Answer:
A. The complementary shapes of an enzyme and a substrate
Explanation:
The Lock-and-Key model was made to show how an enzyme's active zone fits a substrate and how they bond together. It correlates just like a lock and a key; you have to have the correct-shaped key in order to open a lock. Same process of thought with the enzymes; you must have the same shape for both in order to bind together,
DNA contains Deoxy ribose sugar. RNA contains ribose sugar. The DNA sugar contains one less molecule, hence the name De-oxy
I think the correct answer from the choices listed above is option B. Vector is the tool that is used to transfer a gene into an animal. The vector is a piece of DNA that is used to carry the specific segment of DNA you want transferred into the organism. Hope this answers the question.
I dont remember much of biology but i do remember my teacher saying something about phosphate backbone, i know its not much help. sorry!!
