Explanation

• Ribosomes are the sites of protein synthesis in the cell.
• They read genetic instructions (mRNA) and assemble amino acids into proteins.
• They can be found free in the cytoplasm or attached to rough ER.
• They are made of RNA and proteins.
• They are present in both prokaryotic and eukaryotic cells.

Last verified on 06-05-2026

Explanation

• A velocity–time graph shows how velocity changes with time.
• The slope gives acceleration.
• The area under the graph represents motion covered.
• It connects velocity with displacement.

Last verified on 22-05-2026

Explanation

• The Battle of Badr is the first battle of Islam
• On 17 Ramadan, 2 AH (March 13, 624 CE)
• "Badr" means "full moon" in Arabic.
• Also called Furqan and The Day of the Criterion.
• Took place in the valley of Badr, located in the Hejazi region
• Muslims: Approx. 313 men (82 Muhajirun and 231 Ansar).
• Quraysh: Approx. 1000 soldiers led by Abu Jahl.
• 82-85 Muhajirun and 231 Ansar (61 from Aws and 170 from Khazraj).
• 2 horses and 70 camels.
• Fourteen Muslims were killed, while 70 Kufar were killed and 70 captured.

Last updated question by NA 22-April-2026

Explanation

• Enzymes sometimes need a non-protein component to function properly.
• This non-protein part is called a cofactor.
• If it is loosely attached, it can easily separate from the enzyme.
• Cofactors help enzymes carry out biochemical reactions.
• They may be inorganic ions or organic molecules.

Last verified on 10-04-2026

Explanation

Explanation

• Animal cells do not have chloroplasts, as they are not capable of photosynthesis.
• Animal cells also do not have a cell wall, unlike plant cells and some other organisms.

The components of an animal cell:

• Cell Membrane
• Cytoplasm
• Small Vacuole
• Nucleus
• Chromosomes

Last verified on 18-03-2026

Explanation

• Mitochondria are known as the powerhouse of the cell.
• They are the site of cellular respiration, where glucose is converted into ATP (energy).
• Mitochondria have a double membrane and their own DNA and ribosomes.
• They provide energy for all cell activities.

Last verified on 13-03-2026

Explanation

Explanation

Oxidation is a chemical reaction involving the loss of electrons. 

Oxidation:

When a substance loses electrons during a chemical reaction, it is said to be oxidized. 

Reduction:

The opposite of oxidation is reduction, which is when a substance gains electrons.

Last verified on 08-02-2026

Explanation

Step 1: Find the pattern (differences)

6 − 2 = 4

12 − 6 = 6

20 − 12 = 8

30 − 20 = 10

42 − 30 = 12

The differences increase by 2 each time:

4, 6, 8, 10, 12, 14

Step 2: Find the next term

Next number = 42 + 14 = 56