DNA is an example of a complex biological polymer called a nuclei acid. Nucleic acids are made up of many smaller sub units called nucleotides. The components of a DNA nucleotide are deoxyribose, phosphate group, nitrogen group. There are four possible bases in a DNA molecules which includes adenine, cytosine, guanine and tymine.
Answer:
(d). B-cells.
Explanation:
Adaptive immunity can be described as immunity which develops in response to exposure to a pathogen (or foreign molecule). throughout the life. It is divided into two types, humoral immunity and cell-mediated immunity.
Humoral immunity is mediated by B cells that secrete antibodies against particular antigens. These antibodies recognize and neutralize the antigens and activate cell-mediated immunity, which is mediated by T cells.
Thus, the correct answer is option (d).
The answer will be A-U-G-G-A
Transcription is the process by which DNA molecule is used as a primer to generate and mRNA, catalyzed by the enzyme RNA polymerase. The process takes place in the nucleus, after which the mRNA is taken to the cytoplasm for translation. One of the differences between RNA and DNA is the base thyamine and base Uracil, RNA contains base Uracil instead of thyamine.
Answer:
The part of the enzyme where the substrate fits is known as the: active site
Explanation:
Enzymes work by bringing reactants together at a higher energy level than they would need in an uncatalyzed reaction.
