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Statistics QUESTION #1973

Question 2021

For a paired t-test conducted on $n$ matched pairs of observations, the appropriate degrees of freedom is:

$2n - 1$
$n - 2$
$2(n - 1)$
$n - 1$✔️

Correct Answer Logic:

In a paired t-test, the $n$ differences $d_i = X_{1i} - X_{2i}$ are treated as a single sample. The degrees of freedom is therefore $n - 1$, just as for a one-sample t-test.

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Education QUESTION #1487

Question 2022

Pavlov's Classical Conditioning experiment demonstrated that dogs could be trained to salivate at the sound of a bell. This bell is an example of:

Unconditioned stimulus
Conditioned (neutral) stimulus✔️
Operant response
Primary reinforcer

Correct Answer Logic:

The bell is a neutral/conditioned stimulus. Pavlov paired it with food (unconditioned stimulus) until the dogs salivated at the bell alone, demonstrating Classical Conditioning.

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Biology QUESTION #4231

Question 2023

CFTR gene that encode a protein which regulate:

Protein and salt
Salt and Water✔️
Sugar and Water
Liquid and Protein

Correct Answer Logic:

CFTR regulates salt and water transport.

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Math (Module-1) QUESTION #5469

Question 2024

$2.5b + 5r = 80$ describes the relationship between birds ($b$) and reptiles ($r$) cared for. If the business cares for $16$ reptiles, how many birds can it care for?

5
40
80

Correct Answer Logic:

Substitute $r = 16$: $2.5b + 5(16) = 80 \implies 2.5b + 80 = 80 \implies 2.5b = 0 \implies b = 0$.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3678

Question 2025

'Pharmacognosy' contributes to the development of new drugs by:

Providing leads from nature
Identifying toxic plants
Ensuring the purity of natural products
All of these✔️

Correct Answer Logic:

Natural products remain a massive source for drug discovery.

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Biology QUESTION #4301

Question 2026

The function of nucleolus is to make:

rDNA
Lysosomes
Ribosomes✔️
Chromosomes

Correct Answer Logic:

The nucleolus is a dense region within the nucleus responsible for synthesizing ribosomal RNA (rRNA) and assembling ribosomal subunits.

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Education QUESTION #1486

Question 2027

Which psychologist is known as the 'Father of Modern Educational Psychology' and founder of Behavioral Psychology?

Ivan Pavlov
B.F. Skinner
Edward Thorndike✔️
Jean Piaget

Correct Answer Logic:

Edward Thorndike is called the Father of Modern Educational Psychology and founder of Behavioral Psychology. He developed the concept of Connectionism and the three laws of learning.

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Physics and Math QUESTION #737

Question 2028

The time period of a second pendulum from its extreme to mean position:

T
T/4
T/2
2 sec✔️

Correct Answer Logic:

A second pendulum has T = 2 seconds for a complete oscillation. From extreme to mean position is T/4 = 0.5 s. The answer '2 sec' refers to the full time period of a second pendulum.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3356

Question 2029

'Aflatoxins' are toxic compounds produced by certain:

Bacteria
Viruses
Molds (Fungi)✔️
Algae

Correct Answer Logic:

*Aspergillus* species produce aflatoxins on stored grains/nuts.

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City and Regional Planning QUESTION #4952

Question 2030

In housing design, what is the recommended minimum room height for habitable spaces?

2.1 meters
2.4 meters
2.7 meters✔️
3.0 meters

Correct Answer Logic:

Building codes typically require minimum 2.7 meters (approximately 9 feet) ceiling height for habitable rooms to ensure adequate ventilation, light distribution, and comfortable living conditions.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3461

Question 2031

'Collagen' is the most abundant protein in the human body and is a:

Globular protein
Fibrous protein✔️
Enzyme
Hormone

Correct Answer Logic:

It provides structural support to skin, bones, and tendons.

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General Knowledge QUESTION #179

Question 2032

The G20 Summit meeting was held in _______ in 2024.

Costa Rica
Rio de Janeiro✔️
Tokyo
None of these

Correct Answer Logic:

Brazil hosted the 2024 G20 summit in Rio de Janeiro.

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Biology QUESTION #4288

Question 2033

Which is the common feature between cardiac and smooth muscles?

Voluntary
Involuntary✔️
Branched
Unbranched

Correct Answer Logic:

Both cardiac and smooth muscles are involuntary — they operate without conscious control, unlike skeletal muscle which is voluntary.

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Reading and Writing (Module-1) QUESTION #5452

Question 2034

Notes: Haudenosaunee Confederacy (1,000-year alliance of six nations, Great Law of Peace). Bruce Johansen believes Great Law influenced US Constitution (influence theory). Which choice presents this theory to an unfamiliar audience?

Bruce Johansen believes the Great Law was very influential.
Influence theory is supported by Franklin and Jefferson studying the Confederacy.
Influence theory holds that principles of the Great Law of Peace, a centuries-old agreement binding six Native nations in the northeastern US, influenced the US Constitution.✔️
Native people influenced US founding in many ways.

Correct Answer Logic:

Option C clearly defines the theory and explains the Great Law for an unfamiliar audience.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3042

Question 2035

A 'Light-resistant' container protects the drug from:

Air
Moisture
Actinic (UV) light✔️
Temperature

Correct Answer Logic:

Light-resistant (usually amber) containers prevent photodegradation.

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Biology QUESTION #4295

Question 2036

The following is an example of a globular protein:

Keratin
Collagen
Hemoglobin✔️
Histone

Correct Answer Logic:

Hemoglobin is a classic globular protein — roughly spherical, water-soluble, and has a functional/metabolic role (oxygen transport). Keratin and collagen are fibrous proteins.

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Physics QUESTION #1065

Question 2037

A 2 A current flows through two circular coils with radii ratio 1:2. Ratio of their magnetic moments is:

2:1
4:1
1:4✔️
1:2

Correct Answer Logic:

Magnetic moment $\mu = IA = I\pi r^2$. Same current $I$. Ratio: $\frac{\mu_1}{\mu_2}=\frac{r_1^2}{r_2^2}=\frac{1^2}{2^2}=\frac{1}{4}$. So $\mu_1:\mu_2=1:4$.

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