discovery of the Cosmic Microwave Background (CMB) provided evidence of a hot, dense early universe, disproving the Steady State theory's requirement that the universe maintains a constant density via the continuous creation of matter.
#4
By Rabia Anum
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Medium
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Fact Checked
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23 Jun 2026
Which scientist discovered the neutron within the atomic nucleus in 1932?
💡 Explanation:James Chadwick discovered the neutron in 1932, a neutral particle in the nucleus, which was pivotal for the advancement of nuclear physics and the atomic model.
#5
By Kalsoom Tahir
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Hard
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Fact Checked
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11 Mar 2026
What is the primary role of the Cas9 protein during the application of CRISPR technology in genomic engineering?
💡 Explanation:In the CRISPR-Cas9 system, Cas9 functions as a nuclease (molecular scissors) that cuts both strands of the DNA at a location specified by the guide RNA. The subsequent repair of this break by the cell's own mechanisms allows for precise gene editing.
#6
By Rabia Anum
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Easy
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Fact Checked
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20 Feb 2026
Penicillin, discovered by Alexander Fleming, is primarily used in clinical practice to treat infections caused by which microorganism?
💡 Explanation:Alexander Fleming discovered Penicillin in 1928. As the first true antibiotic, it is specifically used to treat bacterial infections by inhibiting cell wall synthesis.
#7
By Ahmed Akber
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Hard
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Fact Checked
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24 Jan 2026
Which 5′ to 3′ DNA primer is complementary to the template strand 3′-G C A T T A G C-5′?
💡 Explanation:The structure of DNA (double helix) dictates that strands must be complementary (A pairs with T, G pairs with C) and anti-parallel. The template 3'-G C A T T A G C-5' requires a primer running 5' to 3' with the reverse complement sequence: 5'-C G T A A T C G-3'. This question tests the application of the fundamental principles of DNA structure in molecular biology.
#8
By Rabia Anum
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Medium
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Fact Checked
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22 Jan 2026
The discovery of penicillin is considered the start of the age of which major medical breakthrough?
💡 Explanation:Penicillin was the first widely effective antimicrobial agent, and its introduction, beginning in the 1940s, is universally recognized as ushering in the 'age of antibiotics,' which fundamentally changed the treatment of bacterial infectious diseases.
#9
By Ahmed Akber
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Hard
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Fact Checked
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20 Jan 2026
Which scientific discovery fundamentally introduced probabilistic laws over strict determinism at the atomic level?
💡 Explanation:Quantum Theory, through key concepts like the Heisenberg Uncertainty Principle and the probabilistic nature of the wave function (Born Rule), established that the precise, simultaneous determination of conjugate variables (like position and momentum) is fundamentally impossible. This inherent, non-reducible uncertainty invalidates the strict determinism that characterized classical Newtonian mechanics when applied to the atomic scale.
#10
By Kalsoom Tahir
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Medium
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Fact Checked
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16 Jan 2026
What fundamental biological process was immediately explained by the double-helix model of DNA?
💡 Explanation:The complementary nature of the two strands in the double-helix model (A pairing with T, and C pairing with G) instantly suggested a mechanism—known as semi-conservative replication—by which each strand could serve as a template for accurately copying the genetic material.
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