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Biology Zoology Botany QUESTION #1377

Which organelle is involved in modifying, sorting, and packaging proteins for secretion?

Endoplasmic reticulum
Golgi apparatus✔️
Lysosome
Peroxisome

Correct Answer Logic:

The Golgi apparatus (Golgi complex) is the cell's main processing and distribution centre for proteins and lipids. Proteins synthesised in the rough endoplasmic reticulum are transported to the Golgi where they are modified (glycosylation, phosphorylation), sorted, and packaged into vesicles for secretion, delivery to lysosomes, or incorporation into the plasma membrane.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3036

Question 522

'Geometric Dilution' is a method used to:

Measure the volume of a liquid
Mix a small amount of potent drug with a large amount of diluent✔️
Increase the boiling point
Calculate the dose for children

Correct Answer Logic:

Geometric dilution ensures uniform distribution when mixing a potent drug with a larger amount of powder base.

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Electrical Engineering QUESTION #2166

Question 523

A DC-DC buck converter has $V_{in} = 24\,\text{V}$, $V_{out} = 12\,\text{V}$, $f_{sw} = 100\,\text{kHz}$, and load current $I_L = 2\,\text{A}$. The minimum inductance for continuous conduction mode (CCM) is:

$15\,\mu\text{H}$✔️
$30\,\mu\text{H}$
$60\,\mu\text{H}$
$7.5\,\mu\text{H}$

Correct Answer Logic:

Duty cycle $D = V_{out}/V_{in} = 0.5$. $L_{min} = \frac{V_{out}(1-D)}{2 f_{sw} I_L} = \frac{12 \times 0.5}{2 \times 10^5 \times 2} = \frac{6}{4 \times 10^5} = 15\,\mu\text{H}$.

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Mathematics QUESTION #4102

Question 524

The order of element $4$ in the cyclic group $\mathbb{Z}_{18}$ is:

$9$✔️
$4$
$6$
$18$

Correct Answer Logic:

The order of element $k$ in $\mathbb{Z}_n$ is $\dfrac{n}{\gcd(k,n)}$. Here: $\dfrac{18}{\gcd(4,18)}=\dfrac{18}{2}=9$. So element $4$ has order $9$ in $\mathbb{Z}_{18}$.

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Statistics QUESTION #1968

Question 525

A survey carried out using a well-defined sampling design and procedure is formally called a:

Sample survey✔️
Population survey
Systematic survey
Census survey

Correct Answer Logic:

A sample survey is conducted using a sampling design, where only a subset (sample) of the population is observed, as opposed to a complete enumeration (census).

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Biology QUESTION #4261

Question 526

If a normal person marries with a colour blind female, what will be the possibility of a normal male child?

0%✔️
25%
50%
75%

Correct Answer Logic:

A colour blind female has genotype $X^c X^c$. A normal male has genotype $X^N Y$. All sons receive $X^c$ from mother and $Y$ from father, making all sons colour blind ($X^c Y$). So 0% chance of a normal male child.

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Urdu QUESTION #5192

Question 527

کشیدہ خاطر کی ترکیب کا مفہوم ہے؟

خوش ہونا
ناراض ہونا✔️
پریشان ہونا
ان میں سے کوئی نہیں

Correct Answer Logic:

کشیدہ خاطر ہونا محاورے کا مطلب ہے ناراض یا رنجیدہ ہونا۔

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Adult Health [Medicine and Surgery] QUESTION #3917

Question 528

A 25-year-old female presents with unexplained weight loss, fine tremors, and heat intolerance. Her pulse is $100/ ext{min}$, and she has a smooth goiter with observable lid lag. Which of the following is the most likely diagnosis?

Graves' disease✔️
Toxic multinodular goiter
De Quervain's thyroiditis
Hashimoto's thyroiditis

Correct Answer Logic:

No explanation provided for this question.

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Agronomy QUESTION #2068

Question 529

Relay intercropping is distinguished from simultaneous intercropping in that:

Both crops are planted on the same date in relay cropping
In relay intercropping, the second crop is planted into the standing first crop before it is harvested, so the two crops overlap only for part of their respective growing seasons — optimizing land use and extending the effective growing season✔️
Relay cropping always involves a cereal–legume combination while simultaneous intercropping is limited to two cereals
Relay intercropping requires wider row spacing than simultaneous intercropping

Correct Answer Logic:

Relay intercropping staggers planting times: Crop 1 is established first, and Crop 2 is seeded into it while Crop 1 is still growing (often near maturity). This extends total land occupancy, reduces competition during critical periods, and allows double or triple cropping in areas with short growing seasons — e.g., wheat–mungbean relay in Punjab.

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Mathematics QUESTION #4136

Question 530

If $\vec{a} \times (\vec{b} \times \vec{c}) = (\vec{a} \times \vec{b}) \times \vec{c}$, what can we conclude about vectors $\vec{a}$ and $\vec{c}$?

$\vec{a}$ is perpendicular to $\vec{c}$
$\vec{a}$ and $\vec{c}$ are parallel✔️
$\vec{b}$ is perpendicular to both $\vec{a}$ and $\vec{c}$
$\vec{a} = \vec{c}$

Correct Answer Logic:

Using vector triple product identity: $\vec{a} \times (\vec{b} \times \vec{c}) = (\vec{a} \cdot \vec{c})\vec{b} - (\vec{a} \cdot \vec{b})\vec{c}$ and $(\vec{a} \times \vec{b}) \times \vec{c} = (\vec{a} \cdot \vec{c})\vec{b} - (\vec{b} \cdot \vec{c})\vec{a}$. Equating gives $(\vec{a} \cdot \vec{b})\vec{c} = (\vec{b} \cdot \vec{c})\vec{a}$, implying $\vec{a}$ and $\vec{c}$ are parallel.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3358

Question 531

'Binary Fission' is the primary method of reproduction for:

Viruses
Bacteria✔️
Fungi
Humans

Correct Answer Logic:

A single cell splits into two identical daughter cells.

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Mathematics QUESTION #1311

Question 532

For the Gauss-Seidel method to be guaranteed to converge, the coefficient matrix should be:

Symmetric
Orthogonal
Diagonally dominant✔️
Singular

Correct Answer Logic:

A sufficient condition for convergence of Gauss-Seidel (and Jacobi) is that the matrix is strictly diagonally dominant: $|a_{ii}|>\sum_{j\neq i}|a_{ij}|$ for each row $i$. Diagonal dominance ensures the iteration converges from any starting point.

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CISA QUESTION #1765

Question 533

Which of the following would NOT be classified as a control failure?

Using a policy that has no detective mechanism to identify violations
Modifying an ineffective procedure outside of change control
Testing to determine how many policy violations have occurred✔️
Implementing a policy or standard without defining consequences for non-compliance

Correct Answer Logic:

Testing to discover policy violations is an example of a detective control in action — it is not a control failure. All other options represent failures because they lack detection, bypass change control, or implement controls without enforcement mechanisms.

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Chemistry QUESTION #1075

Question 534

The oxidation states of the underlined elements in $\underline{\text{K}}\text{O}_2$, $\text{H}_2\underline{\text{O}}_2$ and $\text{H}_2\underline{\text{S}}\text{O}_4$ are respectively:

$+1, -2,$ and $+4$
$+4, -4,$ and $+6$
$+1, -1,$ and $+6$✔️
$+2, -2,$ and $+6$

Correct Answer Logic:

In KO$_2$ (potassium superoxide): K is +1, O$_2^-$ so O is $-\frac{1}{2}$... but underlined is K: $+1$. In H$_2$O$_2$: underlined O has oxidation state $-1$. In H$_2$SO$_4$: underlined S has oxidation state $+6$. So the answer is $+1, -1, +6$.

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Security Measures to Maintain Law and Order QUESTION #898

Question 535

If an AD ASF is offered a "Bribe" to bypass a security measure, they are tried under:

Prevention of Corruption Act
Pakistan Army Act
ASF Act
All of these✔️

Correct Answer Logic:

They are subject to the specific service laws (Army Act via 7-A) and general criminal laws of Pakistan.

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Others section QUESTION #4684

Question 536

Andrei Sakharov is correctly described as which of the following?

Anti-Soviet Polish Leader
Secretary General of the Hungarian Communist Party
Soviet Nuclear Scientist✔️
Soviet Diplomat

Correct Answer Logic:

Andrei Sakharov was a prominent Soviet nuclear physicist and dissident who advocated for civil liberties and nuclear disarmament; he received the Nobel Peace Prize in 1975.

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Biology Zoology Botany QUESTION #1361

Question 537

The phase of mitosis in which chromosomes align at the cell's equator is called:

Anaphase
Telophase
Metaphase✔️
Prophase

Correct Answer Logic:

During metaphase (the middle phase of mitosis), chromosomes become maximally condensed and are aligned along the cell's equatorial plane (metaphase plate) by spindle fibres attached to the centromeres (kinetochores). This alignment ensures accurate segregation of sister chromatids to the two daughter cells in the subsequent anaphase.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #2992

Question 538

What is the concentration of Sucrose in 'Simple Syrup BP'?

$66.7\%\text{ w/w}$✔️
$85\%\text{ w/v}$
$50\%\text{ w/w}$
$60\%\text{ w/v}$

Correct Answer Logic:

Syrup BP contains $66.7\%\text{ w/w}$ sucrose, whereas USP contains $85\%\text{ w/v}$.

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Mathematics QUESTION #4145

Question 539

Solve $\frac{dy}{\sqrt{1-y^2}} = \frac{dx}{\sqrt{1-x^2}}$ with $y(0) = \frac{\sqrt{3}}{2}$. What is the solution?

$\sin^{-1}(y) = \sin^{-1}(x) + \frac{\pi}{3}$
$\sin^{-1}(y) = \sin^{-1}(x) + \frac{\pi}{6}$
$y = \sin(\sin^{-1}(x) + \frac{\pi}{3})$
Both (A) and (C)✔️

Correct Answer Logic:

Integrating: $\sin^{-1}(y) = \sin^{-1}(x) + C$. At $x=0$, $y=\frac{\sqrt{3}}{2}$: $\frac{\pi}{3} = 0 + C$, so $C = \frac{\pi}{3}$. Thus $\sin^{-1}(y) = \sin^{-1}(x) + \frac{\pi}{3}$, equivalent to $y = \sin(\sin^{-1}(x) + \frac{\pi}{3})$.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3171

Question 540

The 'Diaphysis' of a long bone is its:

End
Shaft✔️
Growth plate
Marrow cavity

Correct Answer Logic:

The diaphysis is the long central shaft; the ends are called epiphyses.

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