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A high-speed memory chip that stores temporary data
The body or circulatory system of the computer that connects all the pieces together✔️
The component that converts electricity from the wall into usable power for the computer
A type of storage device that holds music and documents

Correct Answer Logic:

The motherboard is the body or circulatory system of the computer that connects all the pieces together. Every major component — CPU, RAM, storage, ports — is connected through or to the motherboard.

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Biology Zoology Botany QUESTION #1391

Question 5

Which scientist is known for developing the concept of genetic drift?

Gregor Mendel
Sewall Wright✔️
Charles Darwin
Alfred Russel Wallace

Correct Answer Logic:

Sewall Wright (1889–1988) was the American geneticist and population biologist who developed and formalised the concept of genetic drift (also called the Sewall Wright effect). He showed that random fluctuations in allele frequencies in small populations can cause significant changes in gene frequency over time, independent of natural selection.

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Statistics QUESTION #1966

Question 6

The discrepancy between a computed sample statistic and the true population parameter is technically referred to as:

Sampling error✔️
Random error
Non-random error
Probability error

Correct Answer Logic:

Sampling error is the difference between a sample statistic and the true population parameter. It arises because only a subset of the population is observed.

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Biology QUESTION #4288

Question 7

Which is the common feature between cardiac and smooth muscles?

Voluntary
Involuntary✔️
Branched
Unbranched

Correct Answer Logic:

Both cardiac and smooth muscles are involuntary — they operate without conscious control, unlike skeletal muscle which is voluntary.

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MCQs Section QUESTION #4855

Question 8

Choose the word nearly opposite in meaning to "FACSIMILE"

Imitation
Model
Mutation✔️
Pattern

Correct Answer Logic:

A facsimile is an exact copy or reproduction of something. Its antonym is 'mutation,' which implies a change or alteration rather than an exact reproduction.

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General Abilities QUESTION #4586

Question 9

Solve proportion: $\frac{3}{x} = \frac{9}{27}$

$x = 9$✔️
$x = 3$
$x = 27$
$x = 81$

Correct Answer Logic:

Cross-multiply: $9x = 81$, so $x = 9$

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Physics QUESTION #1181

Question 10

The cyclotron is a device which is primarily used to:

Accelerate subatomic particles✔️
Generate electrons
Generate neutrons
Generate protons

Correct Answer Logic:

A cyclotron is a type of particle accelerator that uses a combination of a static magnetic field and an oscillating electric field (alternating voltage between Dees) to accelerate charged subatomic particles (protons, alpha particles, etc.) to high energies in a spiral path. Its primary purpose is particle acceleration, not generation.

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Physics QUESTION #1179

Question 11

Gauss's law is applicable to charges which are:

Closely distributed in space
Sparsely distributed in space
Enclosed by a broken surface
Enclosed by a closed surface✔️

Correct Answer Logic:

Gauss's law states that the total electric flux through a closed (Gaussian) surface is proportional to the total charge enclosed: $\oint \vec{E} \cdot d\vec{A} = \frac{Q_{\text{enc}}}{\varepsilon_0}$. The surface must be a closed surface — it cannot be a broken or open surface. The distribution of charges (close or sparse) does not affect the applicability of the law.

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Boilers Mechanical Engineering QUESTION #2468

Question 12

For Acme threads compared to square threads, which statement is CORRECT regarding power transmission efficiency?

Acme threads are more efficient due to their wedge-shaped tooth profile
Square threads are more efficient; Acme threads add extra friction due to wedging action of the thread angle $\alpha$✔️
Both have identical efficiency
Acme threads are self-locking; square threads are never self-locking

Correct Answer Logic:

Square threads are more efficient because the thread load is parallel to the screw axis. Acme threads require modifying friction terms by $\sec\alpha$, which increases friction and reduces efficiency.

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Geography QUESTION #6347

Question 13

The 'Brandt Line' historically divided:

Communist and capitalist countries during Cold War
Developed (Global North) and developing (Global South) countries✔️
Colonial powers and colonized territories
Democratic and authoritarian regimes

Correct Answer Logic:

The Brandt Line (1980 Brandt Report) roughly divided wealthy developed countries (Global North - above the line) from poorer developing countries (Global South - below the line) at approximately 30°N latitude, highlighting global economic inequality patterns.

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Physics QUESTION #4381

Question 14

The unit of temperature coefficient of resistivity is:

$\dfrac{1}{C}$
$\dfrac{1}{K}$✔️
$\dfrac{1}{A}$
$\dfrac{1}{\Omega}$

Correct Answer Logic:

Temperature coefficient of resistivity $\alpha$ is defined by $\rho = \rho_0(1 + \alpha \Delta T)$. For dimensional consistency, $\alpha = \dfrac{\Delta\rho}{\rho_0 \cdot \Delta T}$, so its unit is $K^{-1}$ or $\dfrac{1}{K}$.

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Biology QUESTION #4263

Question 15

Which of the following muscle types are involuntary in action?

Skeletal and smooth
Skeletal and cardiac
Cardiac and smooth✔️
Smooth muscle only

Correct Answer Logic:

Cardiac muscle (heart) and smooth muscle (visceral organs) are both involuntary — they function without conscious control, unlike skeletal muscle.

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General Knowledge QUESTION #2627

Question 16

The ATX form factor is most commonly associated with which computer component?

RAM modules
CPU cooling systems
Hard disk drives
Motherboards✔️

Correct Answer Logic:

ATX (Advanced Technology eXtended) is the most common form factor for motherboards. Form factor refers to the size and shape specifications. ATX defines the physical dimensions, mounting hole positions, and power connector layout of the most widely used motherboards in desktop computers.

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Security Measures to Maintain Law and Order QUESTION #910

Question 17

The "Permit System" for airport employees is a measure to maintain:

Financial records
Internal Law & Order✔️
Speed of work
Staff attendance

Correct Answer Logic:

By controlling who goes where (Access Control), the permit system prevents unauthorized internal interference.

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English QUESTION #2792

Question 18

Which is the CORRECTLY SPELLED word?

Neccessary
Necesary
Neccesary
Necessary✔️

Correct Answer Logic:

The correct spelling is 'Necessary' — one 'c' and double 's'. A helpful mnemonic: a shirt has one Collar (1 c) and two Sleeves (2 s's) — so 'necessary' has 1 'c' and 2 's'.

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Dairy Food Science and Technology QUESTION #5939

Question 19

The Reductase test (MBRT) result is interpreted based on:

The volume of methylene blue reduced per hour
The time taken for the blue color to disappear — shorter time indicates poorer milk quality (higher microbial load)✔️
The color produced when methylene blue reacts with fat
The $\text{pH}$ change upon addition of methylene blue

Correct Answer Logic:

MBRT interpretation: Very Good: $>5.5\;\text{h}$ (TPC $<500{,}000/\text{mL}$); Good: $2\text{–}5.5\;\text{h}$; Fair: $20\;\text{min}\text{–}2\;\text{h}$; Poor: $<20\;\text{min}$ (TPC $>20$ million/mL).

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General Knowledge QUESTION #273

Question 20

The Boao Forum for Asia was founded in:

2001✔️
2002
2003
None of these

Correct Answer Logic:

It was established in 2001 as a non-profit organization.

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