Daily Current Affairs Quiz: August 23, 2025

Answer: C [1, 2 and 4 only]
Explanation:

Statement 1 is correct: Nanomaterials are widely used in targeted drug delivery, allowing medicines to reach specific tissues or cells, reducing side effects and improving treatment efficiency.

Statement 2 is correct: Nanomaterials are used in biosensors that enable early detection of diseases such as cancer or infections, enhancing diagnostic accuracy.

Statement 3 is incorrect: Nanomaterials are highly effective in imaging techniques like MRI and fluorescence imaging because their small size allows them to interact at the cellular level, improving image resolution.

Statement 4 is correct: Nanomaterials play a key role in regenerative medicine, including tissue engineering and wound healing, by supporting cell growth and tissue repair.

Answer: A [1, 2 and 4 only ]
Explanation:

Statement 1 is correct: IoT security refers to the set of practices aimed at securing Internet-connected devices and networks within the IoT ecosystem to prevent unauthorized access and misuse.

Statement 2 is correct: The major concern of IoT security is protection against cyber threats such as malware, phishing, ransomware, and denial-of-service attacks targeting IoT devices and platforms.

Statement 3 is incorrect: IoT devices often require additional security measures because they have unique vulnerabilities, limited computational resources, and diverse connectivity, making them more prone to attacks than traditional network devices.=

Statement 4 is correct: Basic best practices for IoT security include using strong, unique passwords, enabling multi-factor authentication, and performing regular firmware/software updates to patch vulnerabilities.

Answer: C [1, 3, and 4 only]
Explanation:

Statement 1 is correct: Nanomedicine refers to the use of nanotechnology in healthcare for diagnosis, treatment, monitoring, and prevention of diseases at the molecular and cellular level.

Statement 2 is incorrect: Nanomedicine does not increase side effects; instead, it aims to reduce side effects by enhancing drug specificity, improving delivery efficiency, and lowering dosage requirements compared to traditional medication.

Statement 3 is correct: Targeted drug delivery is a key application of nanomedicine, allowing drugs to directly target diseased cells while sparing healthy cells, thereby improving treatment outcomes and minimizing toxicity.

Statement 4 is correct: Research is ongoing on nanorobots (nano-scale machines) for advanced medical applications, including delivering drugs at precise locations and potentially performing complex minimally invasive surgeries in the future.

Answer: D [1, 2 and 4 only]
Explanation:

Statement 1 is correct: Prahaar is designed to bridge the gap between multi-barrel rocket launchers and other short-range ballistic missiles. It is a quick-reaction, all-weather, road-mobile, solid-fuel missile with a range of 150 km.

Statement 2 is correct: Prithvi-II is a surface-to-surface short-range ballistic missile. It uses liquid fuel and has a range of 350 km.

Statement 3 is incorrect: Shaurya is a canister-launched hypersonic surface-to-surface quasi-ballistic missile. Its range is 750-1900 km, not 700 km.

Statement 4 is correct: Nirbhay is a long-range, all-weather, subsonic cruise missile designed for land attack and anti-ship missions, with a range exceeding 1000 km.

Answer: A [1, 2, and 4 only]
Explanation:

Statement 1 is correct: India has a two-layered ballistic missile defense system.

Statement 2 is correct: The Prithvi Air Defence (PAD) system intercepts missiles at exo-atmospheric altitudes (above 50 km).

Statement 3 is incorrect: The Akash missile is a surface-to-air missile, not an anti-ballistic missile.

Statement 4 is correct: The Advanced Air Defence (AAD) system intercepts missiles at endo-atmospheric altitudes (below 50 km).

India’s Ballistic Missile Defense (BMD) system is designed to intercept incoming ballistic missiles at different altitudes. It consists of two main layers:

Exo-Atmospheric Interceptor (Above 50 km Altitude) – Prithvi Air Defence (PAD): Intercepts missiles at high altitudes (above 50 km in space). It uses the Prithvi Air Defence (PAD) interceptor.

Endo-Atmospheric Interceptor (Below 50 km Altitude) – Advanced Air Defence (AAD): Intercepts missiles within the Earth’s atmosphere (below 50 km). It is designed for Short-Range and Medium-Range Ballistic Missiles.