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MBBS QUESTION #10333

Scurvy, presenting with bleeding gums, poor wound healing, and perifollicular hemorrhages, results from vitamin C deficiency because ascorbic acid is an essential cofactor for:

Hydroxylation of proline and lysine residues during collagen synthesis✔️
Gamma-carboxylation of clotting factors
De novo purine nucleotide synthesis
Mitochondrial beta-oxidation of fatty acids

Correct Answer Logic:

Vitamin C is required as a cofactor for prolyl and lysyl hydroxylase, enzymes that hydroxylate collagen precursor residues; hydroxylation is essential for stable collagen triple-helix formation and cross-linking, explaining the connective tissue fragility, poor wound healing, and vascular bleeding seen in scurvy.

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Mathematics QUESTION #6974

Question 11022

Find the value of $\displaystyle\int_{-\pi/2}^{\pi/2}\dfrac{\sin^2 x}{1+2^x}\,dx$

$4\pi$
$\dfrac{\pi}{4}$✔️
$\dfrac{\pi}{8}$
$\dfrac{\pi}{2}$

Correct Answer Logic:

Let $I=\displaystyle\int_{-\pi/2}^{\pi/2}\dfrac{\sin^2x}{1+2^x}dx$. Use the property $\int_{-a}^a f(x)dx$: replace $x\to-x$:

$I=\displaystyle\int_{-\pi/2}^{\pi/2}\dfrac{\sin^2x}{1+2^{-x}}dx=\displaystyle\int_{-\pi/2}^{\pi/2}\dfrac{2^x\sin^2x}{1+2^x}dx$

Adding: $2I=\displaystyle\int_{-\pi/2}^{\pi/2}\sin^2x\,dx=\displaystyle\int_{-\pi/2}^{\pi/2}\dfrac{1-\cos2x}{2}dx=\dfrac{\pi}{2}$

$I=\dfrac{\pi}{4}$

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Home Economics QUESTION #6278

Question 11023

Which laundry reagent is used to neutralize residual alkalinity and remove 'yellowing' in white clothes?

Bleach
Starch
Blueing agent✔️
Fabric Softener

Correct Answer Logic:

Blueing agents add a trace of blue dye to counteract the natural yellowing of white fabrics.

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Library Sciences QUESTION #1521

Question 11024

Which of the following best describes a 'gazetteer' as a geographical reference source?

A collection of road maps for travelers
A geographical dictionary providing descriptions of places, physical features, and statistical data✔️
An atlas of historical maps
A directory of geography professors

Correct Answer Logic:

A gazetteer is a geographical dictionary or index that provides names, locations, and descriptive or statistical information about places — including cities, rivers, mountains, and regions — and is distinct from an atlas (which is a collection of maps).

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Physics QUESTION #7227

Question 11025

The dimensions of $(\mu_0 \varepsilon_0)^{1/2}$ are:

$[L^{1/2}T^{-1/2}]$
$[L^{-1}T]$✔️
$[LT^{-1}]$
$[L^{-1/2}T^{1/2}]$

Correct Answer Logic:

We know that $c = \dfrac{1}{\sqrt{\mu_0 \varepsilon_0}}$, where $c$ is the speed of light with dimension $[LT^{-1}]$.

Therefore: $\sqrt{\mu_0\varepsilon_0} = \dfrac{1}{c}$

$[\sqrt{\mu_0\varepsilon_0}] = [c^{-1}] = [L^{-1}T]$

So $(\mu_0\varepsilon_0)^{1/2}$ has dimensions $[L^{-1}T]$.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3098

Question 11026

Which heart chamber pumps oxygenated blood to the entire body via the Aorta?

Right Atrium
Right Ventricle
Left Atrium
Left Ventricle✔️

Correct Answer Logic:

The Left Ventricle has the thickest muscular wall to generate high pressure for systemic circulation.

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Reading and Writing (Module-1) QUESTION #5378

Question 11027

While researching a topic, a student has taken the following notes: Earthquakes start at a point called a 'focus' and spread out as seismic waves. Two types of seismic waves that travel beneath the surface are P waves and S waves. P waves compress and expand the ground, while S waves move it side to side. Both types of waves travel beneath the surface and cause the ground to move. The student wants to emphasize a similarity between P waves and S waves. Which choice most effectively uses relevant information from the notes to accomplish this goal?

P waves and S waves both travel beneath Earth’s surface, causing the ground to move.✔️
P waves travel away from an earthquake’s starting point at a higher rate of speed than do S waves.
Spreading out from the focus of an earthquake, P waves move the ground backward and forward.
Although P waves and S waves start at the same point, they behave very differently.

Correct Answer Logic:

Option A highlights what the waves have in common, using the word 'both' to emphasize the similarity.

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Psychology QUESTION #9714

Question 11028

Which school of psychology focuses on the adaptive functions of mental processes and behavior, drawing on Charles Darwin's theory of evolution?

Structuralism
Functionalism✔️
Behaviorism
Gestalt psychology

Correct Answer Logic:

Functionalism, associated with William James, focuses on how mental processes help organisms adapt to their environment. Unlike Structuralism (which asked what the mind is made of), Functionalism asked what the mind does and why. It was directly influenced by Darwin's idea that mental traits, like physical traits, evolved because they served adaptive functions.

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Pakistan Affairs QUESTION #151

Question 11029

What was the primary objective of the Home Rule League founded by Annie Besant?

To advocate for complete independence
To establish Home Rule as an auxiliary to the National Congress✔️
To promote social and educational reforms
None of these

Correct Answer Logic:

The League aimed to mobilize Indian opinion for self-government within the British Empire.

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Math (Module-1) QUESTION #5457

Question 11030

A group of students voted on five after-school activities. The bar graph (not shown) displays the number of students who chose each activity. Based on the graph, how many students chose activity 3?

25
39
48✔️
50

Correct Answer Logic:

The bar for activity 3 reaches 48 on the vertical axis.

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English QUESTION #8480

Question 11031

Select the word OPPOSITE in meaning to: Pertinent

irrelevant✔️
quick
proper
refer

Correct Answer Logic:

Pertinent means relevant; opposite is irrelevant.

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Biology Zoology Botany QUESTION #10825

Question 11032

In female fishes, expression of FSH (follicle-stimulating hormone) is associated predominantly with:

Vitellogenesis
Recruitment of new oocyte generation✔️
Spermiation
Both A and B

Correct Answer Logic:

In female fish, FSH is predominantly associated with recruitment of new oocyte cohorts (early folliculogenesis) — initiating the development of a new group of oocytes from the ovarian reserve. LH is more important for vitellogenesis (yolk deposition) and ovulation in later stages. Spermiation is the release of sperm in males, not relevant to females. The two-gonadotropin model (FSH for recruitment, LH for maturation) is well established in fish reproductive endocrinology.

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Bio-Technology QUESTION #10597

Question 11033

Itaconic acid is biosynthetically derived from which TCA cycle intermediate via decarboxylation?

Oxaloacetate
Succinate
cis-Aconitate✔️
α-Ketoglutarate

Correct Answer Logic:

Itaconic acid (methylenesuccinic acid) is produced from cis-aconitate by the enzyme cis-aconitate decarboxylase, encoded by the cadA gene in Aspergillus terreus. Cis-aconitate is a TCA cycle intermediate formed from citrate by aconitase. By diverting flux from cis-aconitate before it can be converted to isocitrate, itaconate accumulates. It is industrially important as a monomer for bioplastics and resins.

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Geology QUESTION #10658

Question 11034

In lithostratigraphic classification, strata bounded above and below by unconformities are classified as:

Allostratigraphic units✔️
Biostratigraphic units
Chronostratigraphic units
None of these

Correct Answer Logic:

Allostratigraphy classifies strata based on bounding discontinuities (unconformities) rather than lithology, fossils, or time. Allostratigraphic units (alloformations, allomembers, allogroups) are bounded by mappable discontinuities. This classification system (NACSN, 1983) is particularly useful in Quaternary geology and sequence stratigraphy where unconformities are the primary correlatable surfaces, independent of the lithology of the enclosed strata.

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Physics QUESTION #1024

Question 11035

A ball of mass 0.5 kg is dropped from 40 m, hits the ground and rises to 10 m. The impulse imparted during collision is (Take $g = 9.8\ \text{m/s}^2$):

84 NS
21 NS✔️
7 NS

Correct Answer Logic:

Velocity before hitting: $v_1 = \sqrt{2\times9.8\times40} = 28\ \text{m/s}$ (downward). Velocity after: $v_2 = \sqrt{2\times9.8\times10} = 14\ \text{m/s}$ (upward). Impulse $= m(v_2-(-v_1)) = 0.5\times(14+28) = 0.5\times42 = 21\ \text{NS}$.

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English Literature QUESTION #10722

Question 11036

Holy Sonnets was written by:

Marlowe
Donne✔️
Spenser
Johnson

Correct Answer Logic:

John Donne wrote the Holy Sonnets (also called Divine Meditations), a collection of 19 sonnets on themes of mortality, sin, divine love, and salvation. Famous lines include 'Death, be not proud' (Sonnet 10) and 'Batter my heart, three-person'd God' (Sonnet 14). Donne is the foremost Metaphysical poet, and the Holy Sonnets are his greatest devotional achievement.

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Education QUESTION #11683

Question 11037

The National Education Policy of 1970 was formulated under the chairmanship of:

Fazal ur Rehman
S.M. Sharif
Noor Khan✔️
None of these

Correct Answer Logic:

The National Education Policy 1970 was prepared under the leadership of Air Marshal Noor Khan, who served as the Federal Education Minister at the time under the Yahya Khan government. This policy focused on expanding access and improving educational quality.

Correct Answer: C — Noor Khan.

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Biology Zoology Botany QUESTION #10840

Question 11038

Which of the following animals is strictly a carnivore?

Mammals (all)
Camel
Goat
Lion✔️

Correct Answer Logic:

Lions (Panthera leo) are obligate (strict) carnivores — they exclusively eat meat and rely on animal protein to meet all their nutritional requirements. They lack the digestive enzymes needed to derive adequate nutrition from plant matter. Camels and goats are herbivores/omnivores. Not all mammals are carnivores — most are herbivores or omnivores. Lions are apex predators in savannah ecosystems.

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English QUESTION #8489

Question 11039

Select the word SIMILAR in meaning to: Exemplify

Over
Illustrate✔️
Answer
Summary

Correct Answer Logic:

Exemplify means to illustrate by example.

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Political Science QUESTION #6673

Question 11040

Who authored the work 'On Liberty'?

John Locke
John Stuart Mill✔️
Isaiah Berlin
None of these

Correct Answer Logic:

J.S. Mill's 'On Liberty' is a classic defense of individual freedom from state interference.

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