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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3460

Question 9581

Which vitamin contains 'Cobalt' in its structure?

Vitamin B1
Vitamin B6
Vitamin B12✔️
Folic Acid

Correct Answer Logic:

B12 is also known as Cyanocobalamin.

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CISA QUESTION #1744

Question 9582

The Software Engineering Institute's Capability Maturity Model (CMM) is most accurately described as which of the following?

A measure of resources needed to reduce coding defects
A record of achievements made during program development
A comparison of application performance against user requirements
A reference point for tracking current process progress or regression✔️

Correct Answer Logic:

The CMM serves as a baseline reference to chart current progress or regression in process maturity. It provides a structured guideline for improving the maturity of systems and management procedures, starting from no defined process and advancing through five levels of documentation and controls.

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Boilers Mechanical Engineering QUESTION #2391

Question 9583

The Laplace transform of a unit step function $u(t)$ is:

$\mathcal{L}\{u(t)\} = 1$
$\mathcal{L}\{u(t)\} = 1/s$✔️
$\mathcal{L}\{u(t)\} = 1/s^2$
$\mathcal{L}\{u(t)\} = s$

Correct Answer Logic:

The Laplace transform of the unit step function: $\mathcal{L}\{u(t)\}=\int_0^\infty e^{-st}dt=1/s$. The ramp $tu(t)$ has transform $1/s^2$; the impulse $\delta(t)$ has transform 1.

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MBBS QUESTION #10306

Question 9584

A breastfed neonate develops vomiting, jaundice, hepatomegaly, and reducing substances in the urine shortly after birth. This presentation, classic for severe (classic) galactosemia, most commonly results from deficiency of:

Galactokinase
Galactose-1-phosphate uridyltransferase (GALT)✔️
UDP-glucose 4-epimerase
Lactase

Correct Answer Logic:

GALT deficiency causes classic galactosemia, with toxic accumulation of galactose-1-phosphate causing liver, kidney, and brain damage if untreated; galactokinase deficiency instead causes a much milder form limited mainly to cataract formation, without the severe hepatic and systemic toxicity.

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Information Technology QUESTION #1112

Question 9585

What is the degree of leaf node in a tree?

1
2
None of these

Correct Answer Logic:

In graph theory and tree data structures, a leaf node is defined as a node that has no children. Therefore, its out-degree (number of children) is 0.

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CISA QUESTION #6831

Question 9586

An IS auditor evaluates encryption implementation and finds that data at rest is encrypted using AES-256, but encryption keys are stored on the same server in a plaintext configuration file. What is the MOST critical finding?

Weak encryption algorithm
Ineffective key management negates encryption protection✔️
Poor documentation
Insufficient key length

Correct Answer Logic:

Encryption is only as strong as key management. Storing encryption keys in plaintext on the same system as encrypted data provides no real protection—an attacker who gains access to the encrypted data can immediately access the keys. This represents a fundamental failure in cryptographic implementation.

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Boilers Mechanical Engineering QUESTION #2531

Question 9587

For a particle moving in a circular path of radius $R$ with constant speed $v$, the magnitude of total acceleration is:

$\frac{v^2}{R}$ directed toward the center✔️
$\frac{v}{R}$ tangentially
$\dot{v}$ only
$\sqrt{\dot{v}^2 + (v^2/R)^2}$ — always larger than $v^2/R$

Correct Answer Logic:

For constant speed circular motion, $\dot{v}=0$, so the tangential acceleration is zero. Only the normal (centripetal) acceleration exists: $a_n=v^2/R$, directed toward the center.

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General Knowledge QUESTION #4753

Question 9588

May 3 is annually observed worldwide as which international day?

World Environment Day
Human Rights Day
World Press Freedom Day✔️
World Health Day

Correct Answer Logic:

May 3 is observed globally as World Press Freedom Day, declared by the UN General Assembly in 1993, to evaluate press freedom worldwide.

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Agriculture Economics QUESTION #11875

Question 9589

An isoquant represents:

All combinations of two inputs yielding equal cost
All combinations of two inputs yielding the same level of output✔️
The maximum output attainable from any input combination
A firm's total revenue at various output levels

Correct Answer Logic:

An isoquant maps all input combinations that produce an identical quantity of output.

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Physics QUESTION #7101

Question 9590

A soft sphere of radius $r$ and bulk modulus $K$ is in a liquid. If a mass $m$ is placed on a piston of area $a$ to compress the liquid, find the fractional decrease in radius ($\frac{dr}{r}$) [cite: 461, 462, 463, 465].

$\frac{mg}{3Ka}$✔️
$\frac{mg}{Ka}$
$\frac{Ka}{mg}$
$\frac{3Ka}{mg}$

Correct Answer Logic:

Bulk modulus is $K = \frac{\Delta P}{\Delta V / V}$ [cite: 461].

$\Delta P = \frac{mg}{a}$ (pressure from piston) [cite: 462, 463]
For a sphere, $V = \frac{4}{3}\pi r^3 \implies \frac{\Delta V}{V} = 3\frac{dr}{r}$
$K = \frac{mg/a}{3dr/r} \implies \frac{dr}{r} = \frac{mg}{3Ka}$[cite: 466].

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MCQs Section QUESTION #5027

Question 9591

ابلیس کی مجلسِ شوریٰ کس شاعر کی نظم ہے؟

ناصر کاظمی
مولانا ظفر علی خان
علامہ اقبال✔️
ان میں سے کوئی نہیں

Correct Answer Logic:

ابلیس کی مجلسِ شوریٰ علامہ اقبال کی مشہور فلسفیانہ نظم ہے جو ارمغانِ حجاز میں شامل ہے۔

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Math Physics Chemistry Biology QUESTION #11396

Question 9592

During photosynthesis, $CO_2$ works as:

Proton donor✔️
Electron donor
Proton acceptor
Electron acceptor

Correct Answer Logic:

In photosynthesis, $CO_2$ acts as a proton donor (hydrogen acceptor) in the Calvin cycle. $CO_2$ is fixed by RuBisCO and combined with hydrogen (from NADPH) to form glucose. In this reduction process, $CO_2$ receives protons (H⁺) and electrons from NADPH, being reduced to carbohydrate. So $CO_2$ is reduced — it accepts protons/electrons.

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Civil / Architecture QUESTION #2366

Question 9593

In the context of Green Building design, the Overall Thermal Transfer Value (OTTV) is a metric used to evaluate:

The amount of heat generated by building occupants and equipment per unit floor area
The total heat gain through the building envelope (walls, roofs, and fenestration) per unit area of the building facade, used to set energy performance benchmarks✔️
The coefficient of performance (COP) of the HVAC system
The total solar radiation incident on the building roof per year

Correct Answer Logic:

OTTV (Overall Thermal Transfer Value, in W/m²) is an energy code metric used in tropical and subtropical regions (including ECBC in Pakistan/India) that quantifies the total heat gain through the building envelope per unit external wall area. It accounts for conduction through opaque walls, solar radiation through windows (WWR, SHGC), and conductive heat through glazing. A lower OTTV indicates a more thermally efficient building envelope.

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MCQs Section QUESTION #5266

Question 9594

کون سی ضربِ مثل درست ہے؟

چیل کے گھر میں کہاں
چیل کے گھونسلے میں گوشت کہاں✔️
چیل کے گھونسلے میں ماس کہاں
چیل کے گھونسلے میں بلی کہاں

Correct Answer Logic:

صحیح ضربِ مثل ہے: 'چیل کے گھونسلے میں گوشت کہاں'۔

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Biology QUESTION #7264

Question 9595

In which one of the following do the male and female gametophytes not have a free-living, independent existence?

Polytrichum
Cedrus✔️
Pteris
Funaria

Correct Answer Logic:

In Cedrus (a gymnosperm), both male gametophyte (pollen grain) and female gametophyte (embryo sac/megagametophyte) are retained within the sporophyte — they are never free-living. In mosses (Polytrichum, Funaria) and ferns (Pteris), the gametophyte (prothallus or plant body) lives freely and independently.

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Mathematics QUESTION #4112

Question 9596

In $\mathbb{Z}_{18}$, what is the order of the cyclic subgroup generated by element $6$?

$2$
$3$✔️
$6$
$9$

Correct Answer Logic:

Order of $\langle 6 \rangle = \frac{18}{\gcd(6,18)} = \frac{18}{6} = 3$.

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Administration QUESTION #2941

Question 9597

In marketing, the process of "Market Segmentation" involves:

Selling the exact same product to every possible customer
Dividing a broad market into distinct groups based on shared characteristics✔️
Increasing the total price of products to maximize profit margins
None of these

Correct Answer Logic:

Segmentation allows businesses to target specific groups (demographic, geographic, etc.) with tailored marketing strategies.

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Chemistry QUESTION #449

Question 9598

The highest temperature a substance can exist as __________ is called its critical temperature.

Solid
Liquid✔️
Gas
Isotope

Correct Answer Logic:

Critical temperature is for liquid-gas transition

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Economics QUESTION #1690

Question 9599

Monopolistic competition structurally differs from perfect competition primarily because of one defining characteristic. Which of the following distinguishes monopolistic competition from perfect competition?

The presence of a large number of competing firms
The absence of significant barriers to entry and exit
The existence of product differentiation among competing firms✔️
The complete absence of price competition in the monopolistically competitive market

Correct Answer Logic:

The critical distinction is product differentiation. In perfect competition, products are homogeneous (identical); in monopolistic competition, each firm's product is slightly differentiated (by branding, quality, location, etc.), giving firms some degree of market power and a downward-sloping demand curve. Both market structures have many firms and relatively free entry/exit. Price competition exists in both, though it is less intense in monopolistic competition.

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Chemistry QUESTION #7181

Question 9600

A certain compound has a molecular mass of $180$. Upon acylation with $CH_{3}COCl$, its molecular mass increases to $390$. Determine the total number of amino groups present in each molecule of the original compound.

2
5✔️
4
6

Correct Answer Logic:

The change in molecular mass during acylation helps determine the number of functional groups.

Each acylation ($R-NH_{2} \rightarrow R-NHCOCH_{3}$) replaces one $H$ (mass 1) with an acetyl group $CH_{3}CO$ (mass 43).
Net mass increase per amino group = $43 - 1 = 42$ units.
Total mass increase = $390 - 180 = 210$ units.
Number of amino groups = $210 / 42 = 5$.

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