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Math Physics Chemistry Biology QUESTION #4334

Which is an enzyme activator secreted by the intestinal glands?

Amylase
Pepsinogen
Enterokinase✔️
Lipase

Correct Answer Logic:

Enterokinase (enteropeptidase) is secreted by intestinal gland cells and activates trypsinogen to trypsin, initiating the activation cascade of pancreatic digestive enzymes.

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General Knowledge QUESTION #2590

Question 5662

UTF-8 is preferred over ASCII for modern office documents primarily because:

UTF-8 compresses files to a smaller size than ASCII
UTF-8 supports characters from virtually all written languages, while ASCII only covers basic English characters✔️
UTF-8 is faster to load on older computers
UTF-8 was developed before ASCII and is therefore more reliable

Correct Answer Logic:

UTF-8 is the most prevalent encoding standard used today because it can represent characters from virtually every written language in the world. ASCII is limited to English letters, digits, and basic punctuation, making it insufficient for multilingual documents.

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Physics QUESTION #7073

Question 5663

Radioactive substance $A$ has a half-life $T$ and transforms into substance $B$. At $t = 0$, the sample contains only $A$. At a specific time $t$, the ratio of the quantity of $B$ to $A$ is found to be $0.3$. Which of the following expressions correctly defines $t$ in terms of $T$?

$t = \frac{T}{\log(1.3)}$
$t = \frac{T}{2} \frac{\log 2}{\log 1.3}$
$t = T \frac{\log 1.3}{\log 2}$✔️
$t = T \log(1.3)$

Correct Answer Logic:

Let $N_A$ be the remaining nuclei of $A$ and $N_B$ be the produced nuclei of $B$. $N_B/N_A = 0.3 \implies (N_0 - N_A)/N_A = 0.3$. This gives $N_0/N_A = 1.3$, or $N_A = N_0/1.3$. Using the decay law $N = N_0 2^{-t/T}$, we get $1/1.3 = 2^{-t/T}$. Taking logs: $\log(1.3) = (t/T)\log 2$. Solving for $t$ gives $t = T \frac{\log 1.3}{\log 2}$.

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Accounting & Finance QUESTION #6165

Question 5664

You want to receive a perpetual annual scholarship payment of $5,000. If the interest rate is 8% and the payment grows by 3% each year, what is the required present value?

$62,500
$100,000✔️
$166,667
$250,000

Correct Answer Logic:

For a growing perpetuity: $PV = \frac{CCF}{i - g}$. So, $5,000 / (0.08 - 0.03) = 100,000$.

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General Knowledge QUESTION #8605

Question 5665

Ramadan is which month of the Islamic calendar?

7th
9th✔️
1st
10th

Correct Answer Logic:

Ramadan is the 9th month of the Islamic lunar calendar.

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Islamic Studies QUESTION #240

Question 5666

The Messenger of Allah ﷺ stood in respect for the funeral of a:

Polytheist
Jew✔️
Christian
None of these

Correct Answer Logic:

When a Jewish funeral passed by, the Prophet (ﷺ) stood up, saying "Is it not a human soul?"

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Chemistry QUESTION #1446

Question 5667

Which reaction involves the conversion of aldehydes into alcohols?

Oxidation
Reduction✔️
Hydrolysis
None of these

Correct Answer Logic:

Aldehydes ($RCHO$) are converted to primary alcohols ($RCH_2OH$) by reduction — adding hydrogen across the $C=O$ bond. Common reducing agents include $\text{NaBH}_4$ (sodium borohydride) and $\text{LiAlH}_4$ (lithium aluminium hydride). Oxidation of aldehydes gives carboxylic acids, not alcohols. Hydrolysis is for esters, amides, etc.

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Pakistan Affairs QUESTION #293

Question 5668

During the 1971 War, what strategic operation did the military initiate in the East?

Operation Searchlight✔️
Operation Swift Resort
Operation Desert Storm
Operation Gibraltar

Correct Answer Logic:

Operation Searchlight was the military crackdown launched in East Pakistan in March 1971.+2

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CISA QUESTION #1793

Question 5669

During an application review, an IS auditor encounters activity that may constitute an illegal act. What is the most appropriate course of action?

Disregard the finding as it falls outside the current review scope
Conduct an independent investigation to assist law enforcement
Immediately inform the auditee of the suspected activity
Obtain qualified legal counsel before proceeding further with the audit✔️

Correct Answer Logic:

Detecting illegal activity is outside the auditor's formal mandate; however, the auditor must not ignore the finding. The appropriate response is to seek competent legal advice to understand liability, disclosure obligations, and reporting requirements before taking any further action or communicating the finding to others.

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Planning QUESTION #4921

Question 5670

What is the main principle behind Transit-Oriented Development (TOD)?

Maximizing parking facilities
Concentrating development around transit stations✔️
Promoting private vehicle use
Decentralizing urban activities

Correct Answer Logic:

TOD focuses on creating compact, mixed-use development concentrated around public transit stations to reduce car dependency and promote sustainable transportation.

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Mathematics QUESTION #4121

Question 5671

By Mean Value Theorem on $f(x) = e^x$, for $x > 0$, there exists $c \in (0, x)$ such that:

$e^x - 1 = e^c \cdot x$✔️
$e^x - 1 = x$
$e^x = 1 + cx$
$\frac{e^x - 1}{x} = c$

Correct Answer Logic:

MVT: $\frac{f(x) - f(0)}{x - 0} = f'(c) = e^c$. So $\frac{e^x - 1}{x} = e^c$, giving $e^x - 1 = xe^c$.

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Physics and Math QUESTION #781

Question 5672

$\sinh^2 x + \cosh^2 x = ?$

$\cosh 2x$✔️
$\cosh x$
$\sinh 2x$
None

Correct Answer Logic:

Using hyperbolic identities: $\cosh^2 x + \sinh^2 x = \cosh 2x$.

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Nursing QUESTION #9130

Question 5673

Which of the following is the MOST reliable early indicator of placenta previa in a pregnant woman at 28 weeks?

Painful uterine contractions with bright red bleeding
Painless, sudden, bright red vaginal bleeding✔️
Abdominal rigidity with dark red bleeding
Show with associated rupture of membranes

Correct Answer Logic:

Placenta Previa is defined as implantation of the placenta over or near the internal cervical os. Its classic presentation:

Painless, sudden, bright red vaginal bleeding — often called 'causeless, painless hemorrhage'
No uterine tenderness or rigidity
Soft, non-tender uterus
May have abnormal lie (transverse/oblique) due to low placental implantation

Compare with Abruptio Placentae:

Feature	Placenta Previa	Abruption
Pain	Painless	Painful (knife-like)
Blood color	Bright red	Dark red
Uterus	Soft	Woody hard (Couvelaire)
Fetal heart	Usually normal	Often abnormal
Shock	Proportionate to visible loss	Disproportionate

NEVER perform vaginal examination in suspected placenta previa — it can precipitate catastrophic hemorrhage. Use ultrasound for diagnosis.

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Electrical Engineering QUESTION #2167

Question 5674

The z-transform of $x[n] = a^n u[n]$ is $X(z) = \frac{z}{z-a}$ with ROC $|z|>|a|$. For $a = 0.8$, the final value $\lim_{n \to \infty} x[n]$ is:

$0$✔️
$1$
$0.8$
Diverges to infinity

Correct Answer Logic:

Since $|a| = 0.8 < 1$, $\lim_{n\to\infty}(0.8)^n = 0$. Confirmed by the Final Value Theorem: $\lim_{z\to1}(z-1)X(z) = \lim_{z\to1}\frac{z(z-1)}{z-0.8} = 0$.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3482

Question 5675

The 'Taxonomical' classification of drugs is based on:

Natural relationship and phylogeny✔️
Alphabetical order
Healing properties
Physical appearance

Correct Answer Logic:

Taxonomical classification follows the biological hierarchy (Family, Genus, Species).

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Administration QUESTION #2918

Question 5676

The "Spoil System" of public employment is best described as:

Hiring based on merit
Appointments based on political loyalty✔️
Selection by competitive exams
Random recruitment

Correct Answer Logic:

The Spoil System (Patronage) involves rewarding political supporters with government jobs regardless of their professional qualifications.

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Chemistry QUESTION #7787

Question 5677

A reaction is first order in A and second order in B. The rate equation is:

Rate $= k[A]$
Rate $= k[A][B]$
Rate $= k[A]^2[B]$
Rate $= k[A][B]^2$✔️

Correct Answer Logic:

Rate law: Rate = k[A]^1 [B]^2.

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Physics QUESTION #4384

Question 5678

When an object attains terminal velocity, its acceleration is:

$9.8\ m/s^2$
Zero✔️
$1\ m/s^2$
$9.8\ m/s^2$ downward

Correct Answer Logic:

At terminal velocity, the net force on the object is zero — drag force equals gravitational force. By Newton's second law: $F_{net} = ma = 0$, so acceleration $a = 0$.

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Chemistry QUESTION #1076

Question 5679

Match List-I with List-II: (A) Haber process — (B) Wacker oxidation — (C) Wilkinson catalyst — (D) Ziegler catalyst; with (I) Fe catalyst (II) PdCl$_2$ (III) [(PPh$_3)_3$RhCl] (IV) TiCl$_4$ with Al(CH$_3)_3$

A-I, B-II, C-III, D-IV✔️
A-I, B-IV, C-III, D-II
A-I, B-II, C-IV, D-III
A-II, B-III, C-I, D-IV

Correct Answer Logic:

Haber process (NH$_3$ synthesis): Fe catalyst (I). Wacker oxidation (ethylene to acetaldehyde): PdCl$_2$ (II). Wilkinson catalyst (hydrogenation): [(PPh$_3)_3$RhCl] (III). Ziegler-Natta catalyst (polymerization): TiCl$_4$ + Al(CH$_3)_3$ (IV). Matching: A-I, B-II, C-III, D-IV.

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Physics and Math QUESTION #785

Question 5680

The A.M between 1000 and 4 is?

502✔️
500
402
602

Correct Answer Logic:

Arithmetic Mean $= \dfrac{1000 + 4}{2} = \dfrac{1004}{2} = 502$.

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