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Physics QUESTION #1179

Gauss's law is applicable to charges which are:

Closely distributed in space
Sparsely distributed in space
Enclosed by a broken surface
Enclosed by a closed surface✔️

Correct Answer Logic:

Gauss's law states that the total electric flux through a closed (Gaussian) surface is proportional to the total charge enclosed: $\oint \vec{E} \cdot d\vec{A} = \frac{Q_{\text{enc}}}{\varepsilon_0}$. The surface must be a closed surface — it cannot be a broken or open surface. The distribution of charges (close or sparse) does not affect the applicability of the law.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3559

Question 1342

The 'Rhizome' is a:

Vertical root
Horizontal underground stem✔️
Flower part
Fruit

Correct Answer Logic:

Ginger and Turmeric are examples of medicinal rhizomes.

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Psychology QUESTION #11358

Question 1343

A chicken is repeatedly rewarded for pecking at a medium gray dish and not rewarded for pecking at a light gray dish When presented for the first time with a medium gray dish and a dark gray dish, the chicken will:

peck at the dark grey dish
peck at the medium grey dish✔️
avoid pecking at either dish
peck indiscriminately at both dishes

Correct Answer Logic:

The chicken will peck at the medium grey dish due to prior conditioning.

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Pharmacology and Toxicology QUESTION #3859

Question 1344

Which mechanism accounts for the anticonvulsant action of phenytoin in reducing seizure activity?

Sodium channel blockade✔️
Binds to synaptic vesicle protein 2A
Binds to voltage-dependent calcium channels
Inhibits glutamate release

Correct Answer Logic:

Phenytoin stabilises neuronal membranes by blocking voltage-gated $\text{Na}^+$ channels, preventing the rapid repetitive firing of action potentials that underlies seizure propagation.

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Adult Health [Medicine and Surgery] QUESTION #3919

Question 1345

A 22-year-old woman complains of chronic fatigue and heavy menstrual periods. Lab results show $ ext{Hb } 90 ext{ g/L}$ and $ ext{MCV } 70 ext{ fL}$. Which of the following is the most likely cause of her anemia?

Iron deficiency anemia✔️
Beta-thalassemia trait
Sideroblastic anemia
Anemia of chronic disease

Correct Answer Logic:

No explanation provided for this question.

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Home Economics QUESTION #6266

Question 1346

Which enzyme is responsible for the initial digestion of starch in the buccal cavity?

Trypsin
Salivary Amylase✔️
Lipase
Pepsin

Correct Answer Logic:

Salivary amylase (ptyalin) begins the chemical breakdown of complex carbohydrates into maltose.

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MCQs Section QUESTION #5160

Question 1347

تصادق حسین خالد، میراجی اور این ایم راشد میں کیا مشترک ہے؟

مزاح نگاری
معری نظم
آزاد نظم✔️
ان میں سے کوئی نہیں

Correct Answer Logic:

تصادق حسین خالد، میراجی اور این ایم راشد تینوں آزاد نظم کے علمبردار شعراء تھے۔

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3390

Question 1348

In DNA, 'Adenine' ($A$) always pairs with which nitrogenous base?

Cytosine ($C$)
Guanine ($G$)
Thymine ($T$)✔️
Uracil ($U$)

Correct Answer Logic:

A pairs with T via two hydrogen bonds; G pairs with C via three.

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Security Measures to Maintain Law and Order QUESTION #872

Question 1349

In the event of a "Bomb Threat" against a specific flight, the aircraft must be moved to:

The main gate
The cargo terminal
An Isolated Aircraft Parking Position (IAPP)✔️
The runway center

Correct Answer Logic:

An IAPP is a pre-designated remote area located at a safe distance from other aircraft and buildings.

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Education QUESTION #6919

Question 1350

What does current research indicate about the long-term effectiveness of traditional punishment and exclusion as primary disciplinary tools?

They are the most effective long-term tools because they create strong deterrents
They provide short-lived relief but are largely ineffective in the long term and may worsen disruptive behavior over time✔️
They are effective for minor infractions but should be reserved for serious rule violations
Their effectiveness depends entirely on the consistency with which they are applied

Correct Answer Logic:

Educational research consistently demonstrates that punishment and exclusion provide only temporary behavioral suppression without addressing the underlying causes of misbehavior. Over time, reliance on these strategies can escalate behavioral problems, damage the student-teacher relationship, and increase alienation — the opposite of the social competence development that leads to genuine long-term behavioral improvement.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3332

Question 1351

'Tyndallization' is a process of:

Freezing bacteria
Intermittent sterilization using steam at $100^\circ\text{C}$✔️
Using UV light
Using sound waves

Correct Answer Logic:

It is used for materials that might be damaged by the higher temperatures of an autoclave.

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Chemistry QUESTION #5576

Question 1352

The strongest acid among the following compounds is:

HCOOH (formic acid)
$CH_3CH_2CH(Cl)CO_2H$ (2-chlorobutanoic acid)✔️
$ClCH_2CH_2CH_2COOH$ (4-chlorobutanoic acid)
$CH_3COOH$ (acetic acid)

Correct Answer Logic:

Acid strength increases with electron-withdrawing inductive effect of substituents closer to the –COOH group. In option B, Cl is at the $\alpha$-carbon (adjacent to –COOH), providing maximum inductive withdrawal. In option C, Cl is at the $\gamma$-position (far from –COOH), with much weaker inductive effect. Formic acid (A) is stronger than acetic acid (D) but weaker than $\alpha$-chloro acid.

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General Science and Ability QUESTION #187

Question 1353

Which source of energy is caused by uneven heating of earth’s surface?

Wind✔️
Solar
Biomass
None of these

Correct Answer Logic:

Wind is generated by atmospheric pressure differences caused by uneven solar heating.

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Pakistan Affairs QUESTION #9091

Question 1354

Which pass connects Pakistan with China?

Khunjerab Pass✔️
Khojak Pass
Khyber Pass
Bolan Pass

Correct Answer Logic:

The Khunjerab Pass is on the Karakoram Highway.

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Islamic Studies QUESTION #8205

Question 1355

In which Surah obligations of ablution are described?

Al-Baqrah
AL-Maidah✔️
Al-Noor
Al-Anaam

Correct Answer Logic:

Surah Al-Maidah (5:6) contains the detailed commandment about ablution (Wuzu). The verse prescribes: washing the face, washing both hands up to elbows, wiping the head, and washing both feet to the ankles. It also mentions Tayammum (dry ablution with clean earth) when water is unavailable. This verse provides the fundamental method of purification required before Salah and Quranic recitation.

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Geography QUESTION #6319

Question 1356

In the context of sustainable agriculture, the concept of 'ecological footprint' for food production measures:

Land area required to produce food and absorb waste✔️
Carbon emissions per kilogram of food produced
Water usage per calorie of food energy
Pesticide residues in agricultural products

Correct Answer Logic:

Ecological footprint measures the biologically productive land and water area required to: (1) produce the resources consumed and (2) absorb the wastes generated. For agriculture, it accounts for crop/pasture land plus the area needed to sequester CO2 and process other wastes.

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