Reading Mode - Questions

Ozone ($\text{O}_3$) causes characteristic leaf curling, chlorosis (yellowing), and necrosis in sensitive plant species. Ground-level ozone (a secondary pollutant formed from NOₓ and VOCs in sunlight) enters leaves through stomata and causes oxidative damage to cell membranes, disrupting photosynthesis. $\text{SO}_2$ causes bleaching and marginal necrosis; $\text{CO}$ has less direct phytotoxic effect; $\text{H}_2\text{S}$ causes stomatal closure.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3341

Question 364

'Log Phase' of bacterial growth is the period of:

Slow adjustment
Rapid exponential growth✔️
Cell death
No change in number

Correct Answer Logic:

During the log (logarithmic) phase, the population doubles at a constant rate.

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Contracts QUESTION #5852

Question 365

A Seller provides a sample of a fabric to a Buyer. The actual shipment is of a lower thread count than the sample. Has an express warranty been breached?

No, unless the word 'warranty' was used.
Yes, a sample or model creates an express warranty that the goods will conform.✔️
No, samples are considered 'puffery'.
Yes, but only if the Buyer is a merchant.

Correct Answer Logic:

Under UCC §2-313(1)(c), any sample or model which is made part of the basis of the bargain creates an express warranty that the whole of the goods shall conform to the sample.

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Statistics QUESTION #1957

Question 366

The sum of absolute deviations $\sum |X - A|$ is minimized when deviations are taken from which measure?

Arithmetic Mean
Median✔️
Mode
Geometric Mean

Correct Answer Logic:

The sum of absolute deviations $\sum |X - A|$ is least (minimum) when deviations are measured from the Median. This is a fundamental property of the median.

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English QUESTION #8580

Question 367

What is the one-word substitution for a person who is unable to pay his debts?

Poor
Vegabond
Solvent
Insolvent✔️

Correct Answer Logic:

Insolvent means unable to pay debts.

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Administration QUESTION #9583

Question 368

In comparing Maslow and Herzberg in a Pakistani public sector context, a researcher finds that junior civil servants are more responsive to pay increases than to job enrichment, while senior officers show the opposite pattern. Which integrated theoretical explanation best accounts for this finding?

Maslow's hierarchy operates differently in collectivist cultures — Pakistani employees prioritize social belonging over esteem needs regardless of rank
The findings are consistent with both theories simultaneously — junior officers have unmet lower-order needs (Maslow's safety/physiological) which map to Herzberg's hygiene factors; senior officers have lower-order needs met and are now responsive to Maslow's esteem/self-actualization needs which map to Herzberg's motivators✔️
Herzberg's framework is inapplicable in Pakistan because it was derived from Western professional samples and cannot be generalized across cultures
The findings contradict both theories because public sector employment guarantees eliminate the motivational significance of salary at all levels

Correct Answer Logic:

The most theoretically coherent interpretation maps the two frameworks onto each other: junior officers' unmet physiological/safety needs (Maslow) correspond to Herzberg's hygiene factors (salary), making pay improvements salient motivators for them. Senior officers have satisfied lower-order needs and are now responsive to esteem/self-actualization needs (Maslow) — mapped to Herzberg's true motivators (recognition, responsibility). This integration explains the rank-differentiated pattern.

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Therapeutics and Patient Care QUESTION #3878

Question 369

A patient uses salbutamol and beclometasone MDIs twice daily. In what order should they be used, and with what timing?

Beclometasone 5 minutes after salbutamol✔️
Beclometasone immediately after salbutamol
Beclometasone 5 minutes before salbutamol
Beclometasone immediately before salbutamol

Correct Answer Logic:

The bronchodilator salbutamol should be used first to open airways; beclometasone (the corticosteroid) is then taken 5 minutes later to allow better penetration into the now-dilated bronchi.

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MCQs Section QUESTION #4882

Question 370

Which word is similar to "VOID"

Emptiness✔️
Lea
Anger
Trick

Correct Answer Logic:

Void means a completely empty space or a feeling of emptiness. Emptiness is its closest synonym.

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Reading and Writing (Module-1) QUESTION #10453

Question 371

Critics dismissed the museum's newest exhibit as -------, arguing that its ideas were merely ------- of works displayed decades earlier.

innovative . . departures
derivative . . echoes✔️
provocative . . critiques
original . . rejections

Correct Answer Logic:

An unoriginal exhibit ('derivative') simply repeats, or 'echoes,' earlier works.

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Math Physics Chemistry Biology QUESTION #11301

Question 372

Which effect is produced by a pair of genes located at the same locus in a chromosome, but one gene masks the effect of the other?

Epistasis
Dominance✔️
Recessiveness
Complementary

Correct Answer Logic:

Dominance is the effect where one allele masks the effect of another at the same locus.

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Boilers Mechanical Engineering QUESTION #2514

Question 373

For a beam under pure bending, the assumption that plane sections remain plane (Euler-Bernoulli hypothesis) implies that:

Shear strain across the section is constant
Normal strain varies linearly with distance from the neutral axis✔️
Shear stress is zero everywhere
Normal stress is uniform across the cross-section

Correct Answer Logic:

The Euler-Bernoulli hypothesis leads directly to a linear strain distribution: $\varepsilon = -y/\rho$, where $y$ is distance from the neutral axis and $\rho$ is the radius of curvature. This produces the linear bending stress distribution $\sigma = -My/I$.

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Chemistry QUESTION #7407

Question 374

Which is the correct order for the first ionisation potential (IP₁)?

$\text{Na} > \text{Al}$
$\text{Mg} > \text{Al}$✔️
$\text{Ga} > \text{Ca}$
$\text{Mg} > \text{Be}$

Correct Answer Logic:

IE₁ irregularities:
Generally IE₁ increases left to right, but Al (3p¹) has lower IE₁ than Mg (3s²) because:

Mg has a full 3s² subshell (extra stability)
Al's 3p electron is shielded by 3s electrons and easier to remove

Therefore $\text{Mg} > \text{Al}$ is a correct and expected inequality. This is one of the classic exceptions to the smooth IE trend across period 3.

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English QUESTION #2687

Question 375

Identify the correct modal for 'prohibition': 'You ___ park your car in front of the gate.'

could not
must not✔️
may not
need not

Correct Answer Logic:

'Must not' is used to express a strong prohibition or rule.

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Business, Public administration and Policy QUESTION #10529

Question 376

In Pakistan, the primary constitutional responsibility for controlling all forms of societal corruption rests with:

National Accountability Bureau (NAB)
Federal Investigation Agency (FIA)
Department of Anti-Corruption
None of these — no single body holds this responsibility✔️

Correct Answer Logic:

No single institution in Pakistan is constitutionally mandated to control all types of societal corruption. Multiple overlapping bodies exist: NAB handles mega-corruption cases, FIA handles federal financial crimes, provincial Anti-Corruption Establishments (ACEs) handle provincial corruption, and the FBR handles tax evasion. The fragmented anti-corruption architecture is itself a governance challenge in Pakistan.

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General Knowledge QUESTION #8707

Question 377

The famous genetic disease associated with Queen Victoria and European royalty was:

Colour Blindness
Hemophilia✔️
Austrian lip
Down's Syndrome

Correct Answer Logic:

Hemophilia was prevalent among European royal families.

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MBBS QUESTION #10237

Question 378

Using the Fick principle for cardiac output, $CO = \dfrac{VO_2}{(CaO_2 - CvO_2)}$, a patient has an oxygen consumption of 250 mL/min, an arterial oxygen content of 20 mL/dL, and a mixed venous oxygen content of 15 mL/dL. What is the calculated cardiac output?

2.5 L/min
5 L/min✔️
10 L/min
50 L/min

Correct Answer Logic:

The arteriovenous oxygen difference is $20 - 15 = 5\ \text{mL/dL} = 0.05\ \text{mL/mL}$. $CO = \dfrac{250\ \text{mL/min}}{0.05} = 5000\ \text{mL/min} = 5\ \text{L/min}$ — a normal resting cardiac output, illustrating how the Fick method is used clinically (e.g., during cardiac catheterization) to measure CO.

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Mathematics QUESTION #6021

Question 379

The system $x+ky+3z=0$, $3x+ky-2z=0$, $2x+4y-3z=0$ has a non-zero solution $(x,y,z)$. Find the value of $\dfrac{xz}{y^2}$.

-30
30
-10
10✔️

Correct Answer Logic:

For non-zero solution, $\Delta=0$:

$\begin{vmatrix}1&k&3\\3&k&-2\\2&4&-3\end{vmatrix}=1(−3k+8)−k(−9+4)+3(12−2k)=−3k+8+5k+36−6k=44−4k=0$

So $k=11$.

With $k=11$: from equations 1 and 2: $x+11y+3z=0$ and $3x+11y-2z=0$. Subtracting: $2x-5z=0\Rightarrow x=\frac{5z}{2}$.

Substituting back: $\frac{5z}{2}+11y+3z=0\Rightarrow 11y=-\frac{11z}{2}\Rightarrow y=-\frac{z}{2}$.

$\frac{xz}{y^2}=\frac{\frac{5z}{2}\cdot z}{\frac{z^2}{4}}=\frac{\frac{5z^2}{2}}{\frac{z^2}{4}}=\frac{5}{2}\times4=\mathbf{10}$

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Math Physics Chemistry Biology QUESTION #547

Question 380

Which of the following are colorless?

Chloroplasts
Chromoplasts
Leucoplasts✔️
None of these

Correct Answer Logic:

Leucoplasts are colorless plastids

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