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By Bernoulli's principle: $P + \dfrac{1}{2}\rho v^2 + \rho gh = $ constant. In the narrower section, velocity increases (continuity equation), so pressure must decrease. Result: high velocity, low pressure.

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Math Physics Chemistry Biology QUESTION #4240

Question 2925

Nodes of Ranvier along the length of myelinated fibers allow:

More diffusion of neurotransmitters
saltatory conduction of nerve impulse✔️
Formation of new synaptic connections
Synthesis of new neurons

Correct Answer Logic:

Nodes of Ranvier enable saltatory conduction.

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Administration QUESTION #2933

Question 2926

Within the "Six Sigma" methodology, what is the primary objective of the "Improve" phase?

Identifying the root causes of existing defects
Implementing and verifying solutions to address problems✔️
Establishing baseline performance metrics
None of these

Correct Answer Logic:

In the DMAIC process, the 'Improve' phase is dedicated to developing, testing, and implementing solutions to eliminate the root causes of defects.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3573

Question 2927

'Pharmacognosy' contributes to the development of new drugs by:

Providing leads from nature
Identifying toxic plants
Ensuring the purity of natural products
All of these✔️

Correct Answer Logic:

Natural products remain a massive source for drug discovery.

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Chemistry QUESTION #450

Question 2928

__________ hybridization leads to a regular tetrahedral structure.

sp?✔️
sp?
sp
All of these

Correct Answer Logic:

sp? hybridization gives tetrahedral geometry

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Chemistry QUESTION #7350

Question 2929

If uncertainty in position $\Delta x$ equals uncertainty in momentum $\Delta p$, then the uncertainty in velocity $\Delta v$ is:

$\sqrt{\dfrac{h}{\pi}}$
$\dfrac{1}{2m}\sqrt{\dfrac{h}{\pi}}$✔️
$\sqrt{\dfrac{h}{2\pi}}$
$\dfrac{1}{m}\sqrt{\dfrac{h}{\pi}}$

Correct Answer Logic:

Heisenberg's Uncertainty Principle: $\Delta x \cdot \Delta p \geq \dfrac{h}{4\pi}$

Given $\Delta x = \Delta p$, so $(\Delta p)^2 = \dfrac{h}{4\pi}$

$\Delta p = \sqrt{\dfrac{h}{4\pi}} = \dfrac{1}{2}\sqrt{\dfrac{h}{\pi}}$

Since $\Delta p = m \cdot \Delta v$:
$\Delta v = \dfrac{\Delta p}{m} = \dfrac{1}{2m}\sqrt{\dfrac{h}{\pi}}$

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The Constitution of Pakistan QUESTION #9339

Question 2930

Under Article 6(2A) of the Constitution, which courts are expressly barred from validating an act of high treason?

Only the Supreme Court
Only the High Courts
The Federal Constitutional Court, the Supreme Court, and all High Courts✔️
Only the Federal Constitutional Court

Correct Answer Logic:

Article 6(2A) (inserted by the 18th Amendment and later updated by the 27th Amendment) explicitly states that an act of high treason 'shall not be validated by any court including the Federal Constitutional Court, Supreme Court and a High Court.' This is a constitutional safeguard against judicial legitimization of coups or unconstitutional takeovers.

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Physics QUESTION #381

Question 2931

Which of the following lights travels the fastest in optical fibres?

Visible light
Invisible infra-red✔️
Ultra-violet
Ordinary light

Correct Answer Logic:

Infrared has less dispersion in optical fibers

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3130

Question 2932

Which 'Meningeal' layer is the outermost, toughest membrane protecting the brain?

Pia mater
Arachnoid mater
Dura mater✔️
Gray matter

Correct Answer Logic:

Dura mater (tough mother) is the thick, protective outer layer.

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Accounting & Finance QUESTION #1203

Question 2933

A not-for-profit organization's annual report emphasizes the use of funds to achieve its mission rather than profitability. This highlights:

Faithful representation in financial reporting.
The focus on accountability over profitability.✔️
Compliance with government regulations.
The reliance on accrual accounting.

Correct Answer Logic:

Not-for-profit organizations are primarily accountable to their donors, members, and the public for how they use their funds to fulfill their mission. Their financial reporting focuses on accountability — demonstrating responsible stewardship of resources — rather than generating profit for owners or shareholders.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3624

Question 2934

An 'Allergen' is a substance that:

Causes a disease
Triggers an allergic reaction (hypersensitivity)✔️
Cures a headache
Increases energy

Correct Answer Logic:

Allergens stimulate the immune system to react excessively.

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Pakistan Affairs QUESTION #314

Question 2935

Pakistan's contribution to UN Peacekeeping constitutes over ____ of total deployment.

7%
9%✔️
11%
13%

Correct Answer Logic:

Pakistan has historically been one of the top troop contributors, roughly making up 9% of UN forces.

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General Knowledge QUESTION #8743

Question 2936

Which country has recently been granted Observer status in the Organization of Islamic Conference (OIC)?

China
Russia✔️
India
None above

Correct Answer Logic:

Russia was granted OIC observer status in 2005.

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Ability / HR / Governance / Special Education QUESTION #1852

Question 2937

Who is the appointing authority for posts in BPS 17 to 19?

Prime Minister
Secretary of the Ministry or Division concerned✔️
An officer notified by the Secretary
Establishment Division

Correct Answer Logic:

Rule 6(1) Table entry (2) specifies the Secretary of the Ministry or Division concerned as appointing authority for posts in BPS 17 to 19.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3487

Question 2938

The alkaloid 'Quinine', used to treat Malaria, is extracted from:

Cinchona bark✔️
Ipecac root
Opium poppy
Tea leaves

Correct Answer Logic:

Cinchona (Family: Rubiaceae) is the primary source of antimalarial alkaloids.

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English QUESTION #2732

Question 2939

Change to PASSIVE VOICE: 'The teacher teaches the students.'

The students were taught by the teacher.
The students are taught by the teacher.✔️
The students teach the teacher.
The students have been taught by the teacher.

Correct Answer Logic:

In passive voice for simple present: Subject + is/am/are + past participle + by + agent. 'The students are taught by the teacher' correctly converts the active voice sentence.

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Biology Zoology Botany QUESTION #10833

Question 2940

The continuing and intimate associations between two different species — where at least one benefits — are called:

Carnivore interactions
Herbivore interactions
Autotrophic association
Symbiosis✔️

Correct Answer Logic:

Symbiosis (Greek: 'living together') refers to the long-term, intimate biological interaction between two different species. It encompasses: mutualism (both benefit), commensalism (one benefits, other unaffected), and parasitism (one benefits, other harmed). Examples: nitrogen-fixing bacteria in legume root nodules (mutualism); barnacles on whale skin (commensalism); tapeworms in intestines (parasitism).

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