Daily Current Affairs Quiz: February 27, 2026

1. Mitochondrial diseases are caused by mutations in mitochondrial DNA, which is distinct from nuclear DNA.
2. Mitochondria are passed down exclusively from the mother because the egg contributes the cytoplasm (and thus mitochondria) to the embryo, while sperm contributes only nuclear DNA.
3. This leads to a maternal inheritance pattern, meaning all children of an affected mother may inherit the condition, but children of an affected father will not.

1. Lemongrass contains citronella oil, a natural compound widely recognized for its mosquito-repelling properties.
2. It is commonly used in natural mosquito repellents, candles, sprays, and essential oils.
3. Congress grass, Elephant grass, and Nut grass do not have the same mosquito-repelling properties and are not typically used for this purpose.

Carbon nanotubes (CNTs) are nanoscale cylindrical structures made of carbon atoms.

In biomedical applications, they are valued because:

1. They can act as drug carriers, delivering therapeutic molecules directly to targeted cells.
2. They are used in biosensors, where their high electrical conductivity and large surface area make them highly sensitive for detecting biomolecules.
3. They also show promise in tissue engineering and imaging.

Blockchain technology is essentially a decentralized digital ledger that records transactions across multiple computers.

Its key features are:

1. Distributed system: Data is stored across a network of nodes, not on a single central server.
2. Tamper-resistance: Once a block of data is added, it is cryptographically linked to the previous block, making alterations extremely difficult.
3. Transparency: All participants can view the ledger, ensuring trust without a central authority.

Drones are increasingly used in governance and development because they provide:

1. Remote sensing: Collecting aerial data for mapping, agriculture, disaster management, and urban planning.
2. Surveillance: Monitoring traffic, borders, forests, and public spaces for safety and resource management.

Delivery services: Transporting medical supplies, vaccines, and essential goods to remote or disaster-hit areas.