Answer:
Adenine
Explanation:
This molecule is DNA. You can see two strands of nucleotides joined in the middle by hydrogen bonding.
This hydrogen bonding occurs between complementary nucleotides. Adenine is complementary to thymine, and cytosine is complementary to guanine. The appropriate base here is paired with T (thymine), so it must be A, adenine.
Natural Selection: <span>the process whereby organisms better adapted to their environment tend to survive and produce more offspring. hope this helps</span>
Ants and aphids live in a mutualistic relationship which is a sub-type of symbiosis. <span />
Answer:
The best answer to the question: When the ribosome reaches a stop codon on the mRNA, no corresponding tRNA enters the A site. If the translaton reaction were to be experimentally stopped at this point, which of the following would you be able to isolate, would be, A: An assembled ribosome with a polypeptide attached to the tRNA in the P site.
Explanation:
When mRNA is ready to be translated, ribosomal units assemble around the chain to begin the translation. In order for this translation to be correct, and follow a specific, and desired, pattern, the ribosome counts with a series of sites that, when they meet the appropriate signals in the mRNA sequences, it will know when to stop assembling tRNA and with it polypeptides. As such, once a ribosome meets what is known as a stop codon, tRNA and its consequently binding parts of a protein will also stop.
The P site is the second binding site for tRNA in a ribosome. During translation the P site is the one responsible for holding together tRNA and its attaching and growing polypeptide chain. When the process is ended by reaching a stop codon, the bond between the peptydil at the P site and tRNA is broken and the new protein is thus released. Therefore, if in a hypothetical situation, you were to stop the translation process precisely at the point where tRNA has entered the A site, which is the beginning of the translation sequence, you would be able to find the assembled ribosome, and the growing polypeptide chain attached to the already started tRNA on the P site.