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Biology QUESTION #4304

Question 1981

Once an action potential reaches the membrane of a skeletal muscle fiber, what is the first event in the contraction process?

Actin and myosin form a cross-bridge
Calcium is pumped back into the sarcoplasmic reticulum
Calcium is released from the sarcoplasmic reticulum✔️
ATP is hydrolyzed by troponin

Correct Answer Logic:

When an action potential arrives, it triggers the sarcoplasmic reticulum to release $Ca^{2+}$ ions, which bind to troponin, moving tropomyosin and allowing cross-bridge formation.

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General Knowledge QUESTION #61

Question 1982

A city council introduced a policy to reduce traffic congestion by charging drivers a fee to enter the downtown area during peak hours. The goal was to discourage car usage and encourage public transportation. Six months after implementation, data showed that traffic volume in the downtown area dropped by 18 percent. However, surveys revealed that bus and train ridership increased by only 5 percent. At the same time, several nearby neighborhoods reported a significant rise in traffic during peak hours. Local businesses outside the downtown zone complained that delivery delays had increased because roads leading to their locations were more congested.

Sub-Questions:

Question 1

Based on the passage above, which of the following statements is most strongly supported?

The traffic fee likely caused some drivers to change their routes rather than stop driving.
The new fee caused most drivers to switch to public transportation.
The traffic fee likely caused some drivers to change their routes rather than stop driving.✔️
Local businesses benefited from faster traffic movement in their areas.

Question 2

The traffic fee likely caused some drivers to change their routes rather than stop driving.

The new fee caused most drivers to switch to public transportation.
Based on the passage above, which of the following statements is most strongly supported?✔️
Local businesses benefited from faster traffic movement in their areas.✔️
None of these

Correct Answer Logic:

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Urdu QUESTION #1407

Question 1983

اردو کی وہ کون سی کتاب ہے جس میں عربی فارسی کا ایک بھی لفظ شامل نہ ہو؟

مہر نیم روز
فسانۂ عجائب
پدماوت
رانی کیتکی کی کہانی✔️

Correct Answer Logic:

''رانی کیتکی کی کہانی'' منشی انشاء اللہ خاں انشا کی وہ مشہور تحریر ہے جس میں انہوں نے جان بوجھ کر صرف خالص ہندی (کھڑی بولی) کے الفاظ استعمال کیے اور عربی فارسی کا کوئی لفظ نہیں آنے دیا۔ یہ اردو نثر کا ایک منفرد تجربہ ہے۔

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Others section QUESTION #4787

Question 1984

Where was Jesus Christ born according to historical and religious accounts?

Iraq
Jerusalem
Bethlehem
Nazareth✔️

Correct Answer Logic:

Jesus Christ was born in Bethlehem, a town in Judea (present-day Palestinian West Bank). This is consistent with both the Gospels of Matthew and Luke and historical scholarship.

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Mathematics QUESTION #1303

Question 1985

Green's Theorem relates the line integral around a closed curve $C$ to the double integral over the enclosed region $R$ by:

$\oint_C(P\,dx+Q\,dy)=\iint_R\left(\dfrac{\partial Q}{\partial y}-\dfrac{\partial P}{\partial x}\right)dA$
$\oint_C(P\,dx+Q\,dy)=\iint_R\left(\dfrac{\partial Q}{\partial x}-\dfrac{\partial P}{\partial y}\right)dA$✔️
$\oint_C(P\,dx+Q\,dy)=\iint_R(P+Q)\,dA$
$\oint_C\vec{F}\cdot d\vec{r}=\iint_R|\vec{F}|\,dA$

Correct Answer Logic:

Green's Theorem: $\oint_C(P\,dx+Q\,dy)=\iint_R\left(\dfrac{\partial Q}{\partial x}-\dfrac{\partial P}{\partial y}\right)dA$, where $C$ is traversed counter-clockwise. This converts a 1D line integral into a 2D area integral over the region enclosed by $C$.

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Statistics QUESTION #2002

Question 1986

Using the same company data (800 employees, 160 degree holders, 272 managers, 80 are both), the conditional probability $P(\text{college graduate} \mid \text{manager})$ is:

$\dfrac{80}{160}$
$\dfrac{80}{272}$✔️
$\dfrac{272}{800}$
$\dfrac{160}{272}$

Correct Answer Logic:

$P(\text{grad} \mid \text{manager}) = \dfrac{P(\text{grad} \cap \text{manager})}{P(\text{manager})} = \dfrac{80/800}{272/800} = \dfrac{80}{272} \approx 0.294$. This is the definition of conditional probability.

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Chemistry QUESTION #4347

Question 1987

Which of the following best explains why phenol reacts with aqueous $NaOH$, but alcohols do not?

Phenol has a lower boiling point than alcohol
Alcohols contain a strong O-H bond that cannot be broken by weak bases
Phenol forms hydrogen bonding that facilitates ionization
Phenol is weakly acidic due to resonance stabilization of phenoxide ion✔️

Correct Answer Logic:

Phenol ($C_6H_5OH$) is acidic ($pK_a \approx 10$) because the phenoxide ion ($C_6H_5O^-$) is stabilized by resonance with the benzene ring. Alcohols are not acidic enough to react with $NaOH$.

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Tourism & Hospitality Management QUESTION #1597

Question 1988

In the Introduction to Tourism & Hospitality course, 'superstructure' in tourism refers to which of the following?

The physical road and utility networks supporting tourism
Tourism-specific built facilities such as hotels, resorts, restaurants, and attractions developed to serve tourists✔️
Government tourism ministries and policy frameworks
The cultural and heritage resources of a destination

Correct Answer Logic:

In tourism studies, 'superstructure' refers to tourism-specific developments built to serve visitors: hotels, resorts, restaurants, recreational facilities, and attractions. This is distinguished from 'infrastructure' (roads, utilities, airports, water supply) which serves both residents and tourists. Both concepts are covered in the Introduction to Tourism & Hospitality course.

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Others section QUESTION #4756

Question 1989

Who was the first Muslim Nobel Laureate in history?

Anwar Sadat of Egypt✔️
Yasser Arafat of Palestine
Abdus Salam of Pakistan
Naguib Mahfouz of Egypt

Correct Answer Logic:

Anwar Sadat of Egypt was the first Muslim Nobel Laureate, receiving the 1978 Nobel Peace Prize jointly with Israeli PM Menachem Begin for the Camp David Accords.

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Basic Mathematics QUESTION #2889

Question 1990

What is the value of $x$ if $\frac{x}{4} + 5 = 8$?

12✔️
4
3
7

Correct Answer Logic:

$x/4 = 3 \implies x = 3 \times 4 = 12$.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3093

Question 1991

The 'Neuromuscular Junction' is the gap between a motor neuron and a:

Sensory receptor
Muscle fiber✔️
Bone
Gland

Correct Answer Logic:

This is the site where the nervous system signals the muscular system to contract.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3029

Question 1992

A 'Bougie' is a suppository intended for the:

Eye
Urethra✔️
Mouth
Stomach

Correct Answer Logic:

Urethral suppositories are called bougies.

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General Science and Ability QUESTION #251

Question 1993

The protein molecule is made of:

Alkaloids
Nucleosides
Short range chain of amino acids
Long range chain of amino acids✔️

Correct Answer Logic:

Proteins are large biomolecules consisting of long chains of amino acid residues.+1

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Pakistan Affairs QUESTION #131

Question 1994

What was the population of Pakistan at the time of independence in 1947?

70 million
32.5 million✔️
60 million
90 million

Correct Answer Logic:

The total population was roughly 70 million across both wings; however, West Pakistan's population was approximately 32.5 million.

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MCQs Section QUESTION #4872

Question 1995

Correct antonym of "UNEQUIVOCAL" is

Careless
Unmistakable
Variable✔️
Incomparable

Correct Answer Logic:

Unequivocal means leaving no doubt; clear and unambiguous. Its antonym is 'variable,' meaning liable to change and lacking certainty or clarity.

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Statistics QUESTION #1976

Question 1996

For a frequency distribution, the first three raw moments about $x = 0$ given that $\mu_1' = 1$, $\mu_2' = 16$, $\mu_3' = -40$ are about $a=2$. The second raw moment about $x=0$ is:

$15$
$16$
$24$✔️
$18$

Correct Answer Logic:

Second raw moment about zero: $\nu_2 = \mu_2' + a^2 + 2a\mu_1' = 16 + 4 + 2(2)(1) = 24$. Alternatively using $\nu_2 = \mu_2 + \bar{x}^2 = 15 + 9 = 24$, confirming the answer.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3510

Question 1997

Substituting a genuine drug with look-alike exhausted or exhausted materials is called:

Sophistication
Admixture
Substitution✔️
Deterioration

Correct Answer Logic:

Substitution is the replacement of the original with something totally different or inferior.

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Commerce QUESTION #1219

Question 1998

The authority to remove the first auditor before the expiry of term is with:

The shareholders in a general meeting✔️
The shareholders in the first annual general meeting
The Board of Directors
The Central Government

Correct Answer Logic:

Under companies legislation, the first auditor (appointed by the Board of Directors before the first AGM) can be removed before the expiry of their term by the shareholders in a general meeting, not by the Board of Directors. This safeguards auditor independence from management.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3428

Question 1999

Which of the following is a 'Heteropolysaccharide'?

Starch
Glycogen
Hyaluronic Acid✔️
Cellulose

Correct Answer Logic:

Heteropolysaccharides are made of more than one type of monosaccharide unit.

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Mathematics QUESTION #1295

Question 2000

The area of the region enclosed between $y=x^2$ and $y=x+6$ is:

20$\dfrac{1}{6}$
14$\dfrac{2}{3}$
$\dfrac{125}{6}$✔️
18

Correct Answer Logic:

Intersections: $x^2=x+6\Rightarrow x^2-x-6=0\Rightarrow(x-3)(x+2)=0$, so $x=-2,3$. Area $=\int_{-2}^{3}(x+6-x^2)\,dx=\left[\dfrac{x^2}{2}+6x-\dfrac{x^3}{3}\right]_{-2}^{3}=\left(\dfrac{9}{2}+18-9\right)-\left(2-12+\dfrac{8}{3}\right)=\dfrac{27}{2}+\dfrac{34}{3}=\dfrac{81+68}{6}=\dfrac{125}{6}$.

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