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Biology Zoology Botany QUESTION #1361

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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Mechanical Engineering QUESTION #2486

Question 1482

In the kinetostatics of a crank-slider mechanism, the force exerted by link $i$ on link $j$ is denoted $F_{ij}$. Newton's third law requires that:

$F_{ij} = F_{ji}$
$\mathbf{F}_{ij} = -\mathbf{F}_{ji}$ (equal magnitude, opposite direction)✔️
$|F_{ij}| = |F_{ji}|$ only when the links have equal mass
$F_{ij} + F_{ji} = m\mathbf{a}$

Correct Answer Logic:

By Newton's third law, the reaction forces between two links are equal in magnitude and opposite in direction: $\mathbf{F}_{ij}=-\mathbf{F}_{ji}$.

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Biology QUESTION #4197

Question 1483

HIV belongs to which class of virus with respect to genome type?

Single stranded DNA viruses
Double stranded RNA viruses
ssRNA: template for DNA synthesis✔️
ssRNA: template for mRNA synthesis

Correct Answer Logic:

HIV is a retrovirus with single-stranded RNA that serves as template for DNA synthesis via reverse transcriptase.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3567

Question 1484

'Coriander' (Dhania) is used as a:

Stimulant and Carminative✔️
Poison
Narcotic
Hormone

Correct Answer Logic:

Coriandrum sativum is a common digestive aid.

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English QUESTION #820

Question 1485

Spot the error: 'The duties of the new secretary are (A)to answer the telephone, (B)to type letters, and (C)book (D)keeping.'

to answer the telephone
to type letters
book✔️
keeping

Correct Answer Logic:

The error is at (C). To maintain parallel structure with 'to answer' and 'to type', it should be 'to keep books' or 'bookkeeping' as one word. The list breaks parallelism at 'book keeping'.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3001

Question 1486

A 'Gargle' is usually supplied as a:

Concentrated solution to be diluted✔️
Ready-to-use thick syrup
Sterile injection
Topical powder

Correct Answer Logic:

Gargles are typically concentrated aqueous solutions meant to be diluted with warm water before use.

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Math Physics Chemistry Biology QUESTION #801

Question 1487

Oxidation of $\text{NO}$ in air gives:

$\text{N}_2\text{H}_4$
$\text{NH}_4^+$
$\text{NH}_3$
None✔️

Correct Answer Logic:

Oxidation of NO in air gives $\text{NO}_2$: $2\text{NO} + \text{O}_2 \rightarrow 2\text{NO}_2$. Since $\text{NO}_2$ is not listed, the answer is None.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3371

Question 1488

'Endemic' means a disease is:

Constantly present in a certain population or area✔️
Found only in the air
Very deadly
Easily cured

Correct Answer Logic:

For example, Malaria is endemic in certain tropical regions.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3592

Question 1489

The alkaloid 'Quinine', used to treat Malaria, is extracted from:

Cinchona bark✔️
Ipecac root
Opium poppy
Tea leaves

Correct Answer Logic:

Cinchona (Family: Rubiaceae) is the primary source of antimalarial alkaloids.

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Basic Mathematics QUESTION #4558

Question 1490

What is $\frac{7}{10}$ as a percentage?

$7\%$
$0.7\%$
$70\%$✔️
$710\%$

Correct Answer Logic:

$\frac{7}{10} = 0.7 = 70\%$

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Basic Mathematics QUESTION #4632

Question 1491

Simplify: $\sqrt{48}$

$4\sqrt{3}$✔️
$6\sqrt{2}$
$2\sqrt{12}$
$12\sqrt{4}$

Correct Answer Logic:

$\sqrt{48} = \sqrt{16 \times 3} = 4\sqrt{3}$

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Biology Zoology Botany QUESTION #1343

Question 1492

Erythropoietin, a hormone, is primarily produced by _________ and is involved for RBC production:

Liver
Kidney✔️
Leukocytes
None of these

Correct Answer Logic:

Erythropoietin (EPO) is a glycoprotein hormone primarily produced by peritubular interstitial cells in the cortex of the kidney (about 90%) in response to hypoxia (low oxygen levels). A small amount is produced in the liver. EPO stimulates the bone marrow to increase the production of red blood cells (erythropoiesis), thereby increasing oxygen-carrying capacity.

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Urdu QUESTION #5112

Question 1493

مسدسِ حالی کس بحر میں لکھی گئی ہے؟

بحرِ ہزج✔️
بحرِ متدارک
بحرِ کامل
بحرِ رمل

Correct Answer Logic:

مسدسِ حالی بحرِ ہزج میں لکھی گئی ہے۔

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3438

Question 1494

'Fructose' is also known as:

Grape sugar
Fruit sugar✔️
Cane sugar
Malt sugar

Correct Answer Logic:

It is the sweetest of all natural sugars.

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Boilers Mechanical Engineering QUESTION #3982

Question 1495

A 'Superheater' is placed in the path of flue gases to:

Increase the pressure of steam
Remove moisture from steam and increase its temperature✔️
Condense the steam back to water
Filter the smoke

Correct Answer Logic:

Superheating prevents condensation in steam turbines and improves thermal efficiency.

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Professional QUESTION #1811

Question 1496

Which rule of PPRA Rules 2004 explicitly states that any unauthorized breach of these rules shall amount to mis-procurement?

Rule 47
Rule 49
Rule 50✔️
Rule 51

Correct Answer Logic:

Rule 50 contains the specific provision that any unauthorized breach of the PPRA Rules 2004 shall amount to mis-procurement. This rule is concise but carries significant legal weight as it defines the threshold for regulatory violation in the procurement framework.

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Mathematics QUESTION #1294

Question 1497

If $\vec{a}\times(\vec{b}\times\vec{c}) = (\vec{a}\times\vec{b})\times\vec{c}$, what can be concluded about $\vec{a}$ and $\vec{c}$?

They are perpendicular
They are parallel✔️
Their magnitudes are equal
Their dot product is 1

Correct Answer Logic:

Expand both sides using the BAC-CAB rule. LHS: $\vec{b}(\vec{a}\cdot\vec{c})-\vec{c}(\vec{a}\cdot\vec{b})$. RHS: $\vec{a}(\vec{b}\cdot\vec{c})-\vec{b}(\vec{a}\cdot\vec{c})$. Setting equal and simplifying yields $(\vec{a}\times\vec{c})\times\vec{b}=\vec{0}$ for all $\vec{b}$, which implies $\vec{a}\times\vec{c}=\vec{0}$, meaning $\vec{a}$ and $\vec{c}$ are parallel.

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Others section QUESTION #4782

Question 1498

The Strait of Malacca serves as the main shipping channel between the Indian Ocean and which ocean?

North Pacific Ocean✔️
South Pacific Ocean
South Atlantic Ocean
Arctic Ocean

Correct Answer Logic:

The Strait of Malacca connects the Indian Ocean to the South China Sea and the Pacific Ocean. It is one of the world's most important shipping lanes.

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Pakistan Affairs QUESTION #145

Question 1499

The lower age limit for a candidate contesting senate elections is ______ years.

30✔️
35
25
40

Correct Answer Logic:

According to the Constitution of Pakistan, a person must be at least 30 years of age to be elected as a member of the Senate.

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Library Sciences QUESTION #1571

Question 1500

Which environmental condition is considered most damaging to the long-term preservation of rare books and manuscripts?

Cool temperatures between 15–18°C
Fluctuating temperature and high relative humidity (above 65%)✔️
Dim, ultraviolet-filtered lighting
Acid-free storage boxes

Correct Answer Logic:

Fluctuating temperature and high relative humidity (above 60–65%) are the most destructive environmental conditions for rare materials — accelerating acid hydrolysis, mold growth, and insect infestation. Stable cool temperatures and controlled humidity (45–55% RH) are the recommended preservation standards.

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