Reading Mode - Questions

Agronomy QUESTION #2103

The process of vernalization in cereal crops (wheat, barley) refers to:

The application of external nitrogen fertilizer to promote vegetative growth in spring
The acquisition of competence to flower by exposure to a prolonged period of cold temperature (1–10°C for 4–8 weeks), which epigenetically silences floral repressor genes (VRN2) and activates floral promoters (VRN1) — ensuring reproductive development occurs in spring rather than autumn✔️
Hardening of seedlings by gradual exposure to low temperatures to improve frost tolerance
The process of selecting winter-hardy genotypes for spring planting

Correct Answer Logic:

Vernalization is a cold-temperature requirement for flowering in winter annual crops. Epigenetically, cold induces chromatin remodeling (H3K27me3 modifications) that permanently silences FLC (in Arabidopsis) or VRN2 (in cereals), derepressing floral integrator genes. Without vernalization, winter wheat planted in spring remains vegetative. The VRN1, VRN2, VRN3 gene system controls vernalization response and is a major target in breeding for climate adaptation.

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English QUESTION #509

Question 2882

GRIM

Gratis
Restless
Severe✔️
Grater

Correct Answer Logic:

Grim means forbidding or severe

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3521

Question 2883

'Anaphylaxis' is:

A mild skin rash
A severe, potentially life-threatening systemic allergic reaction✔️
A type of plant
A medicine

Correct Answer Logic:

Anaphylactic shock requires immediate medical attention (usually Epinephrine).

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General Knowledge QUESTION #2593

Question 2884

In the decimal (base-10) number system, how many unique digit symbols are available for use?

8 digits (0 to 7)
9 digits (1 to 9)
10 digits (0 to 9)✔️
16 digits (0 to 9 and A to F)

Correct Answer Logic:

In the decimal system, there are 10 possible numbers you can use ranging from zero to nine (0, 1, 2, 3, 4, 5, 6, 7, 8, 9). This is why it is called 'base-10' — it has a base of ten distinct symbols.

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Mechanical Engineering QUESTION #2532

Question 2885

The equation of motion for the center of mass G of a rigid body system of total mass $m$ acted on by external forces is:

$\sum\mathbf{F}_{ext} = m\,\mathbf{a}_G$✔️
$\sum\mathbf{F}_{ext} = I_G\,\boldsymbol{\alpha}$
$\sum\mathbf{F}_{ext} = \mathbf{H}_G$
$\sum\mathbf{F}_{ext} = m\,\boldsymbol{\omega}\times\mathbf{v}_G$

Correct Answer Logic:

Newton's law for the center of mass: $\sum\mathbf{F}_{ext}=m\mathbf{a}_G$, regardless of internal forces.

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General Science and Ability QUESTION #263

Question 2886

The heavy water is:

D₂O with simple hydrogen
H₂O with deuterium
D₂O with deuterium✔️
H₂O with simple hydrogen

Correct Answer Logic:

Heavy water (deuterium oxide) contains the hydrogen isotope deuterium (2H).

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Professional QUESTION #1860

Question 2887

Does acting charge appointment confer any vested right for regular promotion to the post?

Yes, after one year
Yes, after two years
No✔️
Yes, if approved by FPSC

Correct Answer Logic:

Rule 8-B(7) explicitly states that acting charge appointment shall not confer any vested right for regular promotion to the post held on acting charge basis.

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Chemistry QUESTION #1105

Question 2888

Which among the following electronic configurations belong to main group elements? A. [Ne]3s$^1$ B. [Ar]3d$^3$4s$^2$ C. [Kr]4d$^{10}$5s$^2$5p$^5$ D. [Ar]3d$^{10}$4s$^1$ E. [Rn]5f$^0$6d$^2$7s$^2$

D and E only
A, C and D only
B and E only
A and C only✔️

Correct Answer Logic:

Main group elements have their valence electrons in s or p orbitals only. A: [Ne]3s$^1$ = Na (Group 1, s-block) ✓. B: [Ar]3d$^3$4s$^2$ = Vanadium (d-block, transition metal) ✗. C: [Kr]4d$^{10}$5s$^2$5p$^5$ = Iodine (Group 17, p-block) ✓. D: [Ar]3d$^{10}$4s$^1$ = Cu (d-block) ✗. E: [Rn]5f$^0$6d$^2$7s$^2$ = Th (d/f-block) ✗. Main group: A and C only.

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Physics QUESTION #4395

Question 2889

If the horizontal range of a projectile becomes half of its maximum possible horizontal range, the probable angle of projection is:

$15°$✔️
$30°$
$45°$
$60°$

Correct Answer Logic:

Maximum range occurs at $45°$: $R_{max} = \dfrac{v^2}{g}$. Range at angle $\theta$: $R = \dfrac{v^2\sin2\theta}{g}$. For $R = \dfrac{R_{max}}{2}$: $\sin2\theta = \dfrac{1}{2}$, so $2\theta = 30°$ or $150°$, giving $\theta = 15°$ or $75°$. The smallest angle is $15°$.

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Professional QUESTION #1794

Question 2890

Under Rule 19 of PPRA Rules 2004, a bidder found involved in corrupt and fraudulent practices shall be blacklisted and cross debarred for a maximum period of how many years?

Three years
Five years
Ten years✔️
Fifteen years

Correct Answer Logic:

Rule 19(1)(a) specifies that a bidder established to have engaged in corrupt and fraudulent practices shall be blacklisted and cross debarred from participation in any public procurement or disposal proceedings for a period not exceeding ten years.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3042

Question 2891

A 'Light-resistant' container protects the drug from:

Air
Moisture
Actinic (UV) light✔️
Temperature

Correct Answer Logic:

Light-resistant (usually amber) containers prevent photodegradation.

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Basic Mathematics QUESTION #2809

Question 2892

What is $35\%$ of 480?

152
162
168✔️
172

Correct Answer Logic:

$35\% \text{ of } 480 = \dfrac{35}{100} \times 480 = \dfrac{35 \times 480}{100} = \dfrac{16800}{100} = 168$.

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Commerce QUESTION #1212

Question 2893

__________ is a systematic examination of the books and records of a business.

Auditing✔️
Vouching
Verification
Checking

Correct Answer Logic:

Auditing is defined as the systematic and independent examination of books of accounts, documents, records, and financial statements of an organization. Its purpose is to enable the auditor to express an opinion on the true and fair view of the financial statements. Vouching and verification are procedures within an audit.

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Biology QUESTION #4219

Question 2894

Lamarck theory of evolution was rejected experimentally by:

Earnest Hackle
Charles Darwin
August Wiseman✔️
Thomas R Malthus

Correct Answer Logic:

August Weismann rejected Lamarck's theory experimentally.

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Therapeutics and Patient Care QUESTION #3888

Question 2895

A 50-year-old male treated for pitting oedema of the ankles subsequently develops gynaecomastia and erectile dysfunction. Which diuretic is most likely responsible for these endocrine adverse effects?

Hydrochlorothiazide
Furosemide
Spironolactone✔️
Triamterene

Correct Answer Logic:

Spironolactone is a mineralocorticoid antagonist with anti-androgenic effects. Its adverse effects include gynaecomastia, menstrual irregularities, and erectile dysfunction.

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Biology QUESTION #522

Question 2896

Humming birds belong to the category

Heterotherms✔️
Endotherms
Ectotherms
None of these

Correct Answer Logic:

Hummingbirds are heterotherms (can vary body temperature)

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Reading and Writing (Module-1) QUESTION #5434

Question 2897

In Mansfield's "The Young Girl," the narrator describes a 17-year-old. Mansfield contrasts pleasant appearance with unpleasant attitude. Which quotation best illustrates this contrast?

"I heard her murmur, 'I can't bear flowers on a table.' They had evidently been giving her intense pain..."
"While we waited she took out a little gold powder-box... and dabbed her lovely nose."✔️
"I saw... she couldn't stand this place... she jumped up... while I went through the vulgar act of paying."
"She didn't even take her gloves off. She lowered her eyes and drummed on the table..."

Correct Answer Logic:

Dabbing her "lovely nose" (pleasant appearance) after loathing the puff (unpleasant attitude) shows contrast.

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Mechanical Engineering QUESTION #2483

Question 2898

The velocity of a node B of a driver link in rotational motion (angular velocity $\omega = \dot{\phi}$, link length $L_{AB}$) is given by:

$v_{Bx} = -L_{AB}\dot{\phi}\sin\phi,\quad v_{By} = L_{AB}\dot{\phi}\cos\phi$✔️
$v_{Bx} = L_{AB}\dot{\phi}\cos\phi,\quad v_{By} = L_{AB}\dot{\phi}\sin\phi$
$v_{Bx} = L_{AB}\dot{\phi}^2\cos\phi,\quad v_{By} = -L_{AB}\dot{\phi}^2\sin\phi$
$v_{Bx} = -L_{AB}\ddot{\phi}\cos\phi,\quad v_{By} = L_{AB}\ddot{\phi}\sin\phi$

Correct Answer Logic:

Differentiating position equations $x_B=x_A+L_{AB}\cos\phi$ and $y_B=y_A+L_{AB}\sin\phi$ with respect to time: $v_{Bx}=-L_{AB}\dot{\phi}\sin\phi$ and $v_{By}=L_{AB}\dot{\phi}\cos\phi$.

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