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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3092

Question 41

Which protein is known as the 'Thin Filament' in a muscle fiber?

Myosin
Actin✔️
Collagen
Keratin

Correct Answer Logic:

Actin (thin) and Myosin (thick) filaments slide past each other during muscle contraction.

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Physics QUESTION #4407

Question 42

In a pipe of varying cross-section, as fluid enters the narrower region, it exhibits:

High velocity, high pressure
High velocity, low pressure✔️
Low velocity, high pressure
Low velocity, low pressure

Correct Answer Logic:

By Bernoulli's principle: $P + \dfrac{1}{2}\rho v^2 + \rho gh = $ constant. In the narrower section, velocity increases (continuity equation), so pressure must decrease. Result: high velocity, low pressure.

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MCQs Section QUESTION #4908

Question 43

A President entering the final two years of a second term _____ carry out a legislative program.

likely to be at a severe disadvantage and is often unable to✔️
likely severely disadvantaged and often unable to
liable to be severely disadvantaged and cannot often
liable that he or she is at a severe disadvantage and cannot often

Correct Answer Logic:

Likely to be' is the correct idiom and 'is often unable to' provides the needed parallel auxiliary structure. 'Liable' in options C and D implies legal responsibility, which is the wrong meaning here. Option E (not shown) is structurally incoherent. Option B omits a linking verb, making 'likely' a dangling adjective.

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Mechanical Engineering QUESTION #2482

Question 44

The Cartesian method for position analysis of a planar link AB of length $L_{AB}$ with angle $\phi$ to the horizontal uses the constraint equation:

$(x_B - x_A)\sin\phi + (y_B - y_A)\cos\phi = L_{AB}$
$(x_B - x_A)^2 + (y_B - y_A)^2 = L_{AB}^2$✔️
$x_B - x_A = L_{AB}\sin\phi$ and $y_B - y_A = L_{AB}\cos\phi$
$\sqrt{x_B^2 + y_B^2} = L_{AB}$

Correct Answer Logic:

For a rigid link AB of fixed length $L_{AB}$, the geometric constraint is $(x_B-x_A)^2+(y_B-y_A)^2=L_{AB}^2$. This Pythagorean distance constraint is the foundation of the Cartesian method.

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MCQs Section QUESTION #4912

Question 45

A recent New York Times editorial criticized the city's election board for, first of all, failing to replace outmoded voting machines prone to breakdowns, and _____ investigate allegations of corruption involving board members.

secondarily, for their failure to
secondly, for their failure to
secondly, that they failed and did not
second, for failing to✔️

Correct Answer Logic:

Parallel structure requires matching 'for failing…to replace' with 'for failing to investigate.' 'Second' is the preferred GMAT parallel list marker. Options A and B use 'their failure to,' which is not parallel with the gerund 'failing.' Option C uses 'that they failed' which also breaks the parallel.

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Mathematics QUESTION #4127

Question 46

Using Cauchy Residue Theorem, evaluate $\oint_{|z|=2} \frac{5z - 2}{z(z-1)} \, dz$. The poles inside are at:

$z = 0$ only
$z = 1$ only
$z = 0$ and $z = 1$✔️
No poles inside $|z| = 2$

Correct Answer Logic:

Poles at $z = 0$ and $z = 1$. Both satisfy $|z| < 2$, so both are inside the contour.

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Physics and Math QUESTION #776

Question 47

If $y^2 = 3x$, then the equation of latus rectum is:

$x = \dfrac{3}{4}$✔️
$Y = \dfrac{4}{3}$
$Y = \dfrac{1}{3}$
$Y = \dfrac{5}{7}$

Correct Answer Logic:

For parabola $y^2 = 4ax$: $4a = 3 \Rightarrow a = \dfrac{3}{4}$. The latus rectum is the vertical line $x = a = \dfrac{3}{4}$.

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Electrical Engineering QUESTION #2158

Question 48

The transfer function of a second-order system is $H(s) = \frac{\omega_n^2}{s^2 + 2\zeta\omega_n s + \omega_n^2}$. For $\zeta = 0.5$ and $\omega_n = 10\,\text{rad/s}$, the percent peak overshoot in a unit step response is:

$16.3\%$✔️
$4.3\%$
$25.4\%$
$9.5\%$

Correct Answer Logic:

$\%PO = e^{-\pi\zeta/\sqrt{1-\zeta^2}} \times 100 = e^{-\pi(0.5)/\sqrt{0.75}} \times 100 = e^{-1.814} \times 100 \approx 16.3\%$.

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General Knowledge QUESTION #2621

Question 49

A computer's PORTS are best described as:

The internal slots inside the computer where RAM is installed
Connection points that we can connect devices to that extend the functionality of the computer✔️
The software instructions that help the CPU process data
The fans and heat sinks that cool down the computer components

Correct Answer Logic:

Ports are connection points that we can connect devices to that extend the functionality of our computer. Examples include USB ports, HDMI ports, audio jacks, and Ethernet ports — all located on the outside of the computer.

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Economics QUESTION #1717

Question 50

The Enhanced Partnership with Pakistan Act of 2009 — commonly known as the Kerry-Lugar-Berman (KLB) Act — was a major US civilian assistance legislation that allocated USD 7.5 billion over five years primarily for which stated developmental purpose?

Strengthening Pakistan's military capacity and counterterrorism infrastructure
Financing civilian infrastructure and social sector development — particularly energy, education, and governance✔️
Expanding Pakistan's export-oriented manufacturing base and trade facilitation capacity
None of these

Correct Answer Logic:

The Kerry-Lugar-Berman Act (Enhanced Partnership with Pakistan Act, 2009) authorised USD 1.5 billion annually for five years in non-military civilian assistance to Pakistan. Its stated objectives were to support Pakistan's democratic governance, civilian institutions, and socioeconomic development — with specific focus on energy infrastructure (to address the power crisis), education (school construction and teacher training), and economic growth. It explicitly conditioned aid on civilian oversight of the military.

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City and Regional Planning QUESTION #5012

Question 51

In regional input-output analysis, what does a location quotient greater than 1.5 typically suggest?

Local deficiency
Export-oriented sector✔️
Import dependency
Balanced economy

Correct Answer Logic:

LQ > 1.5 indicates the region has significantly higher concentration in that sector than the national average, suggesting specialization and likely export of goods/services to other regions. LQ = 1.0 indicates regional self-sufficiency; LQ < 1.0 suggests import dependency.

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Basic Mathematics QUESTION #2852

Question 52

Find the area of a triangle with base 24 cm and height 10 cm.

110 cm²
120 cm²✔️
130 cm²
240 cm²

Correct Answer Logic:

Area of triangle $= \dfrac{1}{2} \times \text{base} \times \text{height} = \dfrac{1}{2} \times 24 \times 10 = 120 \text{ cm}^2$.

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Agronomy QUESTION #2077

Question 53

Herbicides classified as ACCase (acetyl-CoA carboxylase) inhibitors are selective for:

Broad-leaved dicotyledonous weeds in cereal crops
Grass (monocot) weeds — because the ACCase enzyme in grasses is sensitive to these herbicides whereas the dicot ACCase is inherently tolerant, providing selectivity✔️
All weed species regardless of their photosynthetic pathway
Weeds with deep root systems and high water use

Correct Answer Logic:

ACCase inhibitors (FOPs — aryloxyphenoxypropionates, and DIMs — cyclohexanediones) inhibit the first committed step in fatty acid synthesis. The ACCase enzyme in grass plastids is sensitive to these herbicides while dicot ACCase is insensitive (different isoform), providing inherent biochemical selectivity. They control grasses post-emergence without harming dicot crops or weeds.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3494

Question 54

Volatile oils are also known as 'Essential Oils' because:

They are essential for life
They possess the 'essence' or odor of the plant✔️
They are made of proteins
They never evaporate

Correct Answer Logic:

They are volatile in steam and provide the characteristic aroma of the plant.

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General Knowledge QUESTION #169

Question 55

Which article of Pakistan's constitution talks about a clean environment?

Article 8A
Article 9A
Article 7A
None of these✔️

Correct Answer Logic:

While the right to a clean environment is read into Article 9 (Right to Life), there is no specific Article 9A/8A/7A.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3413

Question 56

A 'Buffer' is a substance that:

Increases the $pH$ of a solution
Decreases the $pH$ of a solution
Resists changes in $pH$✔️
Cleans the blood

Correct Answer Logic:

Buffers (like Bicarbonate) absorb or release $H^+$ ions to maintain stability.

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Reading and Writing (Module-1) QUESTION #5374

Question 57

A lesson from the 2003 Human Genome Project is that genes are influenced by many things, including their interactions with proteins. ______ researchers have now begun to study the human 'proteome' (the full set of proteins) rather than just looking at the genome alone. Which choice completes the text with the most logical transition?

In other words,
That said,
For example,
Accordingly,✔️

Correct Answer Logic:

'Accordingly' (therefore) shows that the shift in research focus is a logical response to the discovery mentioned.

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Security Measures to Maintain Law and Order QUESTION #921

Question 58

In security terms, what does 'situational awareness' involve?

Knowing the employee handbook
Being alert to one's environment✔️
Focusing only on assigned tasks
Following the daily schedule

Correct Answer Logic:

It requires constant monitoring of the environment to detect anomalies or potential security threats early.

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Commerce QUESTION #1194

Question 59

The purpose of reversing entries is:

To correct errors in the trial balance
To simplify recording certain transactions in the next period✔️
To adjust financial statements
To close permanent accounts

Correct Answer Logic:

Reversing entries are optional entries made at the beginning of the new accounting period to reverse certain adjusting entries (typically accruals). Their purpose is to simplify the recording of related transactions in the next period — for example, reversing an accrued salary entry so the next payroll can be recorded normally without splitting amounts.

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Statistics QUESTION #1972

Question 60

In hypothesis testing, the probability of committing a Type-I error (rejecting a true null hypothesis) is denoted by:

$\beta$
$\alpha$✔️
$1 - \beta$
$1 - \alpha$

Correct Answer Logic:

Type-I error $(\alpha)$ is the probability of rejecting $H_0$ when it is actually true (false positive). Type-II error $(\beta)$ is the probability of failing to reject $H_0$ when it is false.

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