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Mathematics QUESTION #4102

The order of element $4$ in the cyclic group $\mathbb{Z}_{18}$ is:

$9$✔️
$4$
$6$
$18$

Correct Answer Logic:

The order of element $k$ in $\mathbb{Z}_n$ is $\dfrac{n}{\gcd(k,n)}$. Here: $\dfrac{18}{\gcd(4,18)}=\dfrac{18}{2}=9$. So element $4$ has order $9$ in $\mathbb{Z}_{18}$.

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Verbal Reasoning QUESTION #8081

Question 2

$(19 - 18 - 17 - 16) - (20 - 19 - 18 - 17) =$

$-36$
$-6$
$-4$
$1$✔️

Correct Answer Logic:

Calculate each parenthesis separately:

First: $(19 - 18 - 17 - 16) = 19 - 18 - 17 - 16 = 1 - 17 - 16 = -16 - 16 = -32$

Second: $(20 - 19 - 18 - 17) = 20 - 19 - 18 - 17 = 1 - 18 - 17 = -17 - 17 = -34$

Now subtract: $(-32) - (-34) = -32 + 34 = 2$

Wait, let me recalculate more carefully:

$(19 - 18 - 17 - 16) = 19 - 51 = -32$

$(20 - 19 - 18 - 17) = 20 - 54 = -34$

$(-32) - (-34) = -32 + 34 = 2$

Hmm, 2 is not among the options. Let me check the arithmetic again:

$19 - 18 = 1$, $1 - 17 = -16$, $-16 - 16 = -32$ ✓

$20 - 19 = 1$, $1 - 18 = -17$, $-17 - 17 = -34$ ✓

$-32 - (-34) = 2$

Since the given answer is D, which corresponds to index 3 (value 1), there may be an error in my reading or the answer key. But mathematically, the answer is 2.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3525

Question 3

In the 'Homeopathic' system, drugs are selected based on the principle of:

Law of Opposites
'Similia Similibus Curentur' (Like cures like)✔️
Surgical intervention
Vaccination

Correct Answer Logic:

Homeopathy uses highly diluted substances that cause symptoms similar to the disease.

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Physical Education QUESTION #6799

Question 4

How did the Enlightenment period fundamentally change the justification for Physical Education compared to the Middle Ages?

It focused on preparation for feudal warfare
It emphasized naturalism and the physiological necessity of movement for health and reason✔️
It viewed physical activity as a distraction from spiritual salvation
It prioritized aesthetic beauty over functional health

Correct Answer Logic:

Enlightenment thinkers like Rousseau argued that physical activity was a natural necessity for developing a child's reasoning and overall health.

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Biology QUESTION #7767

Question 5

The physical appearance or observable characteristic of an organism is called its:

Allele
Genetic code
Genotype
Trait✔️

Correct Answer Logic:

Trait (or phenotype) is the physical expression (e.g., tall, dwarf). Genotype is the genetic makeup; allele is a variant form; genetic code is the triplet codon system.

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HR and Management QUESTION #6472

Question 6

Human Resource Information System (HRIS) is primarily designed to:

Replace HR managers with automated systems
Provide an HR information base and implement employee communication systems✔️
Reduce headcount in HR departments
Eliminate paperwork entirely

Correct Answer Logic:

HRIS is designed to provide an HR information base and design/implement employee communication systems. It's a tool for better information management and communication, not a replacement for HR professionals.

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General Abilities QUESTION #4538

Question 7

What is $(\sqrt{a})^2$ for $a > 0$?

$a$✔️
$\sqrt{a}$
$a^2$
$2a$

Correct Answer Logic:

$(\sqrt{a})^2 = a$ for any positive $a$. The square and square root cancel each other.

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5805

Question 8

Which board is responsible for inspecting laboratories for drug registration?

PQCB
CLB
Registration Board✔️
Appellate Board

Correct Answer Logic:

The Registration Board inspects labs and registers drugs[cite: 7].

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Biology QUESTION #4190

Question 9

All of the following are the characteristics of limbic system EXCEPT:

Produce most basic and primitive emotions and drives✔️
formation of memories
Consists of hypothalamus
amygdala and hippocampus

Correct Answer Logic:

3

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Dairy Food Science and Technology QUESTION #5982

Question 10

In the production of WPC (Whey Protein Concentrate), the MWCO of UF membranes used is typically:

$100\text{–}200\;\text{Da}$ (nanofiltration range)
$5{,}000\text{–}30{,}000\;\text{Da}$ (retains whey proteins; $\beta$-Lg MW $= 18{,}300\;\text{Da}$; $\alpha$-La MW $= 14{,}000\;\text{Da}$)✔️
$100{,}000\;\text{Da}$ (retains only casein micelles)
$1{,}000{,}000\;\text{Da}$ (retains only fat globules)

Correct Answer Logic:

UF membranes with $5{,}000\text{–}30{,}000\;\text{Da}$ MWCO are used for WPC/WPI production. They retain whey proteins ($\beta$-Lg MW $\approx 18{,}300\;\text{Da}$, $\alpha$-La MW $\approx 14{,}000\;\text{Da}$, BSA $\approx 67{,}000\;\text{Da}$) while allowing lactose ($342\;\text{Da}$), minerals, and water to permeate.

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Accounting & Finance QUESTION #6114

Question 11

X and Y share profits 3:2. Interest on drawings: X $550, Y $450 (at 5%). Profit for year: $94,000. Loan interest paid to X: $3,000. Each partner drew an amount equal to their salary. What was Y's share of residual profit?

$28,800
$29,200✔️
$30,000
$38,000

Correct Answer Logic:

Option B ($29,200) is correct.

X's salary = $550 ÷ 5% = $11,000; Y's salary = $450 ÷ 5% = $9,000

Residual profit = $94,000 − $3,000 + $1,000 − $11,000 − $9,000 = $73,000 (Interest on drawings added back: $550+$450=$1,000)

Y's share = 2/5 × $73,000 = $29,200

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3039

Question 12

'Hot Air Oven' sterilization is suitable for:

Rubber gloves
Glassware and metal instruments✔️
Plastic syringes
Antibiotic solutions

Correct Answer Logic:

Dry heat in a hot air oven is ideal for glassware but would melt rubber or plastic.

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Biology QUESTION #7259

Question 13

The one gene–one enzyme relationship was established for the first time in:

Diplococcus pneumoniae
Neurospora crassa✔️
Salmonella typhimurium
Escherichia coli

Correct Answer Logic:

Beadle and Tatum (1941) established the one gene–one enzyme hypothesis using the bread mould Neurospora crassa. They induced mutations by X-rays and found each mutation blocked a specific metabolic step, implying each gene codes for one enzyme. This work won them the Nobel Prize in 1958.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3386

Question 14

'Zwitterion' is a state where an amino acid has:

Only a positive charge
Only a negative charge
Both positive and negative charges (neutral net charge)✔️
No charges at all

Correct Answer Logic:

This occurs at the isoelectric point ($pI$).

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Education QUESTION #6885

Question 15

Which of the following is the MOST accurate definition of 'benchmarking' in the context of behavioral record-keeping in schools?

The process of comparing a student's academic performance against national test score averages
Recording and monitoring student behavior against specific, pre-defined performance indicators at designated intervals✔️
A technique in which teachers rank students' behavioral outcomes relative to their classroom peers
A method of documenting teacher performance during classroom observations for appraisal purposes

Correct Answer Logic:

In behavioral record-keeping, benchmarks are specific reference points tied to observable levels of behavioral performance. They allow teachers and administrators to track whether a student is progressing, plateauing, or regressing in behavioral development over time — similar to how academic benchmarks track cognitive progress.

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General Abilities QUESTION #4638

Question 16

Round $3.7456$ to $2$ decimal places:

$3.74$
$3.75$✔️
$3.7$
$3.8$

Correct Answer Logic:

Third decimal is $5$, so round up: $3.75$

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Urdu QUESTION #5231

Question 17

وہ حروف جو سوال کرنے پر استعمال ہوتے ہیں کہلاتے ہیں؟

ندائیہ
استفہامی✔️
فجائیہ
ان میں سے کوئی نہیں

Correct Answer Logic:

استفہامی حروف وہ ہوتے ہیں جو سوال پوچھنے کے لیے استعمال ہوں جیسے کیا، کیوں، کہاں۔

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Biology Zoology Botany QUESTION #1387

Question 18

What is the characteristic feature of the Fabaceae family?

Composite flowers
Opposite leaves
Papilionaceous corolla✔️
Parallel venation

Correct Answer Logic:

Fabaceae (legume family, previously Leguminosae) is characterised by the papilionaceous (butterfly-like) corolla consisting of 5 petals: 1 standard (vexillum), 2 wings (alae), and 2 fused keel petals (carina). Other features include compound leaves, stipules, and the presence of root nodules with nitrogen-fixing Rhizobium bacteria.

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Mathematics QUESTION #1261

Question 19

The transformation $T:\mathbb{R}^3\to\mathbb{R}^2$ defined by $T(x,y,z)=(|x|,\,y+z)$ is:

Linear
Not linear because it is not onto
Not linear because $T(-x,y,z)\neq -T(x,y,z)$✔️
Linear only for $x\geq0$

Correct Answer Logic:

A linear transformation requires $T(c\mathbf{v})=cT(\mathbf{v})$. Check: $T(-1,0,0)=(|-1|,0)=(1,0)$ but $-T(1,0,0)=-(1,0)=(-1,0)$. Since $T(-\mathbf{v})\neq -T(\mathbf{v})$, $T$ is NOT linear. The $|x|$ component violates homogeneity.

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General Abilities QUESTION #7994

Question 20

$18\tfrac{1}{6} \div 2\tfrac{1}{3} = ?$

$4\tfrac{1}{2}$
$11\tfrac{7}{14}$
$7\tfrac{11}{14}$✔️
None

Correct Answer Logic:

$18\tfrac{1}{6} = \dfrac{109}{6}$ and $2\tfrac{1}{3} = \dfrac{7}{3}$
$\dfrac{109}{6} \div \dfrac{7}{3} = \dfrac{109}{6} \times \dfrac{3}{7} = \dfrac{327}{42} = \dfrac{109}{14} = 7\tfrac{11}{14}$

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