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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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Chemistry QUESTION #1109

Question 2762

Higher yield of NO in $\text{N}_2(\text{g})+\text{O}_2(\text{g})\rightleftharpoons 2\text{NO}(\text{g})$, $\Delta H=+180.7\ \text{kJ mol}^{-1}$:

B, C, D only
A, C, D only✔️
A, D only
B, C only

Correct Answer Logic:

Reaction is endothermic ($\Delta H>0$). By Le Chatelier's principle: (A) Higher temperature shifts equilibrium forward (endothermic) → higher NO yield ✓. (B) Lower temperature shifts backward → less NO ✗. (C) Higher [N$_2$] shifts equilibrium forward → more NO ✓. (D) Higher [O$_2$] shifts equilibrium forward → more NO ✓. Correct: A, C, D = option (2).

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Bio-Technology QUESTION #10592

Question 2763

A PID controller adjusts a manipulated variable based on:

Proportional, Integral, and Derivative terms of the error signal $\varepsilon$✔️
The current set point value only
Open-loop feed-forward predictions of substrate consumption
Only the derivative of the error to predict future deviations

Correct Answer Logic:

The PID controller output is: $y = y_0 + K_P\left[\varepsilon + \dfrac{1}{\tau_I}\int \varepsilon\, dt + \tau_D \dfrac{d\varepsilon}{dt}\right]$ where:

P (Proportional): responds to current error magnitude
I (Integral): eliminates steady-state offset by integrating past error
D (Derivative): anticipates future error from the rate of change

Tuning $K_P$, $\tau_I$, and $\tau_D$ is done experimentally (e.g. Ziegler-Nichols method).

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Civil Engineering QUESTION #2132

Question 2764

In transportation engineering, the California Bearing Ratio (CBR) test is used to:

Measure the compressive strength of subgrade soil for designing airport runways only
Evaluate the bearing capacity of subgrade and sub-base materials relative to a standard crushed stone material — the CBR value is used as input to empirical pavement thickness design methods (IRC, AASHTO) to determine required pavement structure depth✔️
Measure the permeability of road base materials for drainage design
Determine the optimum moisture content of subgrade soils for compaction

Correct Answer Logic:

CBR = (load to cause 2.5mm or 5.0mm penetration in test soil / load for same penetration in standard crushed stone) × 100%. It was developed by California Division of Highways and adopted worldwide for flexible pavement design. High CBR (>80%): excellent subgrade; medium (20–50%): fair; low (<5%): poor, requiring thick pavement. It is used in IRC:37, AASHTO, and most national pavement design guides.

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Boilers Mechanical Engineering QUESTION #2410

Question 2765

The Weber number $We$ governs flows where surface tension forces are important. It is defined as:

$We = \rho L V^2 / \sigma$ — ratio of inertial to surface tension forces✔️
$We = \sigma / (\rho L V^2)$
$We = \mu V / \sigma$
$We = \sigma L / (\rho V^2)$

Correct Answer Logic:

Weber number: $We=\rho LV^2/\sigma$ where $\sigma$ is surface tension (N/m). Important in droplet formation, bubble dynamics, and thin film flow.

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Psychology QUESTION #9830

Question 2766

Figural aftereffects are distortions that arise from:

Figures held in memory
Ambiguity of figures
Prolonged fixation of figures✔️
Oscillation of attention

Correct Answer Logic:

Figural aftereffects occur after prolonged fixation on a figure. After staring at an inspection figure and shifting gaze to a test figure, the test figure appears displaced or distorted due to neural adaptation in the visual cortex.

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Chemistry QUESTION #5571

Question 2767

Arrange the following amines in increasing order of basicity: (a) vinylamine, (b) allylimine (secondary, =NH), (c) compound with $NH_2$ and $=NH$ groups, (d) $N$-methylamine

(b) < (a) < (d) < (c)✔️
(d) < (b) < (a) < (c)
(a) < (b) < (c) < (d)
(b) < (a) < (c) < (d)

Correct Answer Logic:

Basicity depends on electron availability on N. Imine-type N (sp² hybridized, as in =NH) is less basic than amine-type N (sp³). Among aliphatic amines, alkyl groups increase basicity. The increasing basicity order from the JEE 2018 question: (b) < (a) < (d) < (c), where the aliphatic secondary amine (c) is most basic.

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Home Economics QUESTION #6278

Question 2768

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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Law QUESTION #9521

Question 2769

A civil suit is decreed in favour of A. B files an appeal, which is admitted. During the appeal, both parties enter a compromise settling all claims. The appellate Court is asked to pass a decree in terms of the compromise under Order XXIII Rule 3. B later argues the compromise was made under coercion and seeks to have it set aside. How should B proceed?

Apply within the same proceedings before the appellate Court to show that the compromise was not lawful, since Order XXIII Rule 3 CPC requires the Court to be satisfied that the compromise is lawful before recording it✔️
File a revision petition before the High Court
File a criminal complaint for coercion
File a separate suit to set aside the compromise

Correct Answer Logic:

Order XXIII Rule 3 CPC requires the Court to be satisfied that a compromise is not unlawful before recording it. If B can show that the compromise was made under coercion or duress, he can raise this before the same Court which was asked to pass the compromise decree. The Court investigates the validity of the compromise before making it a rule of the Court.

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Education QUESTION #6881

Question 2770

A school implements a reward system in which an entire class earns or loses privileges based on the behavior of individual members. This structure is BEST described as which type of intervention?

Reality Therapy
Student Team Learning
Group Contingency✔️
Logical Consequences

Correct Answer Logic:

Group contingencies are behavioral structures in which rewards or penalties are distributed to a group based on the behavior of individuals within that group. Research supports their effectiveness in remediating misbehavior by enlisting peer influence and social responsibility as behavioral incentives.

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Math Physics Chemistry Biology QUESTION #4292

Question 2771

Why are thick filaments unable to bind with thin filaments in a relaxed muscle fiber?

Actin blocks the myosin binding site
Tropomyosin blocks the myosin binding site✔️
Troponin blocks the myosin binding site
Tropomyosin blocks the troponin binding site

Correct Answer Logic:

In a relaxed muscle, tropomyosin covers the myosin-binding sites on actin filaments, preventing cross-bridge formation. Calcium ions ($Ca^{2+}$) are required to move tropomyosin away.

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Ability / HR / Governance / Special Education QUESTION #1899

Question 2772

Under Rule 6(4) an Inquiry Officer must hear a case from day to day. In case of adjournment what is normally the maximum period of a single adjournment?

3 days
1 month
1 week✔️
2 weeks

Correct Answer Logic:

Rule 6(4) provides that normally no adjournment shall be for more than a week and every adjournment with reasons shall be reported forthwith to the authorized officer.

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Dairy Food Science and Technology QUESTION #5888

Question 2773

Which milk protein fraction is most responsible for heat stability of milk?

$\beta$-casein due to its hydrophobic character
$\kappa$-casein due to its surface-active glycopeptide moiety stabilizing micelles✔️
$\alpha$-lactalbumin due to its calcium-binding domain
$\beta$-lactoglobulin due to disulfide bonding

Correct Answer Logic:

$\kappa$-casein, located on the outer surface of casein micelles, provides steric and electrostatic stabilization through its negatively charged hydrophilic glycomacropeptide (GMP) tail. Its removal by chymosin or denaturation during heating ($>70^{\circ}\text{C}$) destabilizes micelles.

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Islamic Studies QUESTION #214

Question 2774

Which leader is known for strategic brilliance at the Battle of Yarmouk?

Ali ibn Abi Talib
Abu Ubaidah
Sa'd ibn Abi Waqqas
Khalid ibn al-Walid✔️

Correct Answer Logic:

Khalid ibn al-Walid's tactics were decisive in the defeat of the Byzantine forces.

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Islamic Studies QUESTION #643

Question 2775

In the battle of Tabuk the Holy Prophet (ﷺ) led an army containing ________ men.

40,000
30,000✔️
50,000
None of these

Correct Answer Logic:

The Muslim army for the expedition to Tabuk consisted of 30,000 soldiers.

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Psychology QUESTION #9909

Question 2776

Which of the following is a dimension of visual experience?

Loudness
Pitch
Timbre
Brightness✔️

Correct Answer Logic:

Dimensions of visual experience include hue, brightness (light intensity), and saturation. Loudness, pitch, and timbre are dimensions of auditory experience. Brightness is the visual equivalent of loudness in audition.

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English QUESTION #2687

Question 2777

Identify the correct modal for 'prohibition': 'You ___ park your car in front of the gate.'

could not
must not✔️
may not
need not

Correct Answer Logic:

'Must not' is used to express a strong prohibition or rule.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3560

Question 2778

'Garlic' is known for its sulfur-containing constituent called:

Allicin✔️
Reserpine
Eugenol
Atropine

Correct Answer Logic:

Allicin provides the medicinal properties and odor of garlic.

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Nursing QUESTION #9290

Question 2779

In a patient with liver cirrhosis, the nurse observes flapping tremor of hands when arms are outstretched. This sign is called:

Chvostek's sign
Asterixis (hepatic flap)✔️
Trousseau's sign
Kernig's sign

Correct Answer Logic:

Asterixis (also called hepatic flap or liver flap) is a characteristic finding in:

Hepatic encephalopathy (liver disease)
Uremic encephalopathy (renal failure)
CO₂ retention (respiratory failure)

It is caused by metabolic disturbance affecting motor control in the brain. Tested by asking the patient to extend wrists with arms outstretched — irregular, flapping tremor results.

Other important signs to differentiate:

Chvostek's sign: Facial muscle twitching on tapping cheek → hypocalcemia
Trousseau's sign: Carpal spasm with BP cuff inflation → hypocalcemia
Kernig's sign: Resistance to knee extension with hip flexed → meningitis

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Accounting & Finance QUESTION #6233

Question 2780

Which ethical principle prevents an auditor from using client information for personal gain?

Integrity
Professional Behavior
Confidentiality✔️
Due Care

Correct Answer Logic:

Confidentiality dictates that the auditor should not disclose info without permission nor use it for personal benefit.

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