Explanation

The nucleolus is known as the factory of ribosomes.

The nucleolus is a dense region inside the nucleus.

It is responsible for producing ribosomal RNA (rRNA).

Ribosomes are assembled in the nucleolus before entering the cytoplasm.

Ribosomes play a key role in protein synthesis.

Explanation

Steel cans are coated with tin to prevent rusting and corrosion.

Tin provides a protective layer between steel and the beverage.

This ensures the drink remains safe and hygienic.

Explanation

Steel cans are coated with tin to prevent rusting and corrosion.

Tin provides a protective layer between steel and the beverage.

This ensures the drink remains safe and hygienic.

Explanation

AUG is the start codon in mRNA that signals the beginning of protein synthesis.

It codes for the amino acid Methionine in eukaryotes.

During translation, ribosomes recognize AUG to initiate protein assembly.

Stop codons like UAA, UAG, and UGA signal the end of translation.

Explanation

The chemical name for quartz is silicon dioxide

Chemical Formula: SiO₂

Composition: Silicon (Si) and Oxygen (O)

Structure: A framework of silicon-oxygen tetrahedra

Common Names: Silica, Rock Crystal (for the clear variety)

Explanation

• Olive, nuts, and avocado are rich sources of healthy fats and oils.
• These fats provide energy and help in absorption of fat-soluble vitamins.

Additional information:

• These foods also provide antioxidants, vitamins, and minerals, making them heart-healthy.

Last verified on 27-01-2026

Explanation

• Transpiration is the process by which plants lose water in the form of vapor from leaves, stems, and flowers.
• It helps in cooling the plant, nutrient transport, and maintaining water balance.

Additional information:

• Evaporation: Water loss from soil or water surfaces
• Respiration: Energy release by breaking down sugars
• Photosynthesis: Production of food using sunlight, CO₂, and water

Last verified on 27-01-2026

Explanation

• Spermatophytes are plants that produce seeds and usually bear flowers or cones.
• They are the most advanced group of plants.

Additional information:

• Spermatophytes: Angiosperms (flowering plants) and Gymnosperms
• Bryophytes: Non-vascular, no seeds
• Pteridophytes: Vascular but seedless

Last verified on 27-01-2026

Explanation

Oxygen is a vital component of the Earth's atmosphere (making up about 21%) and is essential for life

Therefore, oxygen is not considered a part of smog.

Smog in Pakistan mainly consists of harmful air pollutants.

These include sulphur dioxide, nitrogen oxides, and carbon monoxide.

Explanation

Tensile strength refers to a material’s ability to resist being pulled apart.

Bones have collagen fibers that provide high tensile strength.

This allows bones to withstand forces that try to stretch or bend them.