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Maths QUESTION #4578

Question 1

If $a:b = 2:3$ and $b:c = 4:5$, what is $a:c$?

$8:15$✔️
$2:5$
$6:20$
Cannot determine

Correct Answer Logic:

$a:b = 2:3$ and $b:c = 4:5$. Make $b$ equal: $a:b = 8:12$ and $b:c = 12:15$. So $a:c = 8:15$

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Molecular Biology / Bioinformatics / Biochemistry QUESTION #11076

Question 2

Which commercially important substance is produced from seaweeds?

Gelatin
Alginic acid✔️
Carrageenan
Biotoxin

Correct Answer Logic:

Alginic acid (alginate) is extracted from brown seaweeds (Phaeophyta, especially Macrocystis, Laminaria, Ascophyllum). It is a polysaccharide used as a gelling, thickening, and stabilising agent in food, pharmaceuticals, and biotechnology. Carrageenan is also produced from red seaweeds and is an option, but alginic acid is the most characteristic seaweed product. Gelatin is animal-derived (collagen); biotoxins are harmful substances, not commercial products.

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Accounting Finance and Punjab Sales Tax on Services QUESTION #2562

Question 3

Under the Offences and Penalties Schedule of the Act, where a person fails or refuses to issue a tax invoice, the penalty for the FIRST default is:

Ten thousand rupees
Twenty thousand rupees✔️
Fifty thousand rupees
One hundred thousand rupees

Correct Answer Logic:

Entry No. 17 of the Offences and Penalties Schedule provides that where a person fails or refuses to issue a tax invoice, the person shall be liable to pay a penalty of TWENTY THOUSAND RUPEES on first default and fifty thousand rupees for each subsequent default.

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Biology Zoology Botany QUESTION #10800

Question 4

RNA polymerase I transcribes which type of RNA in the nucleolus?

rRNA✔️
tRNA
mRNA
siRNA

Correct Answer Logic:

RNA polymerase I is located in the nucleolus and transcribes the large ribosomal RNA precursor (pre-rRNA), which is processed into the 28S, 18S, and 5.8S rRNA components of ribosomes. RNA polymerase II transcribes mRNA (and snRNA, miRNA); RNA polymerase III transcribes tRNA, 5S rRNA, and other small RNAs. This division of labour is unique to eukaryotes; prokaryotes have a single RNA polymerase.

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Logical Reasoning QUESTION #3952

Question 5

The increase in red meat intake has become a _____ and _____ issue in public health circles.

abated...dubious✔️
skyrocketed...stressful
abounded...divisive
stabilized...newsworthy

Correct Answer Logic:

4

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Physics QUESTION #421

Question 6

A yellow light of wavelength 500 mm emitted by a single source passes through two narrow slits 1 mm apart. How far apart are two adjacent bright fringes when interference is observed on a screen 10 m away?

5 mm✔️
1.33 mm
0.5 mm
50 mm

Correct Answer Logic:

Fringe width = ?D/d = (500?10???10)/(1?10??) = 5?10?? m = 5 mm

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General Knowledge QUESTION #8775

Question 7

A small town in Sindh called 'Kati Bunder' is famous for:

Historical site
Gas and oil field
Fish harbour
Both B and C (gas/oil and fish harbour)✔️

Correct Answer Logic:

Kati Bunder is known for its gas/oil field and fish harbour.

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Pakistan Affairs QUESTION #9085

Question 8

SECP (Securities and Exchange Commission of Pakistan) is the regulatory authority of:

Stock market✔️
NGOs
Media business
Import and export

Correct Answer Logic:

SECP regulates the capital markets in Pakistan.

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Psychology QUESTION #9824

Question 9

An insufficient supply of thyroid hormone can result in:

Increased metabolic rate
Cretinism✔️
Increased emotionality
None of these

Correct Answer Logic:

Cretinism results from severe thyroid hormone deficiency during fetal/early childhood development, causing stunted growth and intellectual disability. Hypothyroidism causes slowed metabolism — the opposite of increased metabolic rate.

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Planning QUESTION #4936

Question 10

In cost-benefit analysis, what does NPV stand for?

Net Present Value✔️
National Planning Vision
Nominal Project Value
New Property Valuation

Correct Answer Logic:

NPV (Net Present Value) calculates the present value of future cash flows minus initial investment: $NPV = \sum_{t=0}^{n} \frac{C_t}{(1+r)^t}$ where $C_t$ is cash flow at time t and r is discount rate.

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Chemistry QUESTION #1445

Question 11

What is the major product when ethyl acetate is hydrolyzed under acidic conditions?

Acetic acid and ethanol✔️
Acetaldehyde and ethanol
Acetone and ethanol
None of these

Correct Answer Logic:

Acid hydrolysis (esterification in reverse) of ethyl acetate ($CH_3COOC_2H_5$) proceeds by nucleophilic acyl substitution: $CH_3COOC_2H_5 + H_2O \xrightarrow{H^+} CH_3COOH + C_2H_5OH$. The products are acetic acid (ethanoic acid) and ethanol. This is a Fischer esterification run in reverse (saponification under acidic conditions gives the acid, not the carboxylate salt).

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Mathematics QUESTION #4127

Question 12

Using Cauchy Residue Theorem, evaluate $\oint_{|z|=2} \frac{5z - 2}{z(z-1)} \, dz$. The poles inside are at:

$z = 0$ only
$z = 1$ only
$z = 0$ and $z = 1$✔️
No poles inside $|z| = 2$

Correct Answer Logic:

Poles at $z = 0$ and $z = 1$. Both satisfy $|z| < 2$, so both are inside the contour.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3616

Question 13

'Organoleptic' evaluation of a drug refers to evaluation by:

Chemical titration
Microscopic examination
Means of sense organs (color, odor, taste)✔️
Animal testing

Correct Answer Logic:

It is the simplest method using sight, smell, and touch.

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Mathematics QUESTION #4149

Question 14

For $y'' + y = \sec(x)$, using variation of parameters, what is $u_1'$ where $y_p = u_1\cos(x) + u_2\sin(x)$?

$-\sin(x)\sec(x)$
$-\sin(x)\sec(x) = -\tan(x)$✔️
$\cos(x)\sec(x) = 1$
$\tan(x)$

Correct Answer Logic:

$u_1' = -\frac{y_2 f(x)}{W} = -\frac{\sin(x) \sec(x)}{1} = -\tan(x)$.

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General Knowledge QUESTION #4785

Question 15

Silk Air is an airline based in which country?

Sri Lanka
Switzerland
Singapore✔️
Thailand

Correct Answer Logic:

Silk Air was a regional airline and a wholly owned subsidiary of Singapore Airlines, headquartered in Singapore. It was merged into Singapore Airlines in 2021.

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Mathematics QUESTION #1283

Question 16

The function $f(x)=e^x$ satisfies the Mean Value Theorem on $[0,1]$. The value of $c\in(0,1)$ guaranteed by MVT satisfies:

e^c = e-1✔️
$e^c=\dfrac{e+1}{2}$
e^c=\dfrac{1}{e}
e^c=1

Correct Answer Logic:

By MVT: $f'(c)=\dfrac{f(1)-f(0)}{1-0}=\dfrac{e-1}{1}=e-1$. Since $f'(x)=e^x$, we get $e^c=e-1$. Since \(1

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Math Physics Chemistry Biology QUESTION #11379

Question 17

Except during nuclear division, the nucleus has the chromosomes in a loosely coiled state known as:

Chromatin✔️
Ribosomes
DNA
Chromatids

Correct Answer Logic:

During interphase, chromosomal DNA is in a loosely coiled, extended form called chromatin. This extended state allows access to DNA for transcription and replication. Chromatin consists of DNA wound around histone proteins (nucleosomes). Chromosomes only condense into the compact, visible form during cell division.

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General Knowledge QUESTION #168

Question 18

The concept of Ijma’a follows the principle of agreement by:

51%
66%
100%
None of these✔️

Correct Answer Logic:

Traditionally, Ijma’a refers to the total consensus (unanimity) of Islamic scholars.

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General Knowledge QUESTION #11576

Question 19

MS Office provides built-in user assistance through features such as:

Help Menu
'What is this?' tool
Office Assistant
All of the above✔️

Correct Answer Logic:

MS Office provides help through all of the above: (A) Help menu (F1 or Help tab), (B) 'What's This?' (Shift+F1 in older versions — context-sensitive help), and (C) Office Assistant (Clippy in Office 97–2003). In modern Office, help is via the Tell Me search box (lightning bolt icon).

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Nursing QUESTION #9221

Question 20

A Charge Nurse applies Leavell and Clark's Levels of Prevention framework. Administering hepatitis B vaccine to nursing staff represents which level?

Primordial prevention
Primary prevention✔️
Secondary prevention
Tertiary prevention

Correct Answer Logic:

Correct Answer: B — Primary prevention

Levels of Prevention (Leavell & Clark):

Level	Goal	Examples
Primordial	Prevent risk factors from emerging	Health policies, societal change
Primary	Prevent disease before it occurs	Vaccination, health education, sanitation
Secondary	Early detection and prompt treatment	Screening tests, early diagnosis (e.g., mammography, TB skin test)
Tertiary	Reduce disability; rehabilitation	Physiotherapy, chronic disease management, support groups

Hepatitis B vaccination prevents disease before exposure occurs — this is primary prevention (health protection). Note: Secondary prevention would be testing nurses for hepatitis B exposure after a needlestick injury.

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