science & technology Online Quiz - 393

Einstein received the Nobel Prize in Physics in 1921. This is one of the original Nobel categories established in Alfred Nobel's will. Astronomy and Military are not Nobel Prize categories.

In physics, lowercase 'c' is the standard symbol for the speed of light in vacuum (approximately 3×10^8 m/s). This is a fundamental constant in physics, used in equations like E=mc². Carbon's symbol is 'C' (uppercase), not 'c'.

ICMP stands for Internet Control Message Protocol, which is a network layer protocol used for error reporting and diagnostic functions in IP networks. It's commonly used by tools like ping and traceroute to test network connectivity and diagnose problems. ICMP messages are typically generated by routers or hosts when network errors occur. Options A, B, and C are incorrect as they don't represent the actual meaning of the ICMP acronym.

SSL (Secure Sockets Layer) is a cryptographic protocol designed to provide secure communication over computer networks. It operates at the transport layer to encrypt data between client and server, ensuring privacy and data integrity. SSL was the predecessor to TLS (Transport Layer Security).

LCP (Link Control Protocol) is a component of PPP (Point-to-Point Protocol) used to establish, configure, maintain, and terminate point-to-point connections. It handles link quality monitoring and parameter negotiation between connected devices.

PPTP stands for Point-to-Point Tunneling Protocol. It is a network protocol used to implement VPN tunnels between public networks. It was developed by a consortium including Microsoft and is one of the oldest VPN protocols.

MAC (Media Access Control) is a sublayer of the Data Link Layer in the OSI model that controls how devices access and share the communication medium. Every network interface has a unique MAC address for identification on the local network.

DNA stands for Deoxyribonucleic Acid. Option B 'Di-oxy ribo nucleic acid' captures the correct components: deoxyribose sugar + nucleic acid. Option A has 'diribonucleic' which is misspelled. Option C is just RNA. Option D is incomplete.

IVF stands for In Vitro Fertilization, a medical technology where fertilization happens outside the body ('in glass' = in vitro). Options A and C incorrectly say 'viable fragments'. Option B incorrectly says 'fertile' instead of 'fertilization'.

mRNA (messenger RNA) carries genetic information from DNA to ribosomes for protein synthesis. This is a fundamental concept in molecular biology - the 'central dogma' flows DNA → mRNA → protein. This statement is scientifically accurate.

The first complete nucleotide sequence of a tRNA molecule was determined in 1965 by Robert W. Holley and colleagues at Cornell University, for alanine tRNA from yeast. This was a landmark achievement in molecular biology.

A corm is an underground stem modification that exhibits dormancy, allowing plants to survive unfavorable conditions. Examples include taro and crocus. Beetroot, carrot, and potato are other root/tuber modifications but the question specifically asks which shows dormancy as a characteristic feature.

The Musaceae family (which includes banana and plantain) exhibits parallel venation in their leaves. This is characteristic of monocot plants, where veins run parallel to each other from base to tip rather than forming a network.

Beetroot is a modified root, specifically a taproot modification used for food storage. Unlike carrots (also taproots) or potatoes (tubers which are modified stems), beetroot stores nutrients in its root structure underground.

Modified leaves can indeed help in capturing nitrogen in nitrogen-deficient plants, particularly in insectivorous plants like pitcher plants, sundews, and Venus flytraps. These plants have leaves modified into traps that capture insects, supplementing their nitrogen requirements from poor soil conditions. The statement is true.

Allium cepa is the scientific name for onion, which belongs to the family Alliaceae. Lilliaceae (lily family) is a related but distinct family. Poeaceae is the grass family and Musaceae is the banana family - neither is correct for onions.

The atomic number specifically indicates the number of protons in an atom's nucleus. This number defines the element and determines its position in the periodic table. Atomic mass includes both protons and neutrons, while atomic charge is the net electrical charge (protons minus electrons).

Leucippus (5th century BC) is credited as the founder of atomism, though his student Democritus developed and popularized the theory. Lucretius was a Roman poet who later wrote about atomism, and Epicurus adopted atomist philosophy but didn't found it. Many textbooks incorrectly attribute atomism's founding solely to Democritus.

Biogenesis comes from Greek 'bios' (life) and 'genesis' (birth/origin), referring to the principle that life arises from pre-existing life. The other options pair life with unrelated concepts - death is the opposite of life, reproduction and repair are biological processes, and growth is a characteristic of life.