Explanation

DNA contains deoxyribose sugar, not ribose.

Ribose sugar is found in RNA, not in DNA.

Explanation

A function is concave down on an interval if its second derivative is negative over that interval.

Graphically, this means the curve bends downward like an upside-down bowl.

Explanation

عرش کا مطلب ہے اونچا مقام یا آسمانی تخت، جب کہ فرش نیچے کی سطح کو کہتے ہیں۔

اس لیے عرش اور فرش ایک دوسرے کے ضد (متضاد) ہیں۔

Explanation

The do-while loop is useful when the loop must run at least once, even if the condition is false initially.

It's suitable when the number of iterations is not known in advance and depends on runtime conditions.

Explanation

In the Demonstration Method, the teacher performs and explains practically.

It helps students see the process in action for better understanding.

Explanation

The line "When pansies lift their eyes to mine" gives human qualities (lifting eyes) to flowers (pansies).

This is an example of personification, where non-human things are described as if they were human.

Explanation

Milk has a pH around 6.5, making it slightly acidic compared to bread and egg.

Eggs and bread are closer to neutral or slightly basic, especially egg whites.

Explanation

NH₄⁺ (ammonium ion) is formed by a coordinate covalent bond between nitrogen and an extra hydrogen.

Within NH₄⁺, atoms are bonded by covalent bonds.

NH₄⁺ and Cl⁻ are held together by an ionic bond.

Explanation

The complex [Cu(en)2]^+² contains 2 ethylenediamine (en) ligands.

Each en is a bidentate ligand, donating 2 lone pairs, so:

2 ligands × 2 = 4 coordinate bonds → Coordination number = 4

Explanation

In the sentence, "the little one" refers to a person (child), making "one" a noun.

It is a common noun used in place of a name or identity.