Answer:
C. Non-covalent interactions between the protein and specific bases in the major groove of DNA
Explanation:
Activator or repressor proteins are proteins with specific DNA-binding domains that have affinity by one or two DNA strands. In general, these proteins interact with the major groove of the B-DNA structure since this structure exposes more functional groups for binding. Non-covalent interactions are a type of interaction that does not involve the sharing of electrons. The interaction between proteins and DNA is due to the combination of different non-covalent interactions, which can be classified into four major types: van der Waals, hydrophobic, hydrogen and ionic interactions.
Answer:
c. Cell division increases the mass of the original cell.
Explanation:
Cell division is a process of formation of daughter cells by dividing the existing cells. As the cells grow, their surface area to volume ratio reduces which means that a larger cell has a less surface area than its volume as compared to a smaller cell. Cells need to maintain a higher surface area to perform various biological functions. Therefore, after attaining certain growth, cells divide to increase their surface area and reduce their volume. Cell division reduces the mass of the parent cell. The newly formed cells grow to increase their mass.
It oxidies iron and inorganic sulfur compounds. The oxidation process can be harmful, as it produces sulfuric acid, which is a major pollutant. It has been suggested that T. ferrooxidans forms a symbiotic relationship with members of the genus Acidiphilium, a bacterial capable of iron reduction. Other species of Thiobacillus grow in water and sediment; there are both freshwater and marine strains.
The bacteria are usually found in rivers, canals, mine drainage effluents and mining areas. So there may be some source of these bacilli near their house.They require inorganic sources to grow and contain an enzyme called ferrous oxidase that allows them to metabolize iron.
<span>They eat iron pipes corroding the pipes leading into households and produce a thick slime layer biofilm.</span>
He needed to understand the concept of science to understand why it’s so important