Explanation

Nickel is a micronutrient essential for the activity of the enzyme urease, involved in nitrogen metabolism.

It helps in converting urea into usable forms of nitrogen for plants.

Explanation

Carboxylic acids contain the carboxyl group (–COOH), which gives them their acidic properties.

This group consists of a carbonyl (C=O) and hydroxyl (–OH) bonded to the same carbon atom.

Explanation

Calcium oxalate accounts for ~70% of kidney stones, forming crystals when urine is concentrated.

It results from high oxalate intake (e.g., spinach, nuts) or metabolic imbalances.

Explanation

Portfolio Assessment: Involves a systematic collection of student work (e.g., essays, projects) to demonstrate progress and skills over time.

It provides a holistic view of learning, unlike one-time tests (formative/diagnostic).

Explanation

Cardinal directions are the four main directions:

1. North
2. South
3. East
4. West

Northeast is an intercardinal (or ordinal) direction, not a cardinal one.

Explanation

The sentence talks about a past event ("last birthday"), so past tense is needed.

"Were" is the correct past tense form of "are" for you.

Explanation

ATP (Adenosine Triphosphate) stores and transfers energy released in catabolism to drive anabolic reactions.

It acts as the main energy currency of the cell.

Explanation

A matrix A is symmetric if its transpose equals itself, i.e., A^T = A.

This means the elements are mirrored across the main diagonal.

Explanation

Encounter means کسی چیز کا سامنا کرنا

Experience means کسی واقعہ یا صورتحال سے گزرنا یا اس کا سامنا کرنا

Explanation

غزوہ خیبر کے دوران حضرت علیؓ نے قلعہ ناعم کو شجاعت کے ساتھ فتح کیا۔

اس موقع پر نبی کریم ﷺ نے فرمایا تھا: کل میں جھنڈا ایسے شخص کو دوں گا جو اللہ اور اس کے رسول سے محبت کرتا ہے اور اللہ و رسول بھی اس سے محبت کرتے ہیں۔