B. Guanine is always paired with cytosine
Answer:
<em>Some </em><em>cell</em><em>s</em><em> </em><em>don't </em><em>divide </em><em>and </em><em>last </em><em>you </em><em>a </em><em>life </em><em>time </em><em>such </em><em>as </em><em>many </em><em>of </em><em>those </em><em>in </em><em>the </em><em>central </em><em> </em><em>nervous</em><em> </em><em>system </em><em>other </em><em>c</em><em>ells </em><em>such </em><em>as </em><em>stems </em><em>called </em><em>cell </em><em>population</em><em>s</em><em> </em><em>have </em><em>their </em><em>telemeres </em><em>repeatedly</em><em> </em><em>exten</em><em>d</em><em>ed </em><em>by </em><em>the </em><em>enzyme </em><em>telomerase </em><em>other </em><em>cells </em><em>are </em><em>never </em><em>repla</em><em>c</em><em>ed </em><em>and </em><em>live </em><em>as </em><em>long </em><em>as </em><em>we </em><em>do </em><em>.</em>
<em><u>I </u></em><em><u>hope this </u></em><em><u>answer </u></em><em><u>might </u></em><em><u>help</u></em><em><u> </u></em><em><u>u </u></em>
(A) Cells make proteins
Proteins are composed of amino acids. Proteins are made in a process called translation, in which the cell commands.
(B) RNA molecules copied before mitosis begins
DNA molecules are copied before mitosis, not RNA.
(C) mRNA molecules are transcribed to form tRNA
DNA is used as template to form both mRNA and tRNA in a process called transcription.
(D) polypeptides are made into mRNA
mRNA is the template used to make polypeptides in a process called translation.
Therefore, A is the right answer.
Answer:
C is the correct answer for my oppinion
To say that there is a "proofreading" function in DNA replication means that the DNA polymerase will be eliminating an improper nucleotide if it develops extra and it will exchange it with the right nucleotide so there are very few mistakes.
