In the presence of lactose, the gene for beta-galactosidase is turned on by induction. The RNA polymerase binds to the promoter, in the presence of lactose. Lactose binds to repressor leading to structural changes so that it does not bind to the promoter. This leads to the production of beta-galactosidase which breaks the bond between glucose and galactose, for utilization of lactose.
Answer:
Full moon / Completely visible
New moon / Lies between earth and sun without blocking light\
Solar eclipse / Moon blocks sun
lunar eclipse / Earth blocks sun from moon
Explanation:
Answer:
a difficult to identify
Explanation:
you can identify this type of fossil by the following-
distinctive, widespread, abundant, and limited in geologic time.
<u>Answer</u>: B: the sequence of nucleotides in the DNA
<u>Explanation</u>:
Although there are only four nucleotides composing all DNA on Earth, the different order in which they are arranged will specify for different genes. The number of these genes and which of them are active, is what makes individuals unique.
Answer:
Characterization of exosomes has become a topic of interest in medical research and molecular biology because it can provide very valuable information for early detection, disease monitoring and development of effective treatments against cancer and autoimmune diseases. Exosomes are known as one type of secreted membrane vesicles that are responsible for intercellular communication by providing means for intercellular exchange of proteins, lipids, mRNA, miRNA and DNA, contributing to intercellular communication in relevant biological processes, playing an important role in the development of several diseases, and specifically, modulating cancer microenvironment and the immune response. Exosomes and its contents also have emerged as non‐invasive biomarkers for various diseases. Exosomes composition and quantity may be directly related to the pathological state of the patient, so the characterization of exosome could be of great relevance for diagnosis.
Explanation:
https://www.creative-biostructure.com/exosome-analysis-and-characterization-651.htm