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The dicrotic notch represents a brief backflow of blood toward the closing aortic valve, producing a small pressure rebound just after peak systolic pressure — marking the transition from systole to diastole.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3335

Question 2344

'Agglutination' is a reaction where:

Bacteria explode
Antibodies cause antigens (like bacteria) to clump together✔️
Bacteria turn blue
DNA is destroyed

Correct Answer Logic:

Agglutination tests are used for blood typing and identifying pathogens.

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Chemistry QUESTION #458

Question 2345

Al?O?(SiO?).2H?O is called

Clay✔️
Talc
Asbestos
None of these

Correct Answer Logic:

This is the formula for clay

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3128

Question 2346

Which part of the brain is responsible for coordinating balance and fine motor skills?

Cerebrum
Cerebellum✔️
Medulla Oblongata
Hypothalamus

Correct Answer Logic:

The cerebellum (little brain) manages posture and coordination.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3153

Question 2347

'Lymph' is essentially:

Pure blood
Filtered tissue fluid returned to the venous system✔️
A type of bile
Stomach acid

Correct Answer Logic:

Lymphatic vessels collect excess interstitial fluid and return it to the blood.

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General Knowledge QUESTION #8947

Question 2348

'Philately' is the hobby of:

Science of drugs
Stamp collection✔️
The study of written records
The study of animal behavior

Correct Answer Logic:

Philately is stamp collecting.

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Chemistry QUESTION #1074

Question 2349

Assertion (A): Alkyl iodide (R–I) undergoes S\(_N\)2 reaction faster than alkyl chloride (R–Cl). Reason (R): Iodine is a better leaving group because of its large size.

A is true but R is false
A is false but R is true
Both A and R are true and R is the correct explanation of A✔️
Both A and R are true but R is not the correct explanation of A

Correct Answer Logic:

Both A and R are true. R–I reacts faster in S\(_N\)2 than R–Cl because I\(^-\) is a much better leaving group — it is larger, more polarizable, and the C–I bond is weaker. The large size of iodine means the C–I bond is longer and weaker, making it easier to break. R correctly explains A.

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Quantitative Reasoning QUESTION #8044

Question 2350

ARRHYTHMIC: Choose the word most nearly opposite in meaning to this word.

timely
subordinate
terminal✔️
lacking precision

Correct Answer Logic:

ARRHYTHMIC means lacking a regular rhythm or pattern — irregular. Its antonym is exhibiting regularity (option E, placed here as option 4). Exhibiting regularity directly opposes arrhythmic by meaning consistent, patterned, and rhythmic. 'Timely' refers to punctuality. 'Lacking precision' is actually similar in meaning, not opposite.

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Economics QUESTION #1686

Question 2351

According to Keynes's liquidity preference theory, the relationship between the money supply and the rate of interest is best characterised as:

Negative — a higher money supply leads to a lower interest rate✔️
Positive — a higher money supply leads to a higher interest rate
Indirect — the relationship is mediated through the price level
No systematic relationship exists between the two

Correct Answer Logic:

In Keynes's Liquidity Preference Theory, the interest rate is determined by the supply of and demand for money. Given a fixed money demand curve, an increase in money supply shifts the supply curve rightward, lowering the equilibrium interest rate. The relationship is therefore negative (inverse): \(\uparrow M_s \Rightarrow \downarrow r\). This is the mechanism through which monetary policy affects investment and aggregate demand in the Keynesian framework.

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Biology Zoology Botany QUESTION #1348

Question 2352

The evolution of ecologically related species is sometimes co-ordinated such that each species exerts a strong selective influence on others. This is:

Coexistence
Coevolution✔️
Mutualism
None of these

Correct Answer Logic:

Coevolution is the process by which two or more species reciprocally affect each other's evolution through natural selection. Classic examples include plant-pollinator relationships, predator-prey arms races, and host-parasite interactions. Mutualism is a type of symbiosis (both benefit) that can result from coevolution, but coevolution is the broader evolutionary process.

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English QUESTION #2687

Question 2353

Identify the correct modal for 'prohibition': 'You ___ park your car in front of the gate.'

could not
must not✔️
may not
need not

Correct Answer Logic:

'Must not' is used to express a strong prohibition or rule.

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Islamic Studies QUESTION #643

Question 2354

In the battle of Tabuk the Holy Prophet (ﷺ) led an army containing ________ men.

40,000
30,000✔️
50,000
None of these

Correct Answer Logic:

The Muslim army for the expedition to Tabuk consisted of 30,000 soldiers.

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Home Economics QUESTION #6267

Question 2355

A deficiency of Vitamin B12 (Cobalamin) is most commonly associated with which type of anemia?

Pernicious Anemia✔️
Iron Deficiency Anemia
Aplastic Anemia
Sickle Cell Anemia

Correct Answer Logic:

Pernicious anemia is caused by the body's inability to absorb B12 due to a lack of intrinsic factor.

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Chemistry QUESTION #1085

Question 2356

For the reaction \(\text{C(s)} + 2\text{H}_2\text{(g)} \to \text{CH}_4\text{(g)}\); \(\Delta H = -74.8\ \text{kJ mol}^{-1}\). Which diagram accurately represents this reaction?

Diagram with R higher than P by 74.8, with activation energy hump above R
Diagram with P higher than R by 74.8, with R lower
Diagram with R and P at same level, hump of 74.8 above
Diagram with P lower than R by 74.8 kJ, hump above R then drop to P✔️

Correct Answer Logic:

Since \(\Delta H = -74.8\ \text{kJ mol}^{-1}\) (exothermic), products (P) are lower in energy than reactants (R) by 74.8 kJ. The diagram should show R at higher energy, a transition state hump above R, then P at lower energy with the difference being 74.8 kJ. Option (4) correctly shows this: R is lower baseline, hump above, P drops 74.8 below R.

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Math Physics Chemistry Biology QUESTION #4330

Question 2357

According to the Lock and Key model, the active site is regarded as:

Rigid and specific✔️
Flexible and specific
Rigid and non-specific
Flexible and non-specific

Correct Answer Logic:

The Lock and Key model (Fischer, 1894) proposes that the enzyme active site has a fixed, rigid shape that is exactly complementary to a specific substrate — rigid and specific.

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Dairy Food Science and Technology QUESTION #5948

Question 2358

Which cheese variety is classified as a mold-ripened cheese where mold grows on the surface?

Cheddar
Gouda
Camembert (\(Penicillium\;camemberti\) surface mold)✔️
Emmental

Correct Answer Logic:

Camembert and Brie are surface mold-ripened cheeses where \(Penicillium\;camemberti\) (white mold) grows on the rind. Proteolytic and lipolytic enzymes diffuse inward, ripening the cheese from outside in. In contrast, blue cheeses have \(Penicillium\;roqueforti\) growing internally.

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Paper-II (Pharmacology and Social Behaviour, Law & Ethics and Computer Sciences) QUESTION #5793

Question 2359

The Provincial Quality Control Board (PQCB) consists of how many members (minimum/total)?

3
5✔️
7
9

Correct Answer Logic:

The PQCB must have at least 5 members[cite: 7].

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General Ability and Fire Fighting QUESTION #5590

Question 2360

What is the fourth element added in the Fire Tetrahedron that is not present in the Fire Triangle?

Water
Carbon Dioxide
Chemical Chain Reaction✔️
Pressure

Correct Answer Logic:

Modern fire science adds the Chemical Chain Reaction as a fourth element to form the Fire Tetrahedron. This self-sustaining molecular breakdown keeps the fire going even if basic elements are marginally present.

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