Explanation

• Thymine is a pyrimidine nitrogenous base found in DNA.
• But normally absent in RNA, where uracil takes its place.
• The two pyrimidine bases in RNA are uracil (U) and cytosine (C).
• Adenine (A) and guanine (G) are purine bases found in both DNA and RNA.
• DNA contains A, T, G, C.
• RNA contains A, U, G, C.

Last verified on 25-10-2026

Explanation

• A kernel is the inner edible part of a nut.
• Similarly, the yolk is the inner part of an egg.
• Both pairs show a relationship between an inner part and the whole.

Last verified on 25-10-2026

Explanation

• Concise means مختصر اور نقطہ تک
• Lengthy means لمبا
• Verbose means بہت زیادہ الفاظ یا لمبی چوڑی تقریر کا استعمال

Last verified on 04-06-2026

Explanation

• “Earnings” means money received from work, activities, or campaigns.
• The plural verb “have” agrees with the plural-form noun “earnings.”
• The sentence means that money collected from the campaigns has been used to buy medical supplies, food, and educational materials.

Last verified on 25-10-2026

Explanation

• The First Law of Thermodynamics states that energy can neither be created nor destroyed, only transformed from one form to another.
• Hence, it is essentially the law of conservation of energy.

Last verified on 26-10-2026

Explanation

Formula: Total Charge Q = C_eq × V

Q = 20μF × 100V

Q = 20 × 10^-6 × 100

Q = 2000 × 10^-6

Q = 2 × 10^-3 C

Last verified on 26-10-2026

Explanation

e = L _ (ΔI / Δt)

ΔI = 8 - 0 = 8 A

Δt = 0.2 s

e = 160 V

160 = L _ (8 / 0.2)

160 = L * 40

L = 160 / 40 = 4 H

Last verified on 26-10-2026

Explanation

μ = Frictional Force / Normal Force

μ = Newton / Newton

Newton cancels, so it has no unit. It is dimensionless.

Last verified on 26-10-2026

Explanation

Force on charge: F = q(v x B)

If v is perpendicular to B (90°), force is always perpendicular to velocity, acting as centripetal force.

If v perpendicular to B: Circle

If v at some angle to B: Helix

If v parallel to B: Straight line

Last verified on 26-10-2026

Explanation

In SHM:

Total Energy = KE + PE = constant

At extreme positions:

Velocity = 0, so KE = 0

So PE = Total Energy

Therefore PE is maximum at extremes, and KE is maximum at mean position.

Last verified on 26-10-2026