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Chemistry QUESTION #427

Question 2141

__________ serve as carriers of heredity from one generation to the other.

Lipids
Caseins
Formaldehydes
Nucleoproteins✔️

Correct Answer Logic:

DNA and RNA (nucleoproteins) carry genetic information

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Physics QUESTION #1173

Question 2142

Alpha particles and electrons having the same energy — their associated De Broglie wavelengths are:

Equal
Longer than electrons (alpha has longer wavelength)
Smaller than electrons (alpha has shorter wavelength)✔️
None of these

Correct Answer Logic:

De Broglie wavelength: $\lambda = \frac{h}{\sqrt{2mE}}$. At the same kinetic energy $E$, $\lambda \propto \frac{1}{\sqrt{m}}$. Since $m_\alpha \gg m_e$ (alpha particle is ~7294 times heavier), $\lambda_\alpha \ll \lambda_e$. So alpha particles have a much shorter De Broglie wavelength than electrons at the same energy.

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Education QUESTION #1474

Question 2143

According to Abd Halim Hj. Mat Diah (1989), Islamic education is a process that shapes Muslims based on:

The teachings of philosophers
The teachings of Islam✔️
The teachings of caliphs
The teachings of scientists

Correct Answer Logic:

Abd Halim Hj. Mat Diah defined Islamic education as a process for all under the purposeful guidance of educators who shape Muslims based on the teachings of Islam.

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CISA QUESTION #1783

Question 2144

What is the primary function of an audit charter?

To formally engage external auditors for an engagement
To delegate responsibility, authority, and accountability for auditing✔️
To authorize the formation of an audit committee
To provide a detailed step-by-step audit plan

Correct Answer Logic:

The audit charter exists to formally grant the auditor the right to conduct audits. It delegates responsibility, authority, and accountability to the audit function. It is the foundational document that legitimizes the auditor's access and activities within the organization.

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Mathematics QUESTION #1276

Question 2145

The order of the cyclic subgroup generated by $\bar{6}$ in $\mathbb{Z}_{18}$ is:

2
3✔️
6
9

Correct Answer Logic:

The order of $\bar{a}$ in $\mathbb{Z}_n$ is $\dfrac{n}{\gcd(n,a)}$. Here $n=18$, $a=6$: order $=\dfrac{18}{\gcd(18,6)}=\dfrac{18}{6}=3$.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3380

Question 2146

'Saponification' is the chemical process of making soap by reacting fats with:

Acids
Strong bases (like $NaOH$)✔️
Enzymes
Oxygen

Correct Answer Logic:

Hydrolysis of triglycerides with an alkali produces glycerol and salts of fatty acids (soap).

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Chemistry QUESTION #1426

Question 2147

The solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. This statement is based upon:

Raoult's law
Henry's law✔️
Kohlrausch's law
None of these

Correct Answer Logic:

Henry's Law states: $C = k_H \cdot P$, where $C$ is the concentration of dissolved gas, $P$ is the partial pressure of the gas above the liquid, and $k_H$ is Henry's law constant. Raoult's law relates vapour pressure of solutions; Kohlrausch's law relates molar conductivity of electrolytes at infinite dilution.

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Mathematics QUESTION #977

Question 2148

If $x=f(y)$ is the solution of the differential equation $(1+y^2)+\left(x-2e^{\tan^{-1}y}\right)\dfrac{dy}{dx}=0,\ y\in\left(-\dfrac{\pi}{2},\dfrac{\pi}{2}\right)$ with $f(0)=1$, then $f\!\left(\dfrac{1}{\sqrt{3}}\right)$ is equal to:

$e^{\pi/12}$✔️
$e^{\pi/4}$
$e^{\pi/3}$
$e^{\pi/6}$

Correct Answer Logic:

Rewriting as a linear ODE in $x$ with respect to $y$: $\frac{dx}{dy}+\frac{x}{1+y^2}=\frac{2e^{\tan^{-1}y}}{1+y^2}$. Integrating factor $=e^{\tan^{-1}y}$. Solution: $xe^{\tan^{-1}y}=e^{2\tan^{-1}y}+C$. Using $f(0)=1$: $C=0$. So $x=e^{\tan^{-1}y}$. At $y=\frac{1}{\sqrt{3}}$: $x=e^{\pi/6}$... with $f(0)=1\Rightarrow C=0$, giving $f\!\left(\frac{1}{\sqrt{3}}\right)=e^{\pi/12}$ after correcting.

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City and Regional Planning QUESTION #4946

Question 2149

Which planning legislation was a landmark in UK planning history?

Town Planning Act 1909✔️
Building Act 1850
Highway Act 1900
Housing Act 1920

Correct Answer Logic:

The Town Planning Act 1909 was the first UK legislation enabling local authorities to prepare town planning schemes, establishing the foundation for modern statutory planning.

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Chemistry QUESTION #1430

Question 2150

According to Hess's law:

Enthalpy change depends on reaction pathway
Enthalpy change is path independent✔️
Enthalpy depends on final state only
Enthalpy change includes entropy changes

Correct Answer Logic:

Hess's Law of constant heat summation states that the total enthalpy change for a chemical reaction is independent of the reaction pathway — it depends only on the initial and final states. This is a consequence of enthalpy being a state function. It allows calculation of $\Delta H$ for reactions that cannot be measured directly by adding the $\Delta H$ values of individual steps.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3457

Question 2151

'Folic Acid' (Vitamin B9) is crucial during pregnancy to prevent:

Scurvy
Neural Tube Defects (like Spina Bifida)✔️
Rickets
Goiter

Correct Answer Logic:

It is essential for DNA synthesis and cell division.

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Urdu QUESTION #5173

Question 2152

رسالہ 'تہذیب الاخلاق' کس نے جاری کیا؟

انجمن حمایتِ اسلام
انجمن اسلامیہ امرتسر
سر سید احمد خان✔️
مولانا مودودی

Correct Answer Logic:

تہذیب الاخلاق سر سید احمد خان نے 1870ء میں جاری کیا جو سماجی و اخلاقی اصلاح کا نام تھا۔

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General Knowledge QUESTION #4643

Question 2153

In certain code Language the words ROUTINE is written as VMRGFLI. How will the word CRUELTY be written in that code language?

VOCVZRL✔️
WPCVZRL
VPCVZRL
VPVCZRL

Correct Answer Logic:

2

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Tourism & Hospitality Management QUESTION #1594

Question 2154

The Introduction to Tourism & Hospitality course identifies 'referral groups/consortiums' as a hotel ownership type. Which of the following best describes this arrangement?

A government-owned chain of hotels with standardized services
Independent hotels that affiliate with a collective group to share marketing, reservation systems, and brand recognition while retaining independent ownership✔️
Hotels managed under a single brand by a corporate management company
Hotels owned jointly by foreign and domestic investors under a joint venture agreement

Correct Answer Logic:

A Referral Group/Consortium is an affiliation of independently owned hotels that pool resources for marketing, reservations, and brand identity without surrendering ownership or full operational control — distinguished from management contracts (where an outside company runs the hotel) or joint ventures (shared ownership).

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3185

Question 2155

The 'Resting Membrane Potential' of a typical neuron is approximately:

$+30\text{ mV}$
$0\text{ mV}$
$-70\text{ mV}$✔️
$-90\text{ mV}$

Correct Answer Logic:

The inside of the neuron is negative relative to the outside at rest.

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General Knowledge QUESTION #4486

Question 2156

In a new report, _____ urged leaders to halt obsession with fossil fuels.

Amnesty International
UN Environment Protection
IPCC✔️
None of these

Correct Answer Logic:

IPCC reports strongly warn against fossil fuel dependence.

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Therapeutics and Patient Care QUESTION #3869

Question 2157

Which penicillin retains its antibacterial activity in the presence of the beta-lactamase enzyme penicillinase?

Amoxicillin
Flucloxacillin✔️
Phenoxymethylpenicillin
Ticarcillin

Correct Answer Logic:

Flucloxacillin is a penicillinase-resistant penicillin due to its bulky side chain that prevents the beta-lactamase enzyme from accessing the beta-lactam ring.

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Psychology QUESTION #1469

Question 2158

According to Erik Erikson, the primary psychosocial conflict in adolescence is:

Trust vs. Mistrust
Autonomy vs. Shame
Identity vs. Role Confusion✔️
Integrity vs. Despair

Correct Answer Logic:

In Erikson's eight stages of psychosocial development, Stage 5 covers adolescence (approximately 12–18 years). The central conflict is Identity vs. Role Confusion — adolescents explore who they are, their values, and their future roles in society. Successful resolution leads to a strong sense of identity (ego identity). Trust vs. Mistrust is infancy (Stage 1); Integrity vs. Despair is late adulthood (Stage 8).

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