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Pharmacokinetics and Pharmacodynamics QUESTION #3835

Which of the following drugs is known to have the longest elimination half-life among those listed?

Amiodarone✔️
Morphine
Verapamil
Amlodipine

Correct Answer Logic:

Amiodarone has an extremely long half-life of $40$–$55$ days due to extensive tissue distribution and very slow elimination.

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Electrical Engineering QUESTION #2163

Question 402

The open-loop transfer function of a unity feedback system is $G(s) = \frac{K}{s(s+2)(s+4)}$. By the Routh-Hurwitz criterion, the system is marginally stable when $K$ equals:

$48$✔️
$24$
$16$
$8$

Correct Answer Logic:

Characteristic equation: $s^3 + 6s^2 + 8s + K = 0$. Routh array row 3 pivot: $\frac{48-K}{6}$. For marginal stability: $48 - K = 0 \Rightarrow K = 48$.

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Chemistry QUESTION #452

Question 403

Magnesium reacts with hydrogen at high pressure in the presence of catalyst __________ forming magnesium hydride.

Dolomite
MgI?✔️
Mg?N?
Epsom salt

Correct Answer Logic:

MgI? catalyzes the reaction

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Biology QUESTION #4303

Question 404

An active athlete has more stamina compared to a physically inactive person. Which organelle has greatly increased in the muscle cells of athletes?

Nucleus
Mitochondria✔️
Golgi bodies
Smooth endoplasmic reticulum (SER)

Correct Answer Logic:

Mitochondria are the powerhouses of the cell. In athletes, muscle cells have more mitochondria to produce more ATP through aerobic respiration for sustained physical activity.

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Chemistry QUESTION #1021

Question 405

The maximum covalency of a non-metallic group 15 element 'E' with the weakest $E-E$ bond is:

4✔️
6
3
5

Correct Answer Logic:

Group 15 non-metals: N, P, As, Sb. The weakest $E-E$ bond among non-metals is for nitrogen (N–N is weaker than P–P due to lone pair repulsion in small atoms). Nitrogen has no $d$-orbitals and maximum covalency of 4 (e.g., in $\text{NH}_4^+$, using the lone pair to form a dative bond). Maximum covalency of N $= 4$.

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Biology QUESTION #4262

Question 406

Which of the following characters is shared by both skeletal and cardiac muscles?

Presence of Striation✔️
Involuntary control
Multinucleated fibers
Intercalated discs

Correct Answer Logic:

Both skeletal and cardiac muscles are striated due to the regular arrangement of actin and myosin filaments into sarcomeres, visible as cross-striations.

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Logical Reasoning QUESTION #4428

Question 407

Which of the following is the main cause of accidents involving equipment?

Overconfidence
Insufficient maintenance✔️
Fatigue
Poor training

Correct Answer Logic:

Insufficient or improper maintenance of equipment is the primary cause of equipment-related accidents in workplace safety studies. Poorly maintained equipment is more likely to malfunction or fail, leading to accidents.

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Agronomy QUESTION #2074

Question 408

In the context of water use efficiency (WUE), deficit irrigation strategy is agronomically justified when:

Full irrigation always maximizes both yield and profit regardless of water scarcity
Marginal value of the last unit of water applied to the crop (in terms of yield gain) falls below the marginal cost of water supply — intentionally applying less than full ET requirement increases WUE and economic returns per unit water while accepting a modest, manageable yield reduction✔️
Water is abundant and energy costs are negligible
Soil salinity prevents full water application

Correct Answer Logic:

Deficit irrigation deliberately applies water below full ET demand during less sensitive growth stages, exploiting crop drought tolerance to save water. The agronomic justification is economic: when water is scarce or costly, WUE (kg yield per m³ water) and profit per unit water is maximized by deficit irrigation — even with modest yield reduction — compared to fully irrigating a smaller area.

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Education QUESTION #1490

Question 409

Which sociological theory, founded by Karl Marx, argues that social order is based on dominant groups imposing their will on subordinate groups?

Functional Theory
Interactional Theory
Conflict Theory✔️
Phenomenological Theory

Correct Answer Logic:

Conflict Theory, whose intellectual founder is Karl Marx, argues that social order is based on the ability of dominant groups to impose their will on subordinate groups through force, cooptation, and manipulation.

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Security Measures to Maintain Law and Order QUESTION #926

Question 410

How can security personnel best identify a concealed weapon?

By asking everyone
Using metal detectors and X-rays✔️
Randomly selecting baggage
Guessing based on appearance

Correct Answer Logic:

Technical screening is the most reliable way to detect metallic or non-metallic weapons hidden on a person or in bags.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3122

Question 411

The functional unit of the kidney responsible for urine formation is the:

Neuron
Nephron✔️
Ureter
Glomerulus

Correct Answer Logic:

Each kidney contains about one million nephrons.

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English QUESTION #4424

Question 412

The manager accepted the cashier's __________ for coming late.

expalanation
explaination
expinasion
explanation✔️

Correct Answer Logic:

The correct spelling is 'explanation' — a noun meaning a statement that makes something clear. All other options (expalanation, explaination, expinasion) are common misspellings of this word.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2998

Question 413

What is the concentration of alcohol in 'Strong Ginger Tincture'?

$20\%$
$50\%$
$90\%$✔️
$70\%$

Correct Answer Logic:

Strong Ginger Tincture is a high-alcohol preparation, typically containing $90\%$ ethanol.

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Security Measures to Maintain Law and Order QUESTION #885

Question 414

According to Section 7-A, an ASF officer who "willfully neglects" to follow a Law & Order command can be:

Fined 500 Rupees
Dismissed without trial
Court-martialed✔️
Suspended for 2 days

Correct Answer Logic:

Since the 2012 amendment, ASF personnel are subject to the Pakistan Army Act 1952 for serious service offenses, including court-martial.

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Chemistry QUESTION #434

Question 415

The percentage of carbon in medium carbon steel is

0.7-1.5
0.1-0.2
0.2-0.7✔️
1.6-2.00

Correct Answer Logic:

Medium carbon steel has 0.2-0.7% carbon

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City and Regional Planning QUESTION #4966

Question 416

Which urban planning concept emphasizes 15-minute accessibility to daily needs?

Garden City
15-Minute City✔️
Radburn Layout
Satellite Town

Correct Answer Logic:

The 15-Minute City concept, popularized by Carlos Moreno, aims to create neighborhoods where residents can access daily needs (work, shopping, education, healthcare) within a 15-minute walk or bike ride.

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Sociology QUESTION #1670

Question 417

The theoretical concept of 'hegemonic masculinity,' which examines how a dominant form of masculinity is culturally exalted and reproduced within a hierarchy of masculinities to sustain patriarchal social arrangements, was most centrally developed to address which sociological problem?

Explaining how capitalist ideology maintains class hegemony through gender norms
Analyzing how gender inequality is reproduced through the privileging of certain forms of masculinity over others and over femininities
Studying the internal power dynamics and subordination relationships among competing configurations of masculinity✔️
Critiquing the functionalist assumption that gender roles are biologically determined and socially functional

Correct Answer Logic:

Hegemonic masculinity, developed primarily by R.W. Connell (building on Gramsci's concept of hegemony), describes the culturally dominant form of masculinity that legitimizes men's dominance over women and over subordinated masculinities. It is a relational concept focused on the structural reproduction of gender hierarchy through the valorization of particular masculine ideals.

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Pakistan Affairs QUESTION #316

Question 418

Operation "Swift Resort" was launched by:

USA against Afghanistan
Pakistan against India✔️
India against Pakistan
None of these

Correct Answer Logic:

This was the retaliatory aerial strike launched by the PAF on February 27, 2019, following the Balakot incident.

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Statistics QUESTION #1961

Question 419

In a regression model $\hat{Y} = a + bX$, which variable represents the one being estimated or predicted?

Dependent variable $(Y)$✔️
Independent variable $(X)$
Intervening variable
Exogenous variable

Correct Answer Logic:

In regression analysis, the dependent variable (also called response variable) is the one being predicted or estimated. The independent variable $X$ is the predictor.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3256

Question 420

'Hyperventilation' (rapid deep breathing) leads to:

High $CO_2$ levels
Respiratory Alkalosis (low $CO_2$ and high $pH$)✔️
Respiratory Acidosis
Increased $O_2$ in tissues

Correct Answer Logic:

Blowing off too much $CO_2$ makes the blood more alkaline.

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