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Math Physics Chemistry Biology QUESTION #7766

Which characteristic does NOT apply to smooth muscle?

Controlled by autonomic nervous system
Spindle-shaped cells
Lines the wall of the heart✔️
Lack striations

Correct Answer Logic:

Smooth muscle lines walls of hollow organs (blood vessels, intestines, bladder). Cardiac muscle lines the heart wall. Smooth muscle lacks striations, is involuntary, and cells are spindle-shaped.

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Pakistan Affairs QUESTION #614

Question 2

Who is the author of the book, 'The Reluctant Fundamentalist'?

Muhsin Hamid✔️
Mohammad Hanif
Mohammad Hussain
None of these

Correct Answer Logic:

This world-renowned novel was written by Mohsin Hamid .

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5759

Question 3

The mechanism of action for Tubocurarine involves:

Persistent depolarization
Irreversible inhibition of Acetylcholinesterase
Competitive blockade of nicotinic receptors✔️
Activation of Muscarinic receptors

Correct Answer Logic:

Tubocurarine is a non-depolarizing (competitive) blocker of nicotinic receptors.

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Education QUESTION #6791

Question 4

When conducting item analysis after scoring, a test developer finds that distractor 'B' in a particular MCQ was selected by 0% of examinees. What is the MOST appropriate action and why?

Keep the item; if the correct answer was chosen by most, the item is working as intended
Remove or revise distractor 'B' because a distractor chosen by no one contributes nothing to the measurement function of the item — it might as well not exist, reducing the item to a three-choice question✔️
Replace the entire item with a true/false question
Increase the item difficulty by making distractor B more similar to the correct answer

Correct Answer Logic:

A distractor that attracts 0% of responses is non-functional — it does not confuse any uninformed examinees. This wastes one response option, effectively reducing a four-choice item to three choices, which increases the guessing probability from 25% to 33%. The distractor analysis should identify such non-functioning options for revision or replacement with more plausible alternatives.

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Security Measures to Maintain Law and Order QUESTION #869

Question 5

Under Section 6(1)(e), the ASF is responsible for "prevention of hijacking." If a plane is hijacked on the tarmac, the primary ASF response is:

Storming the plane immediately
Containment and Cordon✔️
Refueling the plane
Direct negotiation

Correct Answer Logic:

The first priority for ground security is "containment"—preventing the aircraft from taking off and securing the perimeter.

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General Knowledge QUESTION #8771

Question 6

After independence, the first industrial unit inaugurated by Quaid-i-Azam Muhammad Ali Jinnah was:

Adamjee Paper Mills
Valika Textile Mills✔️
Karachi Shipyard and Engineering Works
Pakistan Jute Mills

Correct Answer Logic:

Jinnah inaugurated Valika Textile Mills in Karachi.

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Chemistry QUESTION #1085

Question 7

For the reaction $\text{C(s)} + 2\text{H}_2\text{(g)} \to \text{CH}_4\text{(g)}$; $\Delta H = -74.8\ \text{kJ mol}^{-1}$. Which diagram accurately represents this reaction?

Diagram with R higher than P by 74.8, with activation energy hump above R
Diagram with P higher than R by 74.8, with R lower
Diagram with R and P at same level, hump of 74.8 above
Diagram with P lower than R by 74.8 kJ, hump above R then drop to P✔️

Correct Answer Logic:

Since $\Delta H = -74.8\ \text{kJ mol}^{-1}$ (exothermic), products (P) are lower in energy than reactants (R) by 74.8 kJ. The diagram should show R at higher energy, a transition state hump above R, then P at lower energy with the difference being 74.8 kJ. Option (4) correctly shows this: R is lower baseline, hump above, P drops 74.8 below R.

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General Abilities QUESTION #4496

Question 8

Which of the following is a prime number?

$21$
$27$
$29$✔️
$33$

Correct Answer Logic:

$29$ has only two factors: $1$ and $29$. Others: $21 = 3 \times 7$, $27 = 3^3$, $33 = 3 \times 11$

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Chemistry QUESTION #1075

Question 9

The oxidation states of the underlined elements in $\underline{\text{K}}\text{O}_2$, $\text{H}_2\underline{\text{O}}_2$ and $\text{H}_2\underline{\text{S}}\text{O}_4$ are respectively:

$+1, -2,$ and $+4$
$+4, -4,$ and $+6$
$+1, -1,$ and $+6$✔️
$+2, -2,$ and $+6$

Correct Answer Logic:

In KO$_2$ (potassium superoxide): K is +1, O$_2^-$ so O is $-\frac{1}{2}$... but underlined is K: $+1$. In H$_2$O$_2$: underlined O has oxidation state $-1$. In H$_2$SO$_4$: underlined S has oxidation state $+6$. So the answer is $+1, -1, +6$.

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Mathematics QUESTION #6962

Question 10

Given $x=\sin^{-1}(\sin 10)$ and $y=\cos^{-1}(\cos 10)$, find $y-x$.

10
$7\pi$
$\pi$✔️

Correct Answer Logic:

Note $10$ radians. Since $3\pi\approx9.42$ and $4\pi\approx12.57$: $3\pi<10<4\pi$.

For $x$: $\sin^{-1}(\sin10)$. Principal range $[-\pi/2,\pi/2]$. $10\approx10-3\pi\approx0.58$, but $10-(3\pi)\approx0.58<\pi/2$? $3\pi\approx9.42$, $10-3\pi\approx0.58$. Since $\sin(10)=\sin(\pi-(10-3\pi))=\sin(4\pi-10)$... more carefully: $10 = 3\pi + (10-3\pi)$, $\sin(10)=\sin(3\pi+(10-3\pi))=-\sin(10-3\pi)$. So $x=\sin^{-1}(-\sin(10-3\pi))=-(10-3\pi)=3\pi-10$.

For $y$: $\cos^{-1}(\cos10)$, range $[0,\pi]$. $10-3\pi\approx0.58\in[0,\pi]$, so $y=10-3\pi$... wait: $\cos(10)=\cos(4\pi-10)$ and $4\pi-10\in[0,\pi]$. So $y=4\pi-10$.

$y-x=(4\pi-10)-(3\pi-10)=\mathbf{\pi}$

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General Knowledge QUESTION #8835

Question 11

Which of the following is a military alliance?

ASEAN
NAFTA
NATO✔️
EEC

Correct Answer Logic:

NATO is a military alliance.

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Education QUESTION #6742

Question 12

A teacher observes that direct instruction works well for procedural knowledge but students struggle with conceptual understanding. This MOST suggests the need for:

More direct instruction
Varied instructional models matched to learning goals✔️
Eliminating conceptual content
Reducing instructional time

Correct Answer Logic:

Different content types and learning goals require different instructional approaches. Procedures may benefit from direct instruction; concepts may require inquiry, discovery, or discussion. Effective teachers match methods to goals rather than using one approach universally.

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Reading and Writing (Module-1) QUESTION #5445

Question 13

In 2010, archaeologist Noel Hidalgo Tan noticed red paint markings on Angkor Wat's ____ the help of digital imaging, he discovered over 200 paintings.

walls, with
walls with
walls so with
walls. With✔️

Correct Answer Logic:

A period creates two complete sentences: "...on the temple walls. With the help of..."

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5781

Question 14

Under Section 23 of the Drug Act, selling a drug without a valid warranty from the manufacturer is:

Legal
A minor offence
A prohibited act✔️
Encouraged

Correct Answer Logic:

Section 23 forbids selling drugs without a manufacturer's warranty[cite: 7].

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Statistics QUESTION #1982

Question 15

The partial correlation coefficient $r_{12.3}$ between $X_1$ and $X_2$ after eliminating the linear effect of $X_3$ is computed as the simple correlation between:

$X_1$ and $X_2$ directly
The residuals $X_{1.3}$ and $X_{2.3}$ from their respective regressions on $X_3$✔️
The standardized values of $X_1$ and $X_2$
The ranked values of $X_1$ and $X_2$

Correct Answer Logic:

The partial correlation $r_{12.3}$ is defined as the Pearson correlation between the residuals $X_{1.3} = X_1 - \hat{X}_{1|X_3}$ and $X_{2.3} = X_2 - \hat{X}_{2|X_3}$. This removes the linear influence of $X_3$ from both $X_1$ and $X_2$ before computing their correlation.

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Accounting & Finance QUESTION #6219

Question 16

In an 'Operational Audit', the auditor focuses on 'Efficiency' and 'Effectiveness'. These criteria are often considered:

Clearly defined by International Financial Reporting Standards (IFRS)
Subjective and difficult to evaluate objectively✔️
Strictly limited to accounting and financial records
Mandated by the Companies Ordinance 1984 for all firms

Correct Answer Logic:

Efficiency and effectiveness are more difficult to evaluate objectively than compliance or financial presentation, making operational auditing more like management consulting.

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