Questions

A yellow element that stinks when burned is Sulphur.

DNA is not a single stranded and does not have amino acids. Hence options, b & C are eiminated. Dna is a double helix structure containing nucleobase—either cytosine (C), guanine (G), adenine (A), or thymine (T)—as well as a monosaccharide sugar called deoxyribose and a phosphate group. 

Testosterone is the hormone which is associated with aggression.

CTRL + B is computer keyboard shortcut bolds selected text.

CTRL + I is used for making the selected text italic

SHIFT + CTRL + S used for SAVE AS option for any document or file.

Most known extrasolar planets most resemble to the planet Venus.

The first attempt in printing was made in England by William Caxton.

William Caxton was an English merchant, diplomat, and writer. He is thought to be the first person to introduce a printing press into England, in 1476, and as a printer was the first English retailer of printed books.