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Dairy Food Science and Technology QUESTION #5997

The 'water holding capacity' (WHC) of yoghurt gel is related to:

Total fat content of the milk used
The protein network density, degree of cross-linking, and porosity of the casein gel — determined by pre-heat treatment of milk (denatured $\beta$-Lg plugs gel pores), fermentation $\text{pH}$, and protein concentration✔️
The amount of starter culture added
Incubation temperature above $45^{\circ}\text{C}$

Correct Answer Logic:

WHC of yoghurt gel determines syneresis susceptibility. High WHC $=$ less syneresis. WHC is improved by: high heat treatment of milk ($90\text{–}95^{\circ}\text{C}/5\text{–}10\;\text{min}$) — denatured $\beta$-Lg associates with $\kappa$-casein increasing network density; higher protein concentration (SMP fortification); slower acidification; EPS-producing strains.

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Physics QUESTION #1173

Question 10642

Alpha particles and electrons having the same energy — their associated De Broglie wavelengths are:

Equal
Longer than electrons (alpha has longer wavelength)
Smaller than electrons (alpha has shorter wavelength)✔️
None of these

Correct Answer Logic:

De Broglie wavelength: $\lambda = \frac{h}{\sqrt{2mE}}$. At the same kinetic energy $E$, $\lambda \propto \frac{1}{\sqrt{m}}$. Since $m_\alpha \gg m_e$ (alpha particle is ~7294 times heavier), $\lambda_\alpha \ll \lambda_e$. So alpha particles have a much shorter De Broglie wavelength than electrons at the same energy.

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Psychology QUESTION #9795

Question 10643

The body's natural tendency to maintain a state of internal balance or equilibrium is called:

Arousal
Opponent process
Homeostasis✔️
Instinct

Correct Answer Logic:

Homeostasis (Walter Cannon) is the body's self-regulating process maintaining stable internal conditions such as temperature and blood sugar. When balance is disrupted, motivational states arise to restore equilibrium.

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Maths QUESTION #2877

Question 10644

Average of $12, 15, 18, 21, 24$ is:

15
18✔️
21
20

Correct Answer Logic:

Since the numbers are in an arithmetic progression, the average is the middle term: $18$.

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General Knowledge QUESTION #4775

Question 10645

After Pashtuns, which ethnic group constitutes the second-largest population in Afghanistan?

Uzbeks
Hazaras
Tajiks✔️
Turkmens

Correct Answer Logic:

Tajiks are the second-largest ethnic group in Afghanistan after Pashtuns, comprising approximately 27% of the population. They are predominantly found in northern and western Afghanistan.

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Biology QUESTION #7273

Question 10646

Phylogenetic system of classification is based on:

Floral characters
Evolutionary relationships✔️
Morphological features
Chemical constituents

Correct Answer Logic:

A phylogenetic (or cladistic) system of classification is based on evolutionary relationships among organisms, reflecting their common ancestry. It uses molecular data, fossil records, and comparative anatomy to construct evolutionary trees. Bentham and Hooker used a natural system based on morphology; Engler and Prantl used a phylogenetic approach.

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Boilers Mechanical Engineering QUESTION #2515

Question 10647

A particle moves along a curve. Its position vector is $\mathbf{r}(t)$. The velocity is defined as:

The second derivative $\ddot{\mathbf{r}}$
The time derivative $\dot{\mathbf{r}} = \frac{d\mathbf{r}}{dt}$✔️
The magnitude $|\mathbf{r}|$ divided by time
The integral of acceleration

Correct Answer Logic:

By definition, velocity of a point P is $\mathbf{v} = \frac{d\mathbf{r}}{dt}$, the first time derivative of the position vector. Acceleration is the second derivative $\mathbf{a} = \ddot{\mathbf{r}}$.

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Mathematics QUESTION #4168

Question 10648

The exact value of $\int_1^3 \frac{1}{x^2} dx$ is:

$\frac{1}{3}$
$\frac{2}{3}$✔️
$\frac{1}{2}$
$1$

Correct Answer Logic:

$\int_1^3 x^{-2} dx = \left[-\frac{1}{x}\right]_1^3 = -\frac{1}{3} + 1 = \frac{2}{3}$.

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Accounting & Finance QUESTION #6159

Question 10649

In the context of the S-Type Corporation mentioned in the text, how is 'Double Taxation' avoided compared to a standard Corporation?

Profits are taxed only at the corporate level
Profits 'pass through' to owners and are reported on personal tax returns✔️
Dividends are exempt from personal income tax
The government provides a tax credit for all operational expenses

Correct Answer Logic:

As per Lesson 01, in an S-Corp, all business profits 'pass through' to owners who report them on personal returns, avoiding the corporate-level tax.

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Physics QUESTION #1066

Question 10650

A water tank with wall at $x=L$, liquid of surface tension $S$ and density $\rho$. Liquid surface height $y(x)$ satisfies which equation? (Given $\theta(x)\approx\tan\theta=\frac{dy}{dx}$):

d²y/dx² = √(ρg/S)
dy/dx = √(ρg/S)·x
d²y/dx² = (ρg/S)x
d²y/dx² = (ρg/S)y✔️

Correct Answer Logic:

The meniscus shape is governed by the balance between surface tension (curvature force) and hydrostatic pressure. The capillary equation gives: $\frac{d^2y}{dx^2} = \frac{\rho g}{S}y$. This is the standard capillary length equation where the curvature $\approx d^2y/dx^2$ for small angles equals $\rho g y/S$.

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Civil Engineering QUESTION #6641

Question 10651

Which of the following increases the 'Ductility' of a reinforced concrete section?

Increasing the concrete compressive strength
Increasing the amount of tension reinforcement beyond the balanced limit
Adding compression reinforcement✔️
Reducing the beam depth

Correct Answer Logic:

Compression steel reduces the depth of the neutral axis, which increases the strain in the tension steel at failure, thereby increasing ductility.

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English Literature QUESTION #10717

Question 10652

Who translated the original Bengali poems of Gitanjali into English?

Sir Edmund Goose
W. B. Yeats
Rev. Edmund Thomson
Rabindranath Tagore✔️

Correct Answer Logic:

Rabindranath Tagore himself translated his Bengali collection Gitanjali (Song Offerings) into English prose poems. The English translation (1912) won him the Nobel Prize in Literature in 1913 — the first non-European to receive it. W. B. Yeats wrote the famous introduction to the English edition and championed Tagore's work, but the translation was Tagore's own.

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Math Physics Chemistry Biology QUESTION #7779

Question 10653

Steroid hormone synthesis occurs mainly in which organelle?

Endoplasmic Reticulum (Smooth ER)✔️
Golgi apparatus
Lysosome
Ribosomes

Correct Answer Logic:

Smooth ER contains enzymes for lipid and steroid synthesis (e.g., in testes, ovaries, adrenal cortex). Rough ER makes proteins; Golgi modifies; lysosomes digest.

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Islamic Studies QUESTION #8229

Question 10654

What is the first written constitution in the Islamic History?

Last Address of the Prophet at Hajj
The Hudabia settlement
The Treaty (Misaq) of Madina✔️
Aaeen-e-Akbari of the Mughal era

Correct Answer Logic:

The Constitution of Medina (Misaq-e-Madina or Sahifah al-Medina) was the first written constitution in Islamic history, drafted by Prophet Muhammad (PBUH) upon his arrival in Medina in 622 CE. This groundbreaking document established the rights and duties of Muslims, Jews, and other communities in Medina, created a multi-religious Islamic state, and outlined principles of justice, mutual defense, and religious freedom—making it one of the earliest constitutional documents in world history.

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Verbal Reasoning QUESTION #8192

Question 10655 (Select all that apply)

Mary purchased a book whose price plus a 4% sales tax equaled the total amount she paid. She gave the cashier a $10 bill and received correct change of less than $3.00. Which of the following statements must be true? Select all that apply.

The price of the book was less than $9.50
The price of the book was greater than $6.90
The sales tax was less than $0.45✔️
The sales tax was greater than $0.50

Correct Answer Logic:

Let the price of the book $= p$. Total paid $= 1.04p$.

She paid $10 and received change less than $3.00, meaning total paid was more than $7.00:

$1.04p > 7.00 \Rightarrow p > 6.73$

She also received some change, so total paid $< \$10.00$:

$1.04p < 10.00 \Rightarrow p < 9.615$

So $6.73 < p < 9.615$. Now check each statement:

Statement A: $p < \$9.50$ — Not necessarily, since $p$ can be up to $9.615$. ✗
Statement B: $p > \$6.90$ — Not necessarily, $p$ can be $6.80$ (giving change $\approx \$2.93 < \$3.00$). ✗
Statement C: Sales tax $= 0.04p < 0.04 \times 9.615 \approx \$0.385 < \$0.45$. This is always true within the valid range. ✓
Statement D: Tax $> \$0.50$ would require $p > 12.50$, which is impossible here. ✗

Only Statement C must be true.

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Education QUESTION #6762

Question 10656

A teacher writes the following true/false item: 'Due to its abundant natural resources and strategic location, Pakistan has always maintained a high GDP growth rate.' What is the MOST critical flaw in this item?

The item contains a false statement, which is acceptable only for opinion-based items
The item includes two ideas in one statement, making it impossible to assign a single unambiguous true/false value✔️
The item is too long and contains complex vocabulary
The item uses an absolute qualifier (always) which automatically makes it false

Correct Answer Logic:

A core rule for constructing true/false items is: avoid including two ideas in one statement unless cause-and-effect relationships are being tested. This item combines (a) natural resources/location and (b) high GDP growth. A student might agree with the premise but disagree with the conclusion, or vice versa, making the item inherently ambiguous.

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English QUESTION #2786

Question 10657

Choose the correct word: 'The medicine had an ___ effect on his health.' (Note: 'Adverse' means harmful; 'Averse' means having a strong dislike for something)

Averse
Adversary
Adverse✔️
Adversely

Correct Answer Logic:

'Adverse' is an adjective meaning harmful or unfavorable. 'The medicine had an adverse effect on his health' correctly uses 'adverse'. 'Averse' means having a strong feeling of opposition toward something (e.g., 'He is averse to change').

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MCQs Section QUESTION #5092

Question 10658

صفر کا متضاد کیا ہے؟

گرم
کبار
افضل
سلم✔️

Correct Answer Logic:

صفر کا متضاد 'سلم' ہے جس کے معنی سلامتی یا امن کے ہیں۔

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English QUESTION #4449

Question 10659

His application for a visa was turned ____ by the consulate.

out
over
down✔️
aside

Correct Answer Logic:

To 'turn down' means to reject or refuse an application or offer.

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Agronomy QUESTION #2021

Question 10660

The Nutrient Use Efficiency (NUE) of nitrogen fertilizers in irrigated wheat in South Asia is typically:

85–90%
60–75%
30–50%✔️
10–20%

Correct Answer Logic:

NUE for nitrogen in most cereal crops under field conditions in South Asia ranges from 30–50%, meaning more than half the applied N is lost through leaching, volatilization, denitrification, and runoff. Improving NUE through split application and timing is a major agronomic challenge.

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