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Accounting & Finance QUESTION #6194

Question 8321

If the 'Retention Ratio' ($b$) is $0.70$, what is the 'Dividend Payout Ratio'?

0.7
1
0.3✔️
1.3

Correct Answer Logic:

Payout Ratio is $1 - \text{Retention Ratio}$. $1 - 0.70 = 0.30$ [cite: 46].

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Molecular Biology / Bioinformatics / Biochemistry QUESTION #11102

Question 8322

Primary carboxylation in $\text{C}_3$ plants is carried out by which enzyme?

Pyruvate carboxylase
Succinic dehydrogenase
Hexokinase
RuBP carboxylase oxygenase (RuBisCO)✔️

Correct Answer Logic:

In $\text{C}_3$ plants, primary $\text{CO}_2$ fixation is catalysed by RuBisCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase). RuBisCO adds $\text{CO}_2$ to ribulose-1,5-bisphosphate (RuBP, a $\text{C}_5$ compound) to produce two molecules of 3-phosphoglycerate (3-PGA, a $\text{C}_3$ compound) — hence the name $\text{C}_3$ plants. In $\text{C}_4$ plants, the primary carboxylation enzyme is PEP carboxylase (in mesophyll cells), which is ~60× more efficient at fixing $\text{CO}_2$.

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MBBS QUESTION #10273

Question 8323

A patient shows flaccid weakness, absent or reduced deep tendon reflexes, marked muscle wasting, and fasciculations in the affected muscles. This clinical pattern is most consistent with a lesion of:

An upper motor neuron
A lower motor neuron (anterior horn cell, root, or peripheral nerve)✔️
The basal ganglia
The cerebellum

Correct Answer Logic:

Lower motor neuron lesions disconnect muscle from its trophic and reflex-arc innervation, producing flaccid paralysis, hyporeflexia/areflexia, prominent wasting (denervation atrophy), and fasciculations — as seen in poliomyelitis, peripheral neuropathy, or motor neuron disease affecting anterior horn cells.

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English QUESTION #8515

Question 8324

The opposite of 'amateur' is:

Mature
Professional✔️
Unskilled
Trained

Correct Answer Logic:

Amateur is non-professional; opposite is professional.

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English QUESTION #8341

Question 8325

Tick the synonym: To disfigure (Efface/Deface/Face/Beauty)

Efface
Deface✔️
Face
Beauty

Correct Answer Logic:

'Deface' means to spoil the appearance of.

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Pakistan Affairs QUESTION #9096

Question 8326

From which country did Pakistan purchase the Gwadar port?

Kuwait
Iran
Oman✔️
None of these

Correct Answer Logic:

Pakistan purchased Gwadar from Oman in 1958.

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Agronomy QUESTION #2031

Question 8327

The most significant agronomic advantage of including a legume crop in a rotation sequence is:

It produces allelopathic compounds that suppress all subsequent weeds
It fixes atmospheric nitrogen through symbiosis with Rhizobium bacteria, reducing nitrogen fertilizer requirement for the subsequent crop✔️
It always produces higher economic yield than cereal crops
It prevents all fungal diseases in the subsequent cereal crop

Correct Answer Logic:

Legumes host Rhizobium or Bradyrhizobium bacteria in root nodules that fix atmospheric $N_2$ into plant-available $NH_4^+$. The residual nitrogen from legume roots and residues (typically 50–200 kg N/ha depending on species) benefits the following crop, reducing synthetic N fertilizer needs.

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Chemistry QUESTION #7810

Question 8328

Acetic acid can be prepared by hydrolysis of:

Ethanol
Ethene
Methanoic acid
Methyl cyanide✔️

Correct Answer Logic:

Hydrolysis of methyl cyanide (acetonitrile, CH₃CN) yields acetic acid: $\mathrm{CH_3CN + 2H_2O \rightarrow CH_3COOH + NH_3}$.

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Psychology QUESTION #9728

Question 8329

Abraham Maslow's hierarchy of needs arranges human motivations in a pyramid. Which level must be satisfied before the need for love and belonging can be meaningfully pursued?

Physiological needs
Safety needs✔️
Esteem needs
Self-actualization

Correct Answer Logic:

In Maslow's hierarchy, safety needs (security, stability, freedom from fear) must be met before social needs (love, belonging, intimacy) become motivating priorities. The hierarchical order from bottom to top is: (1) Physiological, (2) Safety, (3) Love/Belonging, (4) Esteem, and (5) Self-actualization. Lower-level deficiency needs must be adequately satisfied before higher-level growth needs emerge.

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Civil Engineering QUESTION #6572

Question 8330

Alloys containing more than $2.1\%$ carbon by weight are classified as:

Steel
Cast Iron✔️
Pig Iron
Wrought Iron

Correct Answer Logic:

Carbon content defines the iron–carbon alloy type:

Steel: $0.008\% - 2.1\%$ C
Cast Iron: $> 2.1\%$ C (typically $2.1\% - 4\%$)

Cast iron is brittle and has high compressive strength.

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Logical Reasoning QUESTION #3951

Question 8331

It is a common scientific belief that a full-scale nuclear conflict could _____ enough debris and soot to obscure the sun and cause a global freeze.

billow✔️
extinguish
generate
duplicate

Correct Answer Logic:

2

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Physics QUESTION #1160

Question 8332

The viscosity of a fluid in motion is 1 Poise. What will be its viscosity (in Poise) when the fluid is at rest?

0.5
1✔️
2

Correct Answer Logic:

Viscosity is an intrinsic property of a fluid that depends on its temperature and nature, not on its state of motion or rest. A fluid's viscosity remains the same whether it is flowing or stationary. The viscosity is still 1 Poise at rest.

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Chemistry QUESTION #7376

Question 8333

Which pair of d-orbitals has electron density distributed along the axes (axial orbitals)?

$d_{z^2},\ d_{x^2-y^2}$✔️
$d_{xy},\ d_{x^2-y^2}$
$d_{z^2},\ d_{xz}$
$d_{xz},\ d_{yz}$

Correct Answer Logic:

d-orbital classification:

Axial orbitals (lobes along axes): $d_{z^2}$ and $d_{x^2-y^2}$
Non-axial orbitals (lobes between axes): $d_{xy}$, $d_{xz}$, $d_{yz}$

The $d_{z^2}$ orbital has lobes along the z-axis with a torus in the xy-plane. The $d_{x^2-y^2}$ orbital has lobes along both x and y axes. These two are directly involved in ligand interactions in octahedral complexes (eg set).

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General Knowledge QUESTION #8739

Question 8334

The Prime Meridian (0° longitude) passes through which country?

Britain✔️
America
Switzerland
Finland

Correct Answer Logic:

The Prime Meridian runs through Greenwich, London, UK.

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Boilers Mechanical Engineering QUESTION #2388

Question 8335

The standard second-order closed-loop transfer function is written as:

$Y(s) = \frac{2\zeta\omega_n}{s^2+2\zeta\omega_n s+\omega_n^2}$
$Y(s) = \frac{\omega_n^2}{s^2+2\zeta\omega_n s+\omega_n^2}$✔️
$Y(s) = \frac{\omega_n^2}{s^2+\omega_n^2}$
$Y(s) = \frac{1}{s^2+2\zeta s+1}$

Correct Answer Logic:

The standard second-order system: $Y(s)=\frac{\omega_n^2}{s^2+2\zeta\omega_n s+\omega_n^2}$ where $\omega_n$ is the undamped natural frequency and $\zeta$ is the damping ratio. Poles: $s=-\zeta\omega_n\pm\omega_n\sqrt{\zeta^2-1}$.

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General Knowledge QUESTION #8614

Question 8336

Which district of Punjab is the largest in terms of area?

Bahawalpur
D.G. Khan✔️
Faisalabad
Lahore

Correct Answer Logic:

Dera Ghazi Khan is the largest district by area in Punjab.

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Academic/Professional (Social Sciences) QUESTION #10094

Question 8337

The functionalist perspective views education primarily as a mechanism for:

Reproducing class inequality
Social integration and value transmission✔️
Political indoctrination only
Individual rebellion

Correct Answer Logic:

Functionalists see education as instilling shared values and integrating individuals into society.

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Chemistry QUESTION #4362

Question 8338

Terminal alkynes show acidic character due to:

Terminal carbon atoms are $sp$ hybridized✔️
Terminal carbon atoms are $sp^2$ hybridized
Terminal carbon atoms are $sp^3$ hybridized
Terminal carbon atoms show hydrogen bonding

Correct Answer Logic:

In terminal alkynes ($R-C\equiv CH$), the terminal carbon is $sp$ hybridized (50% s-character). Higher s-character means the bonding electrons are held closer to the nucleus, making the $C-H$ bond more polar and the hydrogen more acidic ($pK_a \approx 25$).

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Chemistry QUESTION #1069

Question 8339

Which one of the following reactions does NOT belong to Lassaigne's test?

$\text{Na} + \text{X} \xrightarrow{\Delta} \text{NaX}$
$2\text{CuO} + \text{C} \xrightarrow{\Delta} 2\text{Cu} + \text{CO}_2$✔️
$\text{Na} + \text{C} + \text{N} \xrightarrow{\Delta} \text{NaCN}$
$2\text{Na} + \text{S} \xrightarrow{\Delta} \text{Na}_2\text{S}$

Correct Answer Logic:

Lassaigne's test involves fusing the organic compound with sodium metal to convert covalent elements (N, S, halogens) into ionic sodium salts (NaCN, Na$_2$S, NaX). The reaction $2\text{CuO} + \text{C} \to 2\text{Cu} + \text{CO}_2$ is the copper oxide test used to detect carbon/hydrogen, and does NOT belong to Lassaigne's test.

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Mathematics QUESTION #4116

Question 8340

Let $W$ be the subspace of all symmetric $2 \times 2$ matrices. What is $\dim(W)$?

$2$
$3$✔️
$4$
$6$

Correct Answer Logic:

Symmetric $2 \times 2$ matrices have form $\begin{pmatrix} a & b \ b & c \end{pmatrix}$. Basis: $\begin{pmatrix} 1 & 0 \ 0 & 0 \end{pmatrix}$, $\begin{pmatrix} 0 & 1 \ 1 & 0 \end{pmatrix}$, $\begin{pmatrix} 0 & 0 \ 0 & 1 \end{pmatrix}$. Dimension is 3.

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