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Dairy Food Science and Technology QUESTION #5957
Question 1
In dairy plant design, 'pasteurized product contamination by raw milk' in plate heat exchangers (PHE) is prevented by:
  • Using thicker gaskets between raw and pasteurized milk channels
  • Designing the regeneration section with higher pressure on the pasteurized side (\(\geq 14\;\text{kPa}\) or \(2\;\text{psi}\) above raw milk pressure) than the raw milk sideβœ”οΈ
  • Using separate PHEs for raw and pasteurized milk
  • Monitoring conductivity of milk streams
Correct Answer Logic:
In HTST PHE regeneration sections, regulations require that pasteurized milk pressure exceed raw milk pressure by \(\geq 14\;\text{kPa}\) (\(2\;\text{psi}\)), ensuring that any leakage is from pasteurized to raw (not raw to pasteurized), preventing contamination of the pasteurized product stream.
Uploaded by: Fani Warraich
MBBS QUESTION #10367
Question 2
DNA polymerase synthesizes new DNA strands only in which direction, a constraint that necessitates discontinuous synthesis (via Okazaki fragments) on the lagging strand during replication?
  • 5' to 3'βœ”οΈ
  • 3' to 5'
  • Bidirectionally, starting from any point along the template
  • Direction is irrelevant to DNA polymerase's mechanism
Correct Answer Logic:
DNA polymerases can only add new nucleotides to the free 3'-hydroxyl end of a growing strand, synthesizing DNA exclusively in the 5' to 3' direction; since the two template strands run antiparallel, one new strand (leading) can be synthesized continuously while the other (lagging) must be synthesized discontinuously as short Okazaki fragments, later joined by DNA ligase.
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Correct Answer Logic:

Option D (2 and 4) is correct.

  • Lenders: Need to know if the business can meet short-term obligations and repay loans.
  • Suppliers: Need to know if the business can pay its bills on time.

Government focuses on profitability/tax. Public/environmental bodies focus on social impact.

Uploaded by: Fani Warraich
Correct Answer Logic:
Projection of \(\vec{b}\) on \(\vec{a}\) is \(\frac{\vec{b} \cdot \vec{a}}{|\vec{a}|^2}\vec{a} = \vec{a}\). So \(\vec{b} \cdot \vec{a} = |\vec{a}|^2 = 1+1+2 = 4\). Thus \(b_1 + b_2 + 2 = 4\), giving \(b_1+b_2 = 2\). Condition \((\vec{a}+\vec{b}) \perp \vec{c}\): \((1+b_1)(5) + (1+b_2)(1) + (2\sqrt{2})(\sqrt{2}) = 0\), giving \(5+5b_1+1+b_2+4 = 0\), so \(10+5b_1+b_2 = 0\). From \(b_1+b_2=2\): \(b_2 = 2-b_1\), substituting: \(10+5b_1+2-b_1 = 0\), so \(4b_1 = -12\) and \(b_1 = -3\), giving \(b_2 = 5\). Thus \(\vec{b} = -3\hat{i}+5\hat{j}+\sqrt{2}\hat{k}\), and \(|\vec{b}| = \sqrt{9+25+2} = \sqrt{36} = 6\).
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Education QUESTION #6741
Question 5
In lesson planning, 'anticipatory set' functions PRIMARILY to:
  • Summarize the lessonβœ”οΈ
  • Capture attention
  • activate prior knowledge
  • and establish purpose at lesson beginning
Correct Answer Logic:
Replace instruction
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Mathematics QUESTION #6011
Question 6

Identify the curve from the family defined by $(x^2-y^2)\,dx + 2xy\,dy = 0$ that passes through the point $(1,1)$.

  • A circle centred on the $x$-axis
  • An ellipse with major axis along the $y$-axis
  • A circle centred on the $y$-axisβœ”οΈ
  • A hyperbola with transverse axis along the $x$-axis
Correct Answer Logic:

Rewrite: $\frac{dy}{dx} = \frac{y^2-x^2}{2xy}$. This is a homogeneous ODE. Let $y=vx$:

$\frac{1-v^2}{2v}dx + x\,dv/... $

After solving, the general solution is $x^2 + y^2 = Cy$ (circles with centres on the $y$-axis).

Substituting $(1,1)$: $1+1=C\cdot1 \Rightarrow C=2$, giving $x^2+y^2=2y$, i.e. $x^2+(y-1)^2=1$.

This is a circle centred on the $y$-axis at $(0,1)$.

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Physics QUESTION #7868
Question 7

Speed of sound in ideal gas does NOT depend on:

  • Density
  • Moisture
  • Pressureβœ”οΈ
  • Temperature
Correct Answer Logic:

For ideal gas, v = √(γRT/M). Pressure has no effect at constant temperature; moisture slightly affects density but the question says ideal gas: strictly, pressure independent.

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Psychology QUESTION #9945
Question 8
The Binet-Simon Scale was adapted for American use by:
  • Thurstone
  • Termanβœ”οΈ
  • Wechsler
  • Binet
Correct Answer Logic:
Lewis Terman at Stanford University adapted and standardized the Binet-Simon Scale for American use in 1916, creating the Stanford-Binet Intelligence Scale and introducing the IQ concept (mental age/chronological age Γ— 100).
Uploaded by: Fani Warraich
Correct Answer Logic:
Haber process (NH\(_3\) synthesis): Fe catalyst (I). Wacker oxidation (ethylene to acetaldehyde): PdCl\(_2\) (II). Wilkinson catalyst (hydrogenation): [(PPh\(_3)_3\)RhCl] (III). Ziegler-Natta catalyst (polymerization): TiCl\(_4\) + Al(CH\(_3)_3\) (IV). Matching: A-I, B-II, C-III, D-IV.
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Correct Answer Logic:

Choose 4 novels from 6: $\binom{6}{4} = 15$ ways.

Choose 1 dictionary from 3: $\binom{3}{1} = 3$ ways.

Arrange 5 books in a row with dictionary fixed in the middle: the 4 novels occupy the 4 remaining positions, giving $4! = 24$ arrangements.

Total $= 15 \times 3 \times 24 = \mathbf{1080}$

Since $1080 \geq 1000$, the answer is at least 1000.

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Correct Answer Logic:

NACTE — the National Accreditation Council for Teacher Education — is the body in Pakistan responsible for accrediting teacher training programmes and institutions, ensuring they meet national quality standards. It was established to regulate and improve the quality of teacher education across the country.

Correct Answer: C — NACTE.

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Chemistry QUESTION #430
Question 12
__________ has dipole moment.
  • COβœ”οΈ
  • CO?
  • Benzene
  • All of these
Correct Answer Logic:
CO has permanent dipole moment
Uploaded by: Fani Warraich
Correct Answer Logic:

Radius of curvature $R = \frac{v^2}{a_{\perp}}$.

  • At $t=1$: $v_x = 10 \cos 60^{\circ} = 5$; $v_y = 10 \sin 60^{\circ} - 10(1) = 5\sqrt{3} - 10 \approx -1.34$.
  • Total $v = \sqrt{5^2 + (-1.34)^2} \approx 5.18$.
  • $a_{\perp} = g \cos \theta$ where $\theta$ is the angle of the velocity vector. After calculation, $R \approx 2.8\text{ m}$.
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Math Physics Chemistry Biology QUESTION #4226
Question 14
The hormone, when overproduced can lead to hypercalcemia and stone formation is:
  • Insulin
  • Thyroxine
  • Parathyroid hormoneβœ”οΈ
  • Antidiuretic hormone
Correct Answer Logic:
Parathyroid hormone excess increases blood $\text{Ca}^{2+}$ leading to stones.
Uploaded by: Fani Warraich
English QUESTION #8315
Question 15
That colour will not _______ your complexion.
  • Soot
  • Suite
  • Suitβœ”οΈ
  • None of these
Correct Answer Logic:
'Suit' means to look attractive on someone.
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Math Physics Chemistry Biology QUESTION #4229
Question 16
Which of the following statement correctly describes the organelle that is not membrane bound?
  • Presence of cristae
  • Modification and packaging of proteins
  • Presence of digestive enzymes
  • Made of rRNA and proteinβœ”οΈ
Correct Answer Logic:
Ribosomes are made of rRNA and protein, not membrane-bound.
Uploaded by: Fani Warraich
Correct Answer Logic:
Homoleptic = only one type of ligand. (A) has \(\text{CN}^-\) and NO β€” not homoleptic. (B) \([\text{CoF}_6]^{3-}\): F is weak field β†’ high spin. (C) \([\text{Fe(CN)}_6]^{4-}\): \(\text{CN}^-\) is strong field β†’ low spin, homoleptic. (D) \([\text{Co(NH}_3)_6]^{3+}\): \(\text{NH}_3\) is moderate-strong field on \(\text{Co}^{3+}\) β†’ low spin, homoleptic. So (C) and (D) are both homoleptic and low spin.
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Law QUESTION #9688
Question 18
Article 48 on entries in books of account β€” such entries are relevant whenever they refer to a matter under Court inquiry, but:
  • They are sufficient alone to charge liability
  • They shall not alone be sufficient evidence to charge any person with liabilityβœ”οΈ
  • They are only admissible with corroborating documents
  • They must be attested by an auditor
Correct Answer Logic:
Article 48 expressly states that such entries are relevant whenever they refer to a matter under Court inquiry but 'such statements shall not alone be sufficient evidence to charge any person with liability.'
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Correct Answer Logic:
Jinnah left the Congress in 1920.
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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3016
Question 20
Creams are semi-solid emulsions that are usually:
  • Water-in-Oil (W/O)
  • Oil-in-Water (O/W)
  • Either W/O or O/Wβœ”οΈ
  • Neither
Correct Answer Logic:
Creams can be either W/O (cold creams) or O/W (vanishing creams).
Uploaded by: Fani Warraich