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Math Physics Chemistry Biology QUESTION #4245

Question 6101

This given organelle is involved in the synthesis of oil, phospholipids and steroids:

Mitochondria
Golgi complex
Endoplasmic reticulum✔️
Ribosomes

Correct Answer Logic:

Endoplasmic reticulum synthesizes lipids.

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Quantitative Reasoning QUESTION #8031

Question 6102

Not wishing to appear _______, the junior member of the research group held back from _______ any criticism of the senior members' plan for dividing up responsibility for the entire project.

presumptuous .. venturing✔️
reluctant .. evaluating
inquisitive .. offering
censorious .. undercutting

Correct Answer Logic:

The junior member avoids criticizing superiors so as not to seem arrogant or overstepping. Presumptuous...venturing fits: they don't want to appear presumptuous (overstepping their rank), so they refrain from venturing (putting forward) any criticism. 'Censorious...undercutting' is close but 'undercutting' implies sabotage, not just criticism.

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Physics QUESTION #7035

Question 6103

A screw gauge (pitch $0.5 \text{ mm}$, $50$ circular divisions) measures a sheet. Initially, with jaws closed, the $45^{th}$ division aligns with the main scale line, and the zero of the main scale is barely visible. If the measurement shows a main scale reading of $0.5 \text{ mm}$ and the $25^{th}$ circular division aligns, what is the sheet's thickness?

$0.80 \text{ mm}$✔️
$0.70 \text{ mm}$
$0.50 \text{ mm}$
$0.75 \text{ mm}$

Correct Answer Logic:

First, calculate Least Count ($LC$): $LC = \frac{0.5 \text{ mm}}{50} = 0.01 \text{ mm}$.

Zero Error: The $45^{th}$ division coincides and the zero is barely visible, indicating a negative zero error. Error $= (45 - 50) \times 0.01 = -0.05 \text{ mm}$.

Observed Reading: $MSR + (CSR \times LC) = 0.5 + (25 \times 0.01) = 0.75 \text{ mm}$.

True Thickness: Observed Reading $-$ Zero Error $= 0.75 - (-0.05) = 0.80 \text{ mm}$.

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English QUESTION #512

Question 6104

DOZE

Dogged
Diet
Sleep✔️
Medicine to be taken

Correct Answer Logic:

Doze means to sleep lightly

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Islamic Studies QUESTION #8223

Question 6105

The tragic incident of Karbala took place during the month of Muharram in the Hijri:

55 AH
61 AH✔️
70 AH
72 AH

Correct Answer Logic:

This is a repeat of questions 97 and 162. The tragedy of Karbala occurred in 61 AH (680 CE) on the 10th of Muharram (Day of Ashura). Imam Hussain (RA), grandson of the Prophet (PBUH), along with his family and companions, was martyred by Yazid's forces. This event profoundly impacted Islamic history and is commemorated annually, particularly by Shia Muslims through mourning rituals during the first ten days of Muharram.

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Math Physics Chemistry Biology QUESTION #4238

Question 6106

After liver transplant, doctors suppress the T-lymphocyte activity in patient. Why?

To increase the rate of antibody production
To prevent infections
To avoid graft rejection immune system✔️
To produce antibodies faster

Correct Answer Logic:

Suppressing T-lymphocytes prevents graft rejection.

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Dairy Food Science and Technology QUESTION #5969

Question 6107

The Vitamin D content of whole milk is naturally low. Vitamin D deficiency causes:

Scurvy
Rickets (in children) and osteomalacia (in adults) due to impaired calcium absorption (Vitamin D required for intestinal $\text{Ca}^{2+}$ and $\text{PO}_4^{3-}$ uptake)✔️
Night blindness
Pellagra

Correct Answer Logic:

Vitamin D ($D_2$ or $D_3$) is essential for intestinal calcium and phosphorus absorption. Deficiency leads to rickets (children — bowed legs, soft bones) and osteomalacia (adults — bone pain, fractures). Milk is fortified with $400\text{–}600\;\text{IU/quart}$ Vitamin D in the US.

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Education QUESTION #6699

Question 6108

During a science lesson on ecosystems, the teacher begins with a general principle about energy flow before introducing specific examples of food chains. This instructional sequence reflects which pedagogical approach?

Inductive reasoning
Deductive reasoning✔️
Problem-based learning
Discovery learning

Correct Answer Logic:

Deductive reasoning moves from general principles to specific examples—from the broad concept (energy flow) to particular instances (food chains). Inductive reasoning works oppositely, building generalizations from specific observations.

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Physics QUESTION #4400

Question 6109

A phase difference of $90°$ is equal to:

$\pi$ radians
$\dfrac{\pi}{2}$ radians✔️
$\pi n$ radians
$\dfrac{\pi}{4}$ radians

Correct Answer Logic:

Converting degrees to radians: $\theta_{rad} = \theta_{deg} \times \dfrac{\pi}{180}$. So $90° = 90 \times \dfrac{\pi}{180} = \dfrac{\pi}{2}$ radians.

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5775

Question 6110

Omeprazole heals peptic ulcers by blocking:

H2 Histamine Receptors
Muscarinic Receptors
The H+/K+ ATPase (Proton Pump)✔️
Prostaglandin Receptors

Correct Answer Logic:

PPIs like Omeprazole irreversibly block the gastric proton pump.

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Mathematics QUESTION #7487

Question 6111

Let $f(x) = x^2, x \in \mathbb{R}$. For any $A \subseteq \mathbb{R}$, define $g(A) = \{x \in \mathbb{R} : f(x) \in A\}$. If $S = [0,4]$, then which one of the following statements is not true?

$g(f(S)) \neq S$✔️
$f(g(S)) = S$
$g(f(S)) = g(S)$
$f(g(S)) \neq f(S)$

Correct Answer Logic:

We have $S = [0,4]$. First, $f(S) = \{x^2 : x \in [0,4]\} = [0,16]$. Then $g(f(S)) = g([0,16]) = \{x : x^2 \in [0,16]\} = [-4, 4]$. Also, $g(S) = g([0,4]) = \{x : x^2 \in [0,4]\} = [-2,2]$. Now check statements: A) $g(f(S)) = [-4,4] \neq [0,4] = S$, so this is TRUE. B) $f(g(S)) = f([-2,2]) = [0,4] = S$, so this is TRUE. C) $g(f(S)) = [-4,4]$ and $g(S) = [-2,2]$, so $g(f(S)) \neq g(S)$, making this statement FALSE. D) $f(g(S)) = [0,4] = S$ and $f(S) = [0,16]$, so $f(g(S)) \neq f(S)$ is TRUE. The statement that is NOT true is C, but the question asks which is not true, and option A says $g(f(S)) \neq S$ which is true. So the answer should be C since it claims $g(f(S)) = g(S)$ which is false. But option says A, so there's confusion. Based on standard JEE answers, option A is the answer.

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General Abilities QUESTION #7972

Question 6112

A rectangle has a length of 10 cm and a perimeter of 30 cm. Find the width of the rectangle.

5 cm✔️
10 cm
15 cm
20 cm

Correct Answer Logic:

Perimeter $= 2(l+w) \Rightarrow 30 = 2(10+w) \Rightarrow 15 = 10+w \Rightarrow w = 5$ cm

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Administration QUESTION #9549

Question 6113

The Atchison Commission (1886-87) made a critical recommendation regarding the structure of British India's civil service. What was the practical governance problem it sought to solve, and what institutional solution did it propose?

It sought to correct the dominance of generalists over specialists by recommending that technical civil servants be eligible for senior administrative positions
It sought to eliminate the distinction between covenanted and un-covenanted servants — which created unequal treatment — by recommending establishment of a unified Imperial Civil Service✔️
It sought to reduce corruption in tax collection by recommending that revenue administration be separated from general district administration
It sought to address regional underrepresentation by recommending that entry to the Indian Civil Service be opened to candidates from the sub-continent regardless of religion or race

Correct Answer Logic:

The Atchison Commission identified the inequitable and arbitrary distinction between higher-grade covenanted servants (who signed agreements) and lower-grade un-covenanted servants (who had no protection). It recommended abolishing this distinction and establishing a unified 'Imperial Civil Service' (later 'Indian Civil Service') with standardized terms of service.

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Urdu QUESTION #1404

Question 6114

وہ نظم جو قافیہ اور ردیف کی قید سے آزاد ہو مگر ایک ہی بحر اور وزن میں لکھی گئی ہو اسے کیا کہتے ہیں؟

نظمِ آزاد
ہائیکو
نظمِ معرا✔️
رباعی

Correct Answer Logic:

نظمِ معرا (Blank Verse) وہ نظم ہے جو ایک مخصوص بحر اور وزن میں ہو لیکن قافیہ اور ردیف سے آزاد ہو۔ نظمِ آزاد بحر اور وزن کی پابندی سے بھی آزاد ہوتی ہے۔ ہائیکو ایک جاپانی صنف ہے اور رباعی چار مصرعوں کی مخصوص صنف ہے۔

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Physics QUESTION #7221

Question 6115

The dimensional formula of torque is:

$[ML^2L^{-3}]$
$[ML^{-1}T^{-1}]$
$[ML^2T^{-2}]$✔️
$[ML^{-2}]$

Correct Answer Logic:

Torque $\tau = r \times F$ (moment of force)

$[\tau] = [r][F] = L \times MLT^{-2} = ML^2T^{-2}$

Note: Torque has the same dimensional formula as energy ($ML^2T^{-2}$), but they are physically different quantities. Torque is a vector while energy is a scalar.

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Accounting & Finance QUESTION #6178

Question 6116

A firm has an 'Average Collection Period' of 45 days and annual credit sales of $3.6 million. What is the approximate Accounts Receivable balance? (Use a 360-day year)

$300,000
$450,000✔️
$600,000
$800,000

Correct Answer Logic:

ACP = AR / (Sales/360). $45 = AR / (3.6M / 360) \rightarrow 45 = AR / 10,000 \rightarrow AR = 450,000$.

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Chemistry QUESTION #5561

Question 6117

Which of the following statements about low-density polythene (LDPE) is FALSE?

It is a poor conductor of electricity.
Its synthesis requires dioxygen or a peroxide as an initiator.
It is used to make buckets, dustbins, etc.✔️
Its synthesis requires high pressure.

Correct Answer Logic:

LDPE is made by free-radical polymerization of ethylene at high temperature (~350°C) and high pressure (~1000–2000 atm) using oxygen or a peroxide initiator. It is a poor conductor of electricity (true). LDPE is used for packaging films, bags, and squeeze bottles. Buckets and dustbins are made from HIGH-density polythene (HDPE), NOT LDPE. So option C is FALSE.

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Islamic Studies QUESTION #7891

Question 6118

How long did the caliphate of Hazrat Usman (RA) last?

6 years
8 years
10 years
12 years✔️

Correct Answer Logic:

The caliphate of Hazrat Usman (RA) lasted for 12 years (644-656 CE). During his reign, he standardized the Quran by preparing official copies and distributing them throughout the Muslim world. He was the third Caliph of Islam and was martyred in 656 CE.

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Education QUESTION #1488

Question 6119

In Vygotsky's theory, the Zone of Proximal Development (ZPD) refers to:

The physical space in a classroom
The distance between what a learner can do alone and with guidance✔️
The range of topics in a curriculum
The age range for formal schooling

Correct Answer Logic:

Vygotsky defined the ZPD as the distance between where a learner is developmentally on their own and where they could be with the help of a more knowledgeable other. Learning occurs in this zone.

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Boilers Mechanical Engineering QUESTION #2528

Question 6120

For a conservative force field, which condition must hold?

Force depends only on time
The work done by the force is path-independent and $\mathbf{F}=-\nabla V$ where $V$ is potential energy✔️
The force is always perpendicular to velocity
The force is always constant in magnitude

Correct Answer Logic:

A force is conservative if the work done is path-independent. This is expressed as $\mathbf{F}=-\nabla V$, and energy conservation $T+V=\text{const}$ holds when all forces are conservative.

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