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Physics QUESTION #4389

If the distance between two charges is halved and the magnitude of charges are also doubled, then the force between these charges becomes:

Two times
Four times
Eight times
Sixteen times✔️

Correct Answer Logic:

By Coulomb's law: $F = k\dfrac{q_1 q_2}{r^2}$. New force: $F' = k\dfrac{(2q_1)(2q_2)}{(r/2)^2} = k\dfrac{4q_1q_2}{r^2/4} = \dfrac{16kq_1q_2}{r^2} = 16F$. The force becomes $\mathbf{16}$ times.

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Bio-Technology QUESTION #10589

Question 2

For a product secreted extracellularly into the fermentation broth, the first DSP step is typically:

Cell disruption by high-pressure homogenisation
Cell separation by centrifugation or filtration to remove biomass✔️
Ion-exchange chromatography to bind the product
Precipitation with ammonium sulphate

Correct Answer Logic:

For extracellular products, cells are the contaminant — they are removed first. Centrifugation (continuous disc-stack centrifuges) or tangential flow filtration (TFF)/microfiltration separate cells from the product-containing broth. This clarified supernatant then undergoes concentration and purification steps. For intracellular products, cell disruption (homogenisation, bead milling) must precede separation.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3219

Question 3

Which hormone is responsible for the development of male secondary sex characteristics?

Progesterone
Aldosterone
Testosterone✔️
Prolactin

Correct Answer Logic:

Testosterone promotes muscle growth, voice deepening, and hair growth.

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Math Physics Chemistry Biology QUESTION #516

Question 4

End product of hemoglobin break down is:

Creatinine
Bilirubin✔️
Hypoxanthin
Xanthin

Correct Answer Logic:

Hemoglobin breaks down to bilirubin

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Geography QUESTION #6307

Question 5

Which environmental transformation represents the most significant anthropogenic modification of the nitrogen cycle?

Deforestation reducing nitrogen fixation by legumes
Haber-Bosch process creating reactive nitrogen for fertilizers✔️
Burning fossil fuels releasing NOx compounds
Wetland drainage reducing denitrification

Correct Answer Logic:

The Haber-Bosch process (converting N2 to NH3 for fertilizers) has doubled the amount of reactive nitrogen entering the biosphere annually - the single largest human modification of the nitrogen cycle, exceeding all natural terrestrial nitrogen fixation combined.

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Accounting Finance and Punjab Sales Tax on Services QUESTION #2556

Question 6

Under section 16C of the Punjab Sales Tax on Services Act, 2012, a registered person shall NOT be allowed to adjust input tax in a tax period in excess of what percentage of the output tax for that tax period?

Seventy percent
Eighty percent
Ninety percent✔️
One hundred percent

Correct Answer Logic:

Section 16C(1) as amended provides that a registered person shall not be allowed to adjust input tax in a tax period in excess of ninety percent of the output tax for that tax period.

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Math Physics Chemistry Biology QUESTION #7726

Question 7

Enzymatic activity can be reduced by which of the following agents?

Heavy metal ions✔️
Methane
Mutase
Noble gases

Correct Answer Logic:

Heavy metal ions (like Hg²⁺, Pb²⁺, Ag⁺) bind to sulfhydryl (-SH) groups on enzymes, causing denaturation or inhibition. Methane is inert, mutase is an enzyme, and noble gases are chemically unreactive.

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General Knowledge QUESTION #8865

Question 8

Which city is located on two continents (Europe and Asia)?

Istanbul✔️
Ankara
Amsterdam
London

Correct Answer Logic:

Istanbul straddles Europe and Asia across the Bosphorus.

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Boilers Mechanical Engineering QUESTION #4079

Question 9

'Emergency Shut Down' (ESD) button should be located:

Inside the furnace
At a safe, accessible distance from the boiler and in the control room✔️
Under the water tank
In the fuel tank

Correct Answer Logic:

Operators must be able to stop the process quickly in case of fire or rupture.

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English QUESTION #504

Question 10

VAGUE

Respectful
Uncertain✔️
Warlock
Snow white

Correct Answer Logic:

Vague means unclear or uncertain

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Education QUESTION #7576

Question 11

A Progressivist teacher places more emphasis on which aspect of education?

Abstract ideas
Practical education✔️
Theoretical concept
Methods

Correct Answer Logic:

Progressivism emphasizes practical, experiential, and hands-on education that connects learning to real-life situations and student interests.

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Business, Public administration and Policy QUESTION #10501

Question 12

In the policy cycle, "agenda setting" refers specifically to:

Identifying problems that decision-makers will act upon✔️
Developing formal policy statements and legislation
Putting approved policies into operational action
Implementing and monitoring government programs

Correct Answer Logic:

Agenda setting is the stage in the policy process where certain problems are identified, defined, and elevated to the attention of policymakers for action. Not all social problems become policy issues — agenda setting is shaped by political actors, interest groups, media, focusing events, and public opinion. It determines what government will decide about.

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Verbal Reasoning QUESTION #8103

Question 13

Compare the two quantities below.

Column A: $(0.82)^2 \cdot (0.82)^3$

Column B: $(0.82)^6$

Column A is greater✔️
Column B is greater
The two quantities are equal
The relationship cannot be determined from the information given

Correct Answer Logic:

Using the rule of exponents: $(0.82)^2 \cdot (0.82)^3 = (0.82)^{2+3} = (0.82)^5$.

Now compare $(0.82)^5$ vs $(0.82)^6$.

Since $0 < 0.82 < 1$, multiplying by $0.82$ makes the number smaller. Therefore $(0.82)^5 > (0.82)^6$.

Column A is greater.

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Math Physics Chemistry Biology QUESTION #11386

Question 14

Which one is NOT a function of the large intestine?

Absorption of electrolytes
Reabsorption of water
Absorption of amino acids✔️
Absorption of amino acids

Correct Answer Logic:

Absorption of amino acids is NOT a function of the large intestine. Amino acids are absorbed in the small intestine (mainly duodenum and jejunum) via active transport. The large intestine's primary functions are reabsorption of water, absorption of electrolytes (Na⁺, Cl⁻), vitamin K production by bacteria, and formation/expulsion of feces.

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The Constitution of Pakistan QUESTION #9362

Question 15

What is the constitutional status of the Principles of Policy under Article 30(2)?

Courts can enforce them on petition
They are justiciable and actionable against the State
The validity of an act or law cannot be called into question on the ground of non-compliance with the Principles✔️
They bind the executive but not the legislature

Correct Answer Logic:

Article 30(2) categorically states: 'The validity of an action or of a law shall not be called in question on the ground that it is not in accordance with the Principles of Policy.' This makes the Principles morally aspirational but legally non-justiciable — courts cannot invalidate state action for failing to follow them.

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General Knowledge QUESTION #11513

Question 16

Google was officially founded on which date?

September 4, 1998✔️
March 6, 1998
January 14, 1998
August 20, 1998

Correct Answer Logic:

Google was officially founded on September 4, 1998 by Larry Page and Sergey Brin while PhD students at Stanford University. The company was initially incorporated in a Menlo Park garage. 'Google' is a play on 'googol' (1 followed by 100 zeros), reflecting the mission to organise vast web information.

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Math Physics Chemistry Biology QUESTION #808

Question 17

Which is not a calcareous material?

Clay✔️
Marble
Lime
Marine shell

Correct Answer Logic:

Calcareous materials contain calcium carbonate $(\text{CaCO}_3)$. Marble, lime, and marine shells are all calcareous. Clay is an aluminosilicate and is not calcareous.

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MCQs Section QUESTION #5304

Question 18

علامہ اقبال کا پہلا شعری مجموعہ کون سا تھا؟

ارمغانِ حجاز
اسرارِ خودی
بانگِ درا✔️
ان میں سے کوئی نہیں

Correct Answer Logic:

بانگِ درا (1924ء) علامہ اقبال کا پہلا اردو شعری مجموعہ ہے۔

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Chemistry QUESTION #7111

Question 19

For the redox reaction $Zn(s) + Cu^{2+}(aq) \rightleftharpoons Zn^{2+}(aq) + Cu(s)$ at $300\text{ K}$, given $E^{0}_{cell} = 2\text{ V}$, $R = 8\text{ J K}^{-1}\text{ mol}^{-1}$, and $F = 96000\text{ C mol}^{-1}$, calculate the approximate equilibrium constant ($K$).

$e^{-80}$
$e^{-160}$
$e^{320}$
$e^{160}$✔️

Correct Answer Logic:

The relationship is $\Delta G^{0} = -nFE^{0} = -RT \ln K$. Here $n=2$.
$-2 \times 96000 \times 2 = -8 \times 300 \times \ln K$
$-384000 = -2400 \ln K$
$\ln K = \frac{384000}{2400} = 160$. Therefore, $K = e^{160}$.

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Disaster Management QUESTION #6562

Question 20

What makes gender-disaggregated data collection essential for effective DRR rather than just good practice?

International requirements
It reveals differential vulnerabilities, capacities, and needs that would otherwise remain invisible, enabling targeted and effective interventions✔️
Statistical completeness
Donor expectations

Correct Answer Logic:

Section 13.1 emphasizes gender-disaggregated data to identify specific vulnerabilities. Without disaggregated data, DRR interventions risk being designed for 'average' populations, missing critical gender-specific vulnerabilities (GBV risks, caregiving burdens, resource access) that require targeted responses.

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