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Psychology QUESTION #9772

Longitudinal research methods investigate:

Behaviour through time as subjects age✔️
Behaviour of different ages compared
Cross-sectional data
None of these

Correct Answer Logic:

Longitudinal research follows the same individuals over time, observing how behaviour and characteristics change as they age. This contrasts with cross-sectional research, which compares different age groups at a single point in time.

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Mathematics QUESTION #11190

Question 2

Which of the following is a scalar?

$(\mathbf{a}\cdot\mathbf{b})\mathbf{c}$
$\mathbf{a}\cdot(\mathbf{b}\times\mathbf{c})$✔️
$\mathbf{a}\times(\mathbf{b}\times\mathbf{c})$
$(\mathbf{a}\cdot\mathbf{b})(\mathbf{a}-\mathbf{a})$

Correct Answer Logic:

The scalar triple product $\mathbf{a}\cdot(\mathbf{b}\times\mathbf{c})$ is a scalar — it gives the volume of the parallelepiped formed by the three vectors. Option (A) $(\mathbf{a}\cdot\mathbf{b})\mathbf{c}$ is a vector (scalar times vector); option (C) is a vector triple product (vector); option (D) is zero vector.

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Adult Health [Medicine and Surgery] QUESTION #3917

Question 3

A 25-year-old female presents with unexplained weight loss, fine tremors, and heat intolerance. Her pulse is $100/ ext{min}$, and she has a smooth goiter with observable lid lag. Which of the following is the most likely diagnosis?

Graves' disease✔️
Toxic multinodular goiter
De Quervain's thyroiditis
Hashimoto's thyroiditis

Correct Answer Logic:

No explanation provided for this question.

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English QUESTION #8467

Question 4

Select the word OPPOSITE in meaning to: Absurd

happy
beautiful
funny
Rational✔️

Correct Answer Logic:

Absurd means ridiculous or unreasonable; opposite is rational.

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Mathematics QUESTION #1281

Question 5

For $f(x,y)=2x^3+y^2-9x^2-4y+12x-2$, the critical points are found by setting:

Only $f_x=0$
Only $f_y=0$
$f_x=0$ and $f_y=0$ simultaneously✔️
$f_{xx}=0$ and $f_{yy}=0$

Correct Answer Logic:

Critical points occur where all first partial derivatives vanish simultaneously: $f_x=6x^2-18x+12=6(x^2-3x+2)=6(x-1)(x-2)=0\Rightarrow x=1$ or $x=2$; $f_y=2y-4=0\Rightarrow y=2$. Critical points: $(1,2)$ and $(2,2)$.

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Agronomy QUESTION #2080

Question 6

Pre-emergence herbicides are most effective when:

Applied to the soil surface just before crop harvest
Applied to the soil surface before weed seeds germinate and seedlings emerge, requiring activation by rainfall or irrigation to move into the germinating weed seed zone where they disrupt seedling growth✔️
Applied to fully emerged weed foliage using directed spraying
Mixed with foliar fertilizers to improve weed control

Correct Answer Logic:

Pre-emergence herbicides act on germinating seeds in the soil — they must be incorporated into the top 2–5 cm of the germination zone by rainfall or irrigation (activation) to contact the target weed. They form a chemical barrier disrupting cell division or pigment synthesis in germinating seedlings. Dry, crusted soil surfaces, delayed activation, and deep-plowed weed seeds reduce their efficacy.

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Islamic Studies QUESTION #644

Question 7

During the Second Pledge of al-'Aqaba, ________ men and two women offered an oath of allegiance to the Prophet Muhammad (ﷺ).

73✔️
63
83
None of these

Correct Answer Logic:

73 men and 2 women from Madina took the second pledge at Aqaba.

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General Knowledge QUESTION #8681

Question 8

What does 'chauvinism' mean?

Strong belief that your country or gender is superior✔️
Male dominance in society
Politics of non-issues
None of above

Correct Answer Logic:

Chauvinism means excessive or prejudiced loyalty to a group.

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General Knowledge QUESTION #4807

Question 9

The United Nations uses the Human Development Index (HDI) primarily to measure what?

Predict which countries may engage in ethnic cleansing
Demonstrate how effectively a country provides for citizens' welfare and security✔️
Predict the percentage of displaced people from failed states
Prove the Global South is not as impoverished as claimed

Correct Answer Logic:

The Human Development Index (HDI), developed by Mahbub ul Haq and UNDP, measures a country's achievement in three key dimensions: long and healthy life, access to education, and a decent standard of living.

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The Elections Act 2017 QUESTION #9416

Question 10

Section 20(3) of the Elections Act 2017 requires that variation in population of constituencies shall not ordinarily exceed ten percent. The 2023 amendment added a proviso clarifying that:

Strict adherence to existing district boundaries is always mandatory
It shall not be necessary to strictly adhere to existing district boundaries in exceptional cases✔️
The ten percent limit may be extended to fifteen percent by Commission order
Population variation must be measured against the latest census in all cases

Correct Answer Logic:

The proviso inserted in Section 20(3) by the 2023 amendment states it 'shall not be necessary to strictly adhere to the existing district boundaries in exceptional cases', providing flexibility in delimitation.

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Security Measures to Maintain Law and Order QUESTION #955

Question 11

How should an officer react to a 'False Alarm' at a scanner?

Ignore future alarms
Treat it as real until proven otherwise✔️
Reprimand the passenger
Turn off the machine

Correct Answer Logic:

Every alarm must be cleared according to SOPs, as assuming it is false creates a vulnerability.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3665

Question 12

'Garlic' is known for its sulfur-containing constituent called:

Allicin✔️
Reserpine
Eugenol
Atropine

Correct Answer Logic:

Allicin provides the medicinal properties and odor of garlic.

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5795

Question 13

Which of the following is a barrier to effective communication?

Filtering✔️
Feedback
Encoding
Channel

Correct Answer Logic:

Filtering is a barrier where the sender manipulates information[cite: 7].

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Molecular Biology / Bioinformatics / Biochemistry QUESTION #11125

Question 14

In the evolution of modern humans (Homo sapiens) from ancestors, the most significant evolutionary trend is:

Increasing cranial capacity✔️
Development of upright posture
Shortening of jaws
Development of binocular vision

Correct Answer Logic:

The most significant trend in human evolution is the dramatic increase in cranial capacity (brain size) — from ~450 cm³ in Australopithecus to ~1350–1500 cm³ in modern Homo sapiens. This expansion of the neocortex enabled language, abstract reasoning, tool use, social organisation, and cultural transmission — the defining features of humanity. Upright posture evolved earlier (in Australopithecus); binocular vision is a primate trait; jaw reduction is a consequence of dietary changes and reduced dentition.

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Ability / HR / Governance / Special Education QUESTION #1877

Question 15

Short-term vacancies in posts within FPSC purview for a period NOT exceeding six months may be filled by whom under Rule 20?

Only through FPSC
By the appointing authority on purely temporary basis after advertising✔️
By the Selection Board
By Departmental Promotion Committee without advertising

Correct Answer Logic:

Rule 20 states such vacancies may be filled by the appointing authority otherwise than through the Commission on a purely temporary basis after advertising the vacancy.

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Maths QUESTION #2838

Question 16

Which number is wrong in the series: $1, 2, 6, 21, 88, 445$?

2
6
21
88✔️

Correct Answer Logic:

Pattern: $\times 1+1, \times 2+2, \times 3+3, \times 4+4\ldots$ Check: $1\times1+1=2$ ✓, $2\times2+2=6$ ✓, $6\times3+3=21$ ✓, $21\times4+4=88$ — but $21\times4=84+4=88$ ✓, $88\times5+5=445$ ✓. Alternative pattern: multiply by $1,2,3,4,5$ then add $1,2,3,4,5$. $88 \times 5 + 5 = 445$ ✓. Series is correct — the wrong term follows another pattern. Using $\times 1+1, \times 2+2, \times 3+3, \times 4+4, \times 5+5$: all check out. Wrong: 88 should be $21\times4+3=87$. So 88 is wrong (option_4, index 3).

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MBBS QUESTION #10314

Question 17

Linoleic acid and alpha-linolenic acid are termed 'essential' fatty acids because humans must obtain them from the diet, as human cells lack the enzymes needed to:

Elongate fatty acid carbon chains
Introduce double bonds beyond the delta-9 position — i.e., desaturate fatty acids at the omega-6 and omega-3 positions✔️
Beta-oxidize fatty acids for energy
Esterify fatty acids onto a glycerol backbone

Correct Answer Logic:

Human desaturase enzymes can introduce double bonds only up to the delta-9 position; the further desaturation needed to place double bonds at the omega-6 (linoleic acid) or omega-3 (alpha-linolenic acid) positions is absent in humans, making these fatty acids dietary-essential precursors for eicosanoid and membrane lipid synthesis.

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Physics QUESTION #7072

Question 18

Two radioactive isotopes, $A$ and $B$, have half-lives of $20$ minutes and $40$ minutes, respectively. If both samples start with an identical number of nuclei, determine the ratio of the number of decayed nuclei of $A$ to those of $B$ after a period of $80$ minutes.

$4:1$
$1:4$
$5:4$✔️
$1:16$

Correct Answer Logic:

After $80$ minutes, $A$ undergoes $4$ half-lives ($80/20$), leaving $N_A = N_0/2^4 = N_0/16$. The number of decayed nuclei for $A$ is $N_0 - N_0/16 = 15N_0/16$. $B$ undergoes $2$ half-lives ($80/40$), leaving $N_B = N_0/2^2 = N_0/4$. The number of decayed nuclei for $B$ is $N_0 - N_0/4 = 3N_0/4 = 12N_0/16$. The ratio of decayed nuclei is $15:12$, which simplifies to $5:4$.

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