Explanation

• The Golgi body consists of stacks of flattened, membrane-bound sacs called cisternae.
• The Golgi apparatus modifies, sorts, and packages proteins and lipids received from the endoplasmic reticulum.
• These materials are packaged into vesicles for transport to other parts of the cell or for secretion outside the cell.

Last verified on 28-10-2026

Explanation

• Enzyme inhibition is commonly classified into two main types: reversible and irreversible inhibition.
• Reversible inhibition occurs when an inhibitor binds temporarily to an enzyme.
• Its common forms include competitive, non-competitive, and uncompetitive inhibition.
• Irreversible inhibition occurs when an inhibitor permanently inactivates an enzyme, often by forming a strong chemical bond.

Last verified on 28-10-2026

Explanation

• Microfilaments are thin, solid protein fibres found in the cytoskeleton of eukaryotic cells.
• They are approximately 7 nm in diameter.
• They are mainly composed of the protein actin.
• Microfilaments help maintain cell shape, support cell movement, and participate in muscle contraction and cell division.

Last verified on 28-10-2026

Explanation

• Viruses are not included because they are acellular.
• It means they lack a cellular structure.
• It can reproduce only inside living host cells.

Additional information:

• The five-kingdom classification was proposed by Robert H. Whittaker in 1969.
• The five kingdoms are Monera, Protista, Fungi, Plantae, and Animalia.

Last verified on 28-10-2026

Explanation

• Freshwater is water that contains a very low amount of salt, typically less than 1% salinity.
• Examples of freshwater sources include rivers, lakes, streams, and underground aquifers.

Last verified on 28-10-2026