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Agronomy QUESTION #2093

Osmotic adjustment in crops under drought stress is the process by which:

Plants shed their leaves to reduce total transpiring surface area
Cells actively accumulate compatible solutes (proline, glycine betaine, soluble sugars, K⁺) in the cytoplasm and vacuole, lowering osmotic potential and maintaining turgor pressure and metabolic function at lower soil water potentials — enabling continued growth and gas exchange✔️
Roots lose their selective permeability, allowing free water movement into depleted cells
Stomata permanently close to prevent any further water loss

Correct Answer Logic:

Osmotic adjustment (osmoregulation) is an active cellular response to water deficit: solutes accumulate without causing toxicity, lowering $\psi_s$ (osmotic potential) and maintaining positive turgor pressure ($\psi_p = \psi_w - \psi_s$) at lower leaf water potentials. This sustains stomatal opening, photosynthesis, root elongation into dry soil, and metabolic processes — a key drought tolerance mechanism quantified by the Pressure-Volume curve.

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Therapeutics and Patient Care QUESTION #3888

Question 1502

A 50-year-old male treated for pitting oedema of the ankles subsequently develops gynaecomastia and erectile dysfunction. Which diuretic is most likely responsible for these endocrine adverse effects?

Hydrochlorothiazide
Furosemide
Spironolactone✔️
Triamterene

Correct Answer Logic:

Spironolactone is a mineralocorticoid antagonist with anti-androgenic effects. Its adverse effects include gynaecomastia, menstrual irregularities, and erectile dysfunction.

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Chemistry QUESTION #446

Question 1503

Alkanes containing __________ carbon atoms are waxy solids.

up to 4
5 to 17
18 or more✔️
None of these

Correct Answer Logic:

Alkanes with 18+ carbons are waxy solids

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Mathematics QUESTION #4141

Question 1504

For a particle moving on the ellipse $\frac{x^2}{a^2} + \frac{y^2}{b^2} = 1$ with uniform speed $V$, what is the tangential component of acceleration $a_t$?

$\frac{V^2}{a}$
$0$✔️
$\frac{V^2}{b}$
$\frac{dV}{dt}$

Correct Answer Logic:

For uniform speed, $\frac{dV}{dt} = 0$. Since tangential acceleration $a_t = \frac{dV}{dt}$, we have $a_t = 0$.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3629

Question 1505

'Ayurveda' is the traditional system of medicine originating from:

Pakistan
India✔️
China
Egypt

Correct Answer Logic:

Ayurveda means 'The Science of Life' and is an ancient Indian system.

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Education QUESTION #1487

Question 1506

Pavlov's Classical Conditioning experiment demonstrated that dogs could be trained to salivate at the sound of a bell. This bell is an example of:

Unconditioned stimulus
Conditioned (neutral) stimulus✔️
Operant response
Primary reinforcer

Correct Answer Logic:

The bell is a neutral/conditioned stimulus. Pavlov paired it with food (unconditioned stimulus) until the dogs salivated at the bell alone, demonstrating Classical Conditioning.

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English QUESTION #2680

Question 1507

Identify the correct article: 'He is ___ honest man who always speaks the truth.'

a
an✔️
the
no article

Correct Answer Logic:

The word 'honest' begins with a silent 'h' and a vowel sound /o/, requiring 'an'.

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Urdu QUESTION #5082

Question 1508

دن کو بھی یہاں شب کی سیاہی کا سامان ہے، یہ شعر کس کا ہے؟

تلوک چند محروم✔️
انشاء اللہ خان انشاء
حیدر علی آتش
ان میں سے کوئی نہیں

Correct Answer Logic:

یہ شعر تلوک چند محروم کا ہے جو لکھنؤ کے مشہور شاعر تھے۔

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Boilers Mechanical Engineering QUESTION #4081

Question 1509

'Stack Temperature' that is too high usually indicates:

The boiler is clean
Scale or soot buildup on the tubes (poor heat transfer)✔️
The fuel is cheap
The weather is hot

Correct Answer Logic:

Heat is escaping up the chimney instead of going into the water.

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Statistics QUESTION #1974

Question 1510

In an experimental study, the experimental error mainly arises from which source?

Mistakes made by the experimenter
Uncontrolled extraneous (external) factors✔️
Differences in treatment effects
All of the above

Correct Answer Logic:

Experimental error primarily results from extraneous (nuisance) factors not controlled in the experiment. It represents unexplained variability beyond the treatment effects.

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English QUESTION #2719

Question 1511

Which word is spelled correctly?

Separate✔️
Seperate
Saparate
Seperat

Correct Answer Logic:

A common mistake is using 'e' instead of 'a' in the middle of 'separate'.

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Urdu QUESTION #5235

Question 1512

دمِ رخصت وہ چپ رہے عابد، آنکھ میں پھیلتا گیا کاجل، یہ شعر کس کا ہے؟

عزیز احمد
منیر نیازی
سید عابد علی عابد✔️
ان میں سے کوئی نہیں

Correct Answer Logic:

یہ شعر سید عابد علی عابد کا ہے جو اردو شاعری میں ایک منفرد آواز رکھتے تھے۔

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Psychology QUESTION #1466

Question 1513

Which theory of intelligence proposes that there are three types of intelligence: analytical, creative, and practical?

Howard Gardner's Theory of Multiple Intelligences
Robert Sternberg's Triarchic Theory of Intelligence✔️
Spearman's Two-Factor Theory
Cattell-Horn-Carroll Theory

Correct Answer Logic:

Robert Sternberg's Triarchic Theory of Intelligence (1985) proposes three types: (1) Analytical (componential) — academic problem-solving; (2) Creative (experiential) — novel and adaptive thinking; (3) Practical (contextual) — 'street smart', adapting to real-world environments. Gardner's theory proposes 8–9 multiple intelligences; Spearman proposed g-factor and s-factors; Cattell-Horn-Carroll distinguishes fluid and crystallized intelligence.

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Security Measures to Maintain Law and Order QUESTION #943

Question 1514

What should be the priority during a hostage situation at a terminal?

Saving the luggage
Life safety and containment✔️
Immediate media briefing
Capturing the suspect alive only

Correct Answer Logic:

The primary focus is the safety of lives and preventing the suspects from moving to a more sensitive area.

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Urdu QUESTION #5307

Question 1515

'مدعی لاکھ برا چاہے تو کیا ہوتا ہے' یہ مشہور شعر کس شاعر کا ہے؟

نظیر اکبر آبادی
آغا حشر
جوش
داغ✔️

Correct Answer Logic:

یہ مشہور شعر داغ دہلوی کا ہے جو اردو غزل کے استاد شعراء میں شمار ہوتے ہیں۔

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English QUESTION #4456

Question 1516

'The only son of the village lord died yesterday.' In the sentence, the subject is:

Son
The only son✔️
The village lord
None of these

Correct Answer Logic:

The subject is the specific person performing the action (dying), which is 'The only son'. 'Village lord' is part of a prepositional phrase modifying the son.

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City and Regional Planning QUESTION #4971

Question 1517

If a city's population grows from 500,000 to 800,000 over 20 years, what is the annual compound growth rate?

2.3%✔️
2.4%
2.5%
3.0%

Correct Answer Logic:

Using the compound growth formula: $r = \left(\frac{P_t}{P_0}\right)^{1/t} - 1 = \left(\frac{800000}{500000}\right)^{1/20} - 1 = (1.6)^{0.05} - 1 = 0.0237$ or approximately 2.37%, closest to 2.3%.

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Architecture QUESTION #2341

Question 1518

In structural dynamics, the damped natural frequency $\omega_d$ of a SDOF system with critical damping ratio $\xi$ and undamped natural frequency $\omega_n$ is:

$\omega_d = \omega_n (1 + \xi)$
$\omega_d = \omega_n \sqrt{1 - \xi^2}$✔️
$\omega_d = \omega_n \sqrt{1 + \xi^2}$
$\omega_d = \omega_n (1 - \xi)$

Correct Answer Logic:

The damped natural frequency is $\omega_d = \omega_n \sqrt{1 - \xi^2}$. For typical structural damping ($\xi = 0.02$ to $0.05$), $\omega_d \approx \omega_n$. At critical damping ($\xi = 1.0$), $\omega_d = 0$ and the system returns to equilibrium without oscillating.

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General Knowledge QUESTION #2584

Question 1519

Which of the following BEST defines a computer?

A device used only to browse the internet and send emails
A device that stores and processes data by performing calculations✔️
A machine that only displays text and images on a screen
A tool used exclusively for storing documents and photos

Correct Answer Logic:

A computer is defined as a device that stores and processes data by performing calculations. It takes raw input data, processes it, and produces meaningful output — making it far more than just a browsing or display device.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3600

Question 1520

Which method is most commonly used to extract volatile oils from plants?

Maceration
Steam Distillation✔️
Soxhlet Extraction
Cold Pressing

Correct Answer Logic:

Steam distillation is the standard industrial method for capturing volatile oils.

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