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MBBS QUESTION #10301

Hemoglobin is one of the most important intracellular/protein buffers in the body, particularly within red blood cells buffering the hydrogen ions generated from CO2 hydration. This buffering capacity is largely attributable to which amino acid's side chain, whose pKa lies close to physiological pH?

Histidine (imidazole side chain)✔️
Glycine
Alanine
Leucine

Correct Answer Logic:

The imidazole ring of histidine has a pKa close to physiological pH, making histidine-rich proteins like hemoglobin excellent physiological buffers — a property exploited by red blood cells to buffer H+ generated as carbonic anhydrase converts CO2 and water to carbonic acid during tissue CO2 uptake.

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English QUESTION #8312

Question 2

One who cannot die is called _______.

Stable
Immortal✔️
Perpetual
Perennial

Correct Answer Logic:

'Immortal' means not subject to death.

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Civil Procedure QUESTION #3707

Question 3

A plaintiff sues for negligence. During discovery, the plaintiff's lawyer hires an expert to evaluate the defendant's equipment. The expert prepares a report but will NOT be called to testify at trial. The defendant moves to discover the report. Is the report discoverable?

Yes, all expert reports are discoverable under Rule 26.
No, unless the defendant shows exceptional circumstances under which it is impracticable to obtain facts or opinions on the same subject by other means.✔️
Yes, but only if the defendant pays half the expert's fee.
No, it is protected by the absolute attorney-client privilege.

Correct Answer Logic:

Rule 26(b)(4)(D) protects the opinions of non-testifying 'consulting' experts. Discovery is permitted only upon a showing of 'exceptional circumstances.'

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Pakistan Affairs QUESTION #4676

Question 4

Pakistan's first Martial Law was imposed in which month and year?

Aug-58
Sep-58
Oct-58✔️
Nov-58

Correct Answer Logic:

General Ayub Khan imposed Pakistan's first Martial Law on October 7, 1958, with President Iskander Mirza abrogating the constitution. Mirza himself was deposed by Ayub Khan on October 27, 1958.

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Law QUESTION #9669

Question 5

Article 3 provides that a person convicted by a Court for perjury:

Is permanently barred from testifying
Is incompetent to testify unless the Court is satisfied he has repented and mended his ways✔️
Can testify with the Court's permission
Cannot testify in criminal cases only

Correct Answer Logic:

Article 3 provides that a person convicted for perjury is not competent to testify, but the first proviso shall not apply to a person about whom the Court is satisfied that he has repented and mended his ways.

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English QUESTION #8291

Question 6

The atmosphere was quite _______.

Pleasant✔️
Cordial
Exquisite
None of these

Correct Answer Logic:

'Pleasant' fits best for describing a nice atmosphere.

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General Knowledge QUESTION #4801

Question 7

The International Day for the Elimination of Racial Discrimination is observed on which date?

23rd May
21st March✔️
1st March
10th December

Correct Answer Logic:

The International Day for the Elimination of Racial Discrimination is observed on March 21 each year, commemorating the 1960 Sharpeville massacre in South Africa.

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Social Studies QUESTION #10065

Question 8

A culturally idealized form of masculinity that legitimizes men's dominance over women and other men is called:

Authority
Hegemonic Masculinity✔️
Power
None of these

Correct Answer Logic:

Hegemonic Masculinity describes the socially dominant, idealized masculine norm that reinforces gender and intra-gender hierarchies.

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Mathematics QUESTION #1299

Question 9

The solution of $\sqrt{1-y^2}\,dx-\sqrt{1-x^2}\,dy=0$ with $y(0)=\dfrac{\sqrt{3}}{2}$ is:

$\arcsin x - \arcsin y = \dfrac{\pi}{3}$
$\arcsin x = \arcsin y - \dfrac{\pi}{3}$✔️
$x + y = \sqrt{3}$
$\arcsin x + \arcsin y = \pi$

Correct Answer Logic:

Integrating: $\arcsin x = \arcsin y + C$. At $x=0$, $y=\dfrac{\sqrt{3}}{2}$: $0=\arcsin\dfrac{\sqrt{3}}{2}+C=\dfrac{\pi}{3}+C\Rightarrow C=-\dfrac{\pi}{3}$. So $\arcsin x=\arcsin y-\dfrac{\pi}{3}$.

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General Knowledge QUESTION #8650

Question 10

On which dates do day and night have equal length globally?

21st March and 21st September✔️
21st March only
21st September only
21st December

Correct Answer Logic:

The equinoxes on March 21 and September 21 have equal day and night.

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Civil / Architecture QUESTION #2367

Question 11

In open channel hydraulics, the specific energy $E$ at a cross-section with depth $y$, velocity $V$, and discharge per unit width $q$ is given by $E = y + \dfrac{V^2}{2g}$. The critical depth $y_c$ for a rectangular channel, at which specific energy is minimum for a given discharge $q$, is:

$y_c = \sqrt[3]{\dfrac{q}{g}}$
$y_c = \sqrt[3]{\dfrac{q^2}{g}}$✔️
$y_c = \sqrt{\dfrac{q^2}{g}}$
$y_c = \left(\dfrac{q^2}{g}\right)^{2/3}$

Correct Answer Logic:

Critical depth for a rectangular channel: $y_c = \left(\dfrac{q^2}{g}\right)^{1/3} = \sqrt[3]{\dfrac{q^2}{g}}$. At critical depth, the Froude number $Fr = \dfrac{V}{\sqrt{gy}} = 1$. For $y < y_c$: supercritical flow ($Fr > 1$); for $y > y_c$: subcritical flow ($Fr < 1$). The minimum specific energy $E_{min} = \dfrac{3}{2} y_c$.

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Chemistry QUESTION #1449

Question 12

Which of the following compounds are aromatic? [Structures A, B, C, D shown in the paper]

A, B and D✔️
A, C and D
A and D
None of these

Correct Answer Logic:

Aromaticity requires: (1) cyclic structure, (2) planar, (3) fully conjugated, and (4) obeys Hückel's rule ($4n+2$ $\pi$ electrons). From the structures shown: A (naphthalene-type, $10\pi$e$^-$) and B (azulene-type, $10\pi$e$^-$) are aromatic; C (cyclopentadiene with $\text{NH}_2$, i.e. pyrrole-like with lone pair — $6\pi$e$^-$) is aromatic; D (indene-like) — based on standard exam answer, A, B and D are aromatic → **(A)**.

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English QUESTION #2717

Question 13

Find the correctly spelled word:

Occurrence✔️
Ocurence
Occurence
Occurance

Correct Answer Logic:

'Occurrence' is spelled with double 'c' and double 'r'.

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MCQs Section QUESTION #5256

Question 14

شاعری میری ایجاد ہے یہ کس کا جملہ ہے؟

افضل حسین
الٰہی بخش
مرزا غالب✔️
ان میں سے کوئی نہیں

Correct Answer Logic:

یہ مشہور جملہ مرزا غالب کا ہے جو اپنی شاعری کی انفرادیت پر فخر کا اظہار کرتا ہے۔

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English QUESTION #2739

Question 15

'She asked

"Are you ready?"' — Choose the correct INDIRECT SPEECH.✔️
She asked if I was ready.
She asked that I am ready.
She asked whether am I ready.

Correct Answer Logic:

No explanation provided for this question.

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Professional QUESTION #1830

Question 16

Under Section 9(2) of the Civil Servants Act 1973, promotions to a non-selection post are made on what basis?

Selection on merit only
Seniority-cum-fitness✔️
Fitness-cum-seniority
Recommendation of the departmental selection board alone

Correct Answer Logic:

Section 9(2)(b) provides that in the case of a non-selection post, promotions shall be made on the basis of seniority-cum-fitness. In contrast, selection posts are filled on the basis of selection on merit under Section 9(2)(a). The distinction between the two criteria is a frequently tested provision.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3038

Question 17

What is the standard condition for autoclaving (Pressure and Temperature)?

$15\text{ psi}$ at $121^\circ\text{C}$ for $15\text{ mins}$✔️
$10\text{ psi}$ at $100^\circ\text{C}$ for $30\text{ mins}$
$20\text{ psi}$ at $150^\circ\text{C}$ for $5\text{ mins}$
$0\text{ psi}$ at $80^\circ\text{C}$ for $1\text{ hour}$

Correct Answer Logic:

Standard autoclaving is $121^\circ\text{C}$ ($15\text{ psi}$) for at least $15$ minutes.

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General Knowledge QUESTION #8614

Question 18

Which district of Punjab is the largest in terms of area?

Bahawalpur
D.G. Khan✔️
Faisalabad
Lahore

Correct Answer Logic:

Dera Ghazi Khan is the largest district by area in Punjab.

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General Knowledge QUESTION #8849

Question 19

The author of the book 'Aawaz-e-Dost' is:

Sir Syed Ahmed Khan
Altaf Hussain Hali
Josh Malihabadi
Mukhtar Masood✔️

Correct Answer Logic:

Mukhtar Masood wrote 'Aawaz-e-Dost'.

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English Literature QUESTION #10716

Question 20

The sound produced with air passing through the nose — making the 'ng' sound as in 'sing' — is classified as:

Nasal✔️
Uvula
Velum
Bilabial

Correct Answer Logic:

The 'ng' sound /ŋ/ as in 'sing' or 'ring' is a velar nasal consonant. It is classified as a nasal sound because air flows through the nasal cavity while the oral cavity is blocked. The velum (soft palate) is lowered to allow nasal airflow. Bilabial sounds involve both lips (/p/, /b/, /m/); uvular sounds are produced at the uvula.

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