In short, the mRNA copy of a DNA sequence (with the replacement of Uracil for Thymine) then attaches to a ribosome (after it moves out of the nucleus and into the cytoplasm of the cell), and a molecule called a tRNA molecule will bring in the respective anti codons for each codon with the DNA sequence. The end goal of translation is the formation of a polypeptide, or a protein which is then used in various places of the body depending on the function of that protein.
Answer:
Rhizobium is a genus of bacteria associated with the formation of root nodules on plants. These bacteria live in symbiosis with legumes.
Explanation:
Opportunistic infections are infections that occur more frequently and are more severe in people with weakened immune systems, including people with HIV.
<span>A major volcanic belt known as the ring of fire circles the Pacific Ocean. The Pacific Ring of Fire </span><span>is an area where a large number of earthquakes and volcanic eruptions occur in the basin of the </span>Pacific<span> Ocean.</span>
Answer:
Please find the detailed explanation of this statement below
Explanation:
Firstly, a repressed gene is a gene whose expression has been inhibited or repressed. The lac operon in E.coli bacteria is a regulatory unit containing structural genes, a single promoter and operator regions. The promoter is the region where the transcription enzyme (RNA polymerase) binds to in order to transcribe the genes in the lac operon. The structural genes in the lac operon can only be expressed in the presence of lactose sugar.
However, in the absence of lactose, LAC REPRESSOR, which is a transcription factor (protein), prevents the binding of RNA polymerase to the PROMOTER region by binding to the OPERATOR region of the lac operon. This inhibits the expression of the lactose genes in the operon.
Note that, the structural genes in the lac operon (lacZ, lacY, lacA) code for proteins that help break down lactose sugar for energy in the E.coli bacteria. Therefore, a bacteria cell with a repressed lac operon will be unable to degrade lactose sugar.
