Answer:
b. transcriptional control of gene expression.
Explanation:
The binding sites of transcription factors (enhancers and silencers) can activate or deactivate, respectively, a gene in specific parts of the body.
Some genes must be expressed in a part of the body. For example, if you need to activate a gene in the spine, skull and toes, but not in the rest of the body, how can transcription factors do this task?
As a gene of this type of pattern it can have several enhancers or silencers, where each one can activate or repress the gene of a specific type of cell or part of the body, joining transcription factors that occur in that specific part of the body.
Answer:
The correct answer is b. likely to be found in beta turns.
Explanation:
Proline is the amino acid which is unique from other amino acids as the side chain of proline is connected which gives it a cyclic structure. Beta turns are the secondary structure found in proteins that helps in the changing of direction of polypeptide chain in the protein.
The amino -acid proline is commonly found in beta turns because the unique cyclic structure of proline suits the beta-turn organization. Glycine is another amino acid that is abundant in beta turn because of its small size.
Therefore the correct answer is b. likely to be found in beta turns.
It's know as chemical equilibrium
Answer:
Pulmonary circulation
Explanation:
The pulmonary artery is a big artery that comes from the heart, so it splits into two main branches, and brings blood from the heart to the lungs.
Carbon has 4 valence electrons and can thus bond to 4 other atoms. Thats why it is called tetravelent. (2 electrons from the 2s orbital and 2 electrons from the 2p orbital contribute to a sp3 valence hybridization allowing carbon to form 4 bonds)
