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Math Physics Chemistry Biology QUESTION #7780

Lysosomes contain which type of enzymes?

Hydrolytic enzymes✔️
Meiotic enzymes
Oxidative enzymes
Mitotic enzymes

Correct Answer Logic:

Lysosomes are membrane-bound organelles containing acid hydrolases (hydrolytic enzymes) that digest macromolecules. Oxidative enzymes are in peroxisomes; meiotic/mitotic enzymes are involved in cell division.

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Physics QUESTION #7869

Question 2

Police car moving towards stationary listener: received frequency:

Decreases
Increases✔️
Stays same
Varies randomly

Correct Answer Logic:

Doppler effect: source towards listener → frequency increases.

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General Knowledge QUESTION #4739

Question 3

The Nobel Peace Prize for 2006 was awarded to which person?

Dr. Mahathir Mohammad
Dr. Muhammad Yunus✔️
Dr. Abdul Kalam
Dr. Mohamed ElBaradei

Correct Answer Logic:

Dr. Muhammad Yunus of Bangladesh, along with the Grameen Bank he founded, was awarded the 2006 Nobel Peace Prize for their efforts to create economic and social development through microcredit.

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Education QUESTION #7609

Question 4

The development of manual skills and physical coordination in learners is focused on which domain?

Cognitive domain
Affective domain
Psychomotor domain✔️
None of these

Correct Answer Logic:

The psychomotor domain involves physical movement, coordination, and use of motor skills, including manual dexterity and hands-on abilities.

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Civil Engineering QUESTION #2122

Question 5

The water-cement ratio in concrete mix design primarily governs:

The workability and unit weight of fresh concrete only
Both the compressive strength (inversely — lower w/c gives higher strength per Abrams' law) and durability (lower w/c reduces permeability, carbonation, and chloride ingress) — it is the single most important parameter in concrete mix design✔️
Only the setting time and heat of hydration
The aggregate-cement ratio and hence the modulus of elasticity

Correct Answer Logic:

Abrams' law: $f_c = \dfrac{K_1}{K_2^{w/c}}$. Strength decreases as w/c increases because excess water creates capillary pores on evaporation. Durability also decreases with higher w/c as the pore structure becomes more interconnected, allowing aggressive agents to penetrate. Maximum w/c ratios are specified in codes (e.g., 0.45 for moderate exposure in IS 456) — it governs both structural performance and service life.

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Chemistry QUESTION #7390

Question 6

For the electron affinity (EA) of halogens, which order is correct?

$\text{Br} > \text{F}$
$\text{F} > \text{Cl}$
$\text{Br} > \text{Cl}$
$\text{F} > \text{I}$✔️

Correct Answer Logic:

Electron affinity trend in halogens:
Expected trend: EA increases up the group (smaller atom = stronger attraction for incoming electron). However, F is an exception — its very small size causes high electron–electron repulsion in the compact 2p subshell, reducing its EA.

Actual order: Cl > F > Br > I

$\text{F} > \text{I}$ is correct ✓. The correct option here is (4): F > I.

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Electrical Engineering QUESTION #2165

Question 7

For a uniform plane wave in free space with $|\vec{E}| = 100\,\text{V/m}$, the average Poynting power density is:

$13.3\,\text{W/m}^2$✔️
$26.5\,\text{W/m}^2$
$53\,\text{W/m}^2$
$100\,\text{W/m}^2$

Correct Answer Logic:

$S_{avg} = \frac{|E|^2}{2\eta_0} = \frac{(100)^2}{2 \times 377} = \frac{10000}{754} \approx 13.3\,\text{W/m}^2$, where $\eta_0 = 377\,\Omega$.

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The Constitution of Pakistan QUESTION #9363

Question 8

Under Article 63A(3)-(4), after the Presiding Officer refers a defection declaration to the Chief Election Commissioner, within how many days must the Election Commission decide?

Fifteen days
Thirty days✔️
Sixty days
Ninety days

Correct Answer Logic:

Article 63A(3) requires the Presiding Officer to refer within two days (deemed referred if not done). The Chief Election Commissioner then places it before the Election Commission which must decide within 30 days. An appeal against the Election Commission's decision lies to the Federal Constitutional Court, which decides within 90 days.

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General Knowledge QUESTION #4471

Question 9

_____ is the author of “Essay on Population (1798)”.

Thomas Malthus✔️
Ester Boserup
Garret Hardin
None of these

Correct Answer Logic:

Thomas Malthus authored 'An Essay on the Principle of Population' in 1798.

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Physics QUESTION #1167

Question 10

What is NOT the condition for equilibrium in a three-dimensional system?

$\sum F_x = 0$
$\sum F_y = 0$
$\sum F_z = 0$
$\sum F \neq 0$✔️

Correct Answer Logic:

For a body to be in equilibrium in three dimensions, the net force in every direction must be zero: $\sum F_x = 0$, $\sum F_y = 0$, and $\sum F_z = 0$. The condition $\sum F \neq 0$ violates equilibrium (it means there is a net unbalanced force), so it is NOT a condition for equilibrium.

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Math Physics Chemistry Biology QUESTION #4272

Question 11

Nissl's granule is a specialized structure in a neuron formed by modification of:

Golgi bodies & Smooth ER
Peroxisome & Mitochondria
Lysosome & Vacuole
Ribosome & Rough ER✔️

Correct Answer Logic:

Nissl granules are found in neurons and are formed from rough endoplasmic reticulum (RER) and ribosomes. They are involved in active protein synthesis.

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Chemistry QUESTION #1097

Question 12

Dalton's Atomic theory could NOT explain which of the following?

Law of multiple proportion
Law of gaseous volume✔️
Law of conservation of mass
Law of constant proportion

Correct Answer Logic:

Dalton's Atomic theory successfully explained: Law of conservation of mass, Law of constant proportion, and Law of multiple proportions. It could NOT explain Gay-Lussac's Law of Gaseous Volumes (Law of combining volumes) because Dalton's theory did not account for the concept of molecules vs atoms in gases.

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Tourism & Hospitality Management QUESTION #1588

Question 13

According to the Introduction to Tourism & Hospitality course, Customer Relationship Management (CRM) in hotels is most directly associated with which aspect of hotel operations?

The physical maintenance of hotel buildings
Managing and enhancing long-term relationships between the hotel and its guests to build loyalty✔️
The legal compliance requirements of hotel ownership
The food and beverage procurement process

Correct Answer Logic:

The curriculum covers CRM (Customer Relationship Management) as part of the Hotel Development Process, specifically in the context of managing relationships with guests to improve satisfaction, build loyalty, and enhance repeat business — a strategic hospitality management function.

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CISA QUESTION #6843

Question 14

An organization implements multi-factor authentication but configures it to require only username/password during business hours, with the second factor required only for after-hours access. What is the PRIMARY security weakness?

Inconsistent user experience
Reduced security protection during the highest-risk period when most users are active✔️
Complicated configuration
Increased support costs

Correct Answer Logic:

Most attacks occur during business hours when users are active and system activity can blend with normal operations. Requiring MFA only after-hours protects the lower-risk period while leaving the higher-risk business hours protected by only single-factor authentication. The security is inverted from risk-based design.

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Boilers Mechanical Engineering QUESTION #2539

Question 15

Two forces of equal magnitude $F=50$ N act in opposite directions with perpendicular separation $d=0.4$ m forming a couple. Its moment about ANY point in the plane is:

$20$ N·m — same about every point✔️
$20$ N·m — only about the midpoint
Depends on the chosen reference point
Zero since the net force is zero

Correct Answer Logic:

A couple has a moment $M=F\cdot d=50\times0.4=20$ N·m. The defining property of a couple is that its moment is identical about every point in space, making the couple a free vector.

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5758

Question 16

Which drug is used as a 'prophylactic' agent for motion sickness during short journeys?

Atropine✔️
Prazosin
Propranolol
Cimetidine

Correct Answer Logic:

Atropine (or related antimuscarinics) is effective for preventing motion sickness.

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Civil / Architecture QUESTION #2348

Question 17

In RC beam shear design per ACI 318 (simplified), the nominal concrete shear strength $V_c$ for a rectangular beam with $f'_c$ in MPa, $b_w$ in mm, and $d$ in mm is:

$V_c = 0.33 \lambda \sqrt{f'_c} \cdot b_w \cdot d$ (N)
$V_c = 0.17 \lambda \sqrt{f'_c} \cdot b_w \cdot d$ (N)✔️
$V_c = 0.17 \lambda f'_c \cdot b_w \cdot d$ (N)
$V_c = \lambda \sqrt{f'_c} \cdot b_w \cdot d$ (N)

Correct Answer Logic:

Per ACI 318 simplified equation: $V_c = 0.17\lambda\sqrt{f'_c} \cdot b_w \cdot d$ (in Newtons, SI units). For normal weight concrete $\lambda = 1.0$. The more detailed equation also accounts for $N_u$, reinforcement ratio, and moment. The factor 0.33 applies in the more conservative detailed method for certain conditions.

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Ability / HR / Governance / Special Education QUESTION #1798

Question 18

Rule 42(b) on 'request for quotations' requires a minimum of how many quotations, and from which category of firms?

Two quotations from any registered firms
Three quotations from GST registered firms, original equipment manufacturers or authorized dealers✔️
Four quotations from SECP registered companies
Three quotations from any suppliers regardless of registration

Correct Answer Logic:

Rule 42(b)(i) and (iii) together require that at least three quotations be obtained from GST registered firms, original equipment manufacturers, or authorized dealers when procurement value exceeds PKR 100,000 but does not exceed PKR 500,000.

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