Here, an enzyme such as DNA polymerase catalyzes a reaction in a first step and then checks that the product is correct in a second step. This two-step process results in average error rates of less than 1 error in 100 million reactions in high-fidelity mammalian polymerases.ere, an enzyme such as DNA polymerase catalyzes a reaction in a first step and then checks that the product is correct in a second step. This two-step process results in average error rates of less than 1 error in 100 million reactions in high-fidelity mammalian polymerases.
The correct answer is Mountains. Mountains can alter wind flow and create a rain shadow effect. A mountain is a large landform and is high surrounding a limited area. It is generally steeper and higher than a hill. Comments.
This is cloud. They are usually white by irregular reflection . Rain cloud is dark because their water drops are rather large and less transparent. There are many chances when cloud is formed. For example towering thundercloud is formed when air rises high up in the sky. ( I am Japanese and I am afraid my answer may be difficult to understand and contain grammatical errors.) Source(s):