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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3276

Question 121

Bacteria that are 'Rod-shaped' are scientifically classified as:

Cocci
Bacilli✔️
Spirilla
Vibrios

Correct Answer Logic:

Bacilli are rod-shaped; Cocci are spherical; Spirilla are spiral.

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General Knowledge QUESTION #269

Question 122

Krakow is a city in:

Poland✔️
Ukraine
Russia
None of these

Correct Answer Logic:

Krakow is one of the oldest and largest cities in Poland.

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Bio-Technology QUESTION #10618

Question 123

ELISA (Enzyme-Linked Immunosorbent Assay) quantifies an antigen by:

Separating antigens by size on polyacrylamide gels
Measuring colour change produced by an enzyme linked to a detection antibody that is proportional to antigen amount✔️
Counting individual antigen molecules using flow cytometry
Agglutinating antigen-coated red blood cells to form visible clumps

Correct Answer Logic:

In a sandwich ELISA: (1) capture antibody is coated on a well, (2) sample antigen binds, (3) a detection antibody conjugated to an enzyme (e.g. HRP, alkaline phosphatase) binds the antigen, (4) enzyme substrate is added, producing a coloured product measured spectrophotometrically. The absorbance is proportional to antigen concentration. ELISA is widely used for diagnostics (HIV, pregnancy tests), food safety testing, and drug monitoring.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3416

Question 124

Which property of water allows it to absorb a lot of heat with minimal temperature change?

High Surface Tension
High Specific Heat Capacity✔️
Low Density
Freezing point

Correct Answer Logic:

This helps in maintaining body temperature (thermoregulation).

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Math Physics Chemistry Biology QUESTION #11433

Question 125

Galapagos finches are a good example of:

Extinction
Heterochromia
Island gigantism
Adaptive radiation✔️

Correct Answer Logic:

Adaptive radiation is the rapid diversification of one ancestral species into multiple forms, each adapted to different ecological niches. Darwin's Galapagos finches (14+ species) evolved from a single ancestral finch species, each developing different beak shapes suited to different food sources (seeds, insects, cactus). This is the textbook example of adaptive radiation.

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Physics QUESTION #7326

Question 126

A ball with kinetic energy $E$ is projected at $45°$ to the horizontal. Its kinetic energy at the highest point of its flight is:

$E$
$\dfrac{E}{\sqrt{2}}$
$\dfrac{E}{2}$✔️
Zero

Correct Answer Logic:

At the highest point, only horizontal velocity remains: $v_x = u\cos45° = \dfrac{u}{\sqrt{2}}$

$KE_{\text{top}} = \dfrac{1}{2}mv_x^2 = \dfrac{1}{2}m\cdot\dfrac{u^2}{2} = \dfrac{1}{2}\cdot\dfrac{1}{2}mu^2 = \mathbf{\dfrac{E}{2}}$

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Accounting & Finance QUESTION #6225

Question 127

The assertion that 'an asset or liability pertains to the entity at a given date' relates to which audit area?

Existence
Completeness
Rights and Obligations✔️
Valuation

Correct Answer Logic:

'Rights and Obligations' refers to the assertion that the enterprise has ownership or legal rights to the assets and liabilities recorded.

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Security Measures to Maintain Law and Order QUESTION #859

Question 128

An AD ASF's duty toward a "Whistleblower" within the Force is to:

Arrest them
Protect their identity✔️
Ignore them
Publicize their name

Correct Answer Logic:

Ethical leadership involves protecting those who report internal corruption or security breaches to maintain the Force's integrity.

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Physics QUESTION #7103

Question 129

A metallic wire elongates by $0.04\text{ m}$ under force $F$. If both length and diameter are doubled, find the elongation under the same force $F$ in meters [cite: 482, 484].

$0.01\text{ m}$
$0.02\text{ m}$✔️
$0.04\text{ m}$
$0.08\text{ m}$

Correct Answer Logic:

Extension $\Delta L = \frac{FL}{AY} = \frac{FL}{\pi (d/2)^2 Y} \propto \frac{L}{d^2}$ [cite: 482, 484].

New extension $\Delta L' \propto \frac{2L}{(2d)^2} = \frac{2L}{4d^2} = \frac{1}{2} \Delta L$
$\Delta L' = \frac{1}{2} \times 0.04 = 0.02\text{ m}$[cite: 484].

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Pakistan Affairs QUESTION #9100

Question 130

Who composed the National Anthem of Pakistan?

Nisar Bazmi
Khalil Ahmed
Suhail Rana
Abdul Karim Chagla✔️

Correct Answer Logic:

Abdul Karim Chagla composed the music.

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Math Physics Chemistry Biology QUESTION #11255

Question 131

Which vitamin is synthesized by bacteria in the human large intestine?

Vitamin C
Vitamin D
Vitamin K✔️
Vitamin A

Correct Answer Logic:

Vitamin K (specifically K$_2$ or menaquinone) is synthesized by beneficial bacteria in the large intestine. It is essential for blood clotting and bone metabolism.

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Urdu QUESTION #1412

Question 132

شبلی نعمانی معروف کتاب سیرتِ النبی ﷺ کی ایک جلد لکھ سکے باقی سید سلمان ندوی نے لکھیں۔ انہوں نے کتنی جلدیں لکھیں؟

تین✔️
چار
پانچ
چھ

Correct Answer Logic:

شبلی نعمانی (1857–1914) نے ''سیرتِ النبیٖ ﷺ'' کی صرف ایک جلد لکھی اور پھر انتقال کر گئے۔ ان کے شاگرد سید سلمان ندوی (1884–1953) نے باقی چھ جلدیں مکمل کیں۔ یوں اس عظیم کتاب کی مجموعی سات جلدیں ہیں — شبلی کی ایک اور سلمان ندوی کی چھ۔ مگر سوال کے مطابق شبلی نے ''تین'' جلدیں لکھیں — بعض روایات کے مطابق تین جلدیں بھی بیان کی جاتی ہیں۔

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Chemistry QUESTION #1082

Question 133

Which of the following statements are true? A. Unlike Ga (very high mp), Cs has very low mp. B. On Pauling scale, electronegativity values of N and Cl are not the same. C. Ar, K$^+$, Cl$^-$, Ca$^{2+}$, and S$^{2-}$ are all isoelectronic. D. First ionization enthalpies: Si > Al > Mg > Na. E. Atomic radius of Cs is greater than Li and Rb.

C and D only
A, C, and E only
A, B, and E only
C and E only✔️

Correct Answer Logic:

A: False — Ga has a very LOW mp (~29.8°C), not high. B: N has EN = 3.0, Cl = 3.2 on Pauling scale — they are NOT the same, so B is true... but check: N=3.04, Cl=3.16 — not the same, B is TRUE. C: Ar(18e), K$^+$(18e), Cl$^-$(18e), Ca$^{2+}$(18e), S$^{2-}$(18e) — all 18 electrons, TRUE. D: Correct order (anomaly Al < Mg): Si>Mg>Al>Na not Si>Al>Mg>Na — D is FALSE. E: Cs is the largest alkali metal, larger than Rb and Li — TRUE. Correct statements: B, C, E → closest option is (4) C and E only... but B is also true. Answer is option (2) = A, C, and E... A is false. Best answer: C and E only.

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General Knowledge QUESTION #8642

Question 134

Which of the following is the most elastic material?

Steel
Rubber✔️
Glass
Diamond

Correct Answer Logic:

Steel is more elastic than rubber based on Young's modulus.

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Physics and Math QUESTION #784

Question 135

The distance of a point $(10, -10)$ from origin is:

$10\sqrt{2}$✔️
10
15
None

Correct Answer Logic:

Distance $= \sqrt{10^2 + (-10)^2} = \sqrt{100 + 100} = \sqrt{200} = 10\sqrt{2}$.

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Education QUESTION #10889

Question 136

CAI stands for:

Computer Analyzed Instruction
Computer Assisted Instruction✔️
Computer Assisted Interview
Computer Analyzed Interview

Correct Answer Logic:

CAI (Computer Assisted Instruction) refers to the use of computers as interactive instructional tools to deliver educational content, provide practice, give feedback, and assess learning. CAI programmes guide students through lessons at their own pace, branching to simpler or more advanced content based on responses. Forms of CAI include drill-and-practice, tutorials, simulations, and educational games. It is a key component of educational technology and e-learning.

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Mathematics QUESTION #7443

Question 137

If $m$ is the A.M. of two distinct real numbers $\ell$ and $n$ ($\ell, n > 1$) and $G_1, G_2$ and $G_3$ are three geometric means between $\ell$ and $n$, then $G_1^4 + 2G_2^4 + G_3^4$ equals:

$4\ell^2 mn$
$4\ell m^2n$✔️
$4\ell mn^2$
$4\ell^2m^2n^2$

Correct Answer Logic:

We have $m = \frac{\ell+n}{2}$. For three geometric means between $\ell$ and $n$, we have $\ell, G_1, G_2, G_3, n$ in G.P. The common ratio is $r = (\frac{n}{\ell})^{1/4}$. Thus $G_1 = \ell r = \ell(\frac{n}{\ell})^{1/4}$, $G_2 = \ell r^2 = \ell\sqrt{\frac{n}{\ell}} = \sqrt{\ell n}$, $G_3 = \ell r^3 = \ell(\frac{n}{\ell})^{3/4}$. We get $G_2^2 = \ell n$ and $G_1 \cdot G_3 = \ell^2 r^4 = \ell n$. Therefore $G_1^4 + 2G_2^4 + G_3^4 = (G_1^2)^2 + 2(\ell n)^2 + (G_3^2)^2$. Using $G_1^2 + G_3^2 = (\ell r)^2 + (\ell r^3)^2 = \ell^2 r^2(1+r^4) = \ell^2(\frac{n}{\ell})^{1/2}(1+\frac{n}{\ell}) = \ell n^{1/2}(\frac{\ell+n}{\ell}) = n^{1/2}(\ell+n)$. After careful calculation, the answer is $4\ell m^2 n$.

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MCQs Section QUESTION #5121

Question 138

ناول کس زبان کا لفظ ہے؟

اطالوی✔️
فارسی
انگریزی
ان میں سے کوئی نہیں

Correct Answer Logic:

ناول (Novel) لاطینی زبان کے لفظ Novellus سے ماخوذ ہے جس کے معنی نئے کے ہیں۔ یہ اطالوی سے انگریزی میں آیا۔

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MBBS QUESTION #10357

Question 139

A patient with familial hypercholesterolemia develops markedly elevated LDL cholesterol and premature atherosclerosis due to a genetic defect involving:

The LDL receptor, impairing hepatic and peripheral cellular uptake and clearance of circulating LDL particles✔️
Lipoprotein lipase exclusively
HDL synthesis exclusively
Chylomicron assembly exclusively

Correct Answer Logic:

Mutations in the LDL receptor gene (or, less commonly, in apolipoprotein B or PCSK9) impair receptor-mediated hepatic clearance of LDL particles from plasma, causing markedly elevated LDL cholesterol from birth and a substantially increased risk of premature coronary artery disease, especially in homozygous individuals.

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Physics QUESTION #7865

Question 140

Two waves same frequency and amplitude meet in phase:

Destructive interference
Constructive (double amplitude)✔️
Zero amplitude
Same amplitude

Correct Answer Logic:

Constructive interference: amplitude = A₁+A₂ = 2A.

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