Which of the following gases is mainly responsible for the greenhouse effect? MCQ with Answer and Explanation

Explanation:
While restriction enzymes were first observed by Linn and Arber, the first Type II restriction endonuclease (HindII), which is the type used in genetic engineering because it cuts at specific recognition sites, was isolated and characterized by Hamilton O. Smith, Kent W. Wilcox, and Thomas J. Kelly in 1970 from Haemophilus influenzae. For this discovery, Smith shared the Nobel Prize in Physiology or Medicine in 1978. Kary Mullis invented PCR.

Explanation:
DNA fingerprinting analyzes VNTRs, often amplified by PCR, and is used in forensics and paternity. All three are correct.

Explanation:
Plant cell walls are primarily cellulose. Fungal walls contain chitin, bacterial peptidoglycan, animal cells lack a cell wall.