Differences between DNA and RNA include all of the following EXCEPT

Question

a. RNA is a molecule of nucleotides linked together.

b. RNA's sugar is ribose.

c. In RNA, uracil binds with adenine as a complementary base pair.

d. RNA consists of a single strand of nucleotides.

Is it c?

I know that both b and d are right. So now I'm left with a and c. It has to be c because adenine must pair with thymine because a=t and thymine IS the complementary base pair for adenine.

During transcription, the genetic information for making a protein is "rewritten" as a molecule of

translation, right?

When genetically engineering an organism, a plasmid

a. is the main chromosome of the bacteria that is cloned.

b. is cut with a restriction enzyme to accept the gene of interest.

c. helps screen for cells that did not take up the gene of interest.

d. combines with the gene of interest to make a replicating chromosome.

I'm unsure about a and I'm pretty sure its not b... so, I think its either c or d, right?

Answer 1

It's A.  Both RNA and DNA are a molecule of nucleotides linked together.  C isn't correct because Uracil does bind adenine in RNA but not DNA.

During transcription the genetic info for making a protein is rewritten as a molecule of RNA.  Translation is the process where the RNA message is used to make protein (using ribosomes).

I'm also going to go with "B" as the correct answer for the last question.  Although that's a very poorly worded question....

Answer 2

uracil does bind w/ adenine, cuz it replaces thymine which binds to adenine, i think it's a b/c rna's nucleotides aren't linked together, the nucleotide links occur w/ base pairs, it doesn't constitute the length of the molecule

Answer 3

1.  No, there is no thymine in RNA.  The answer is a. because both RNA and DNA have nucleotides that are linked together.

2.  The genetic information is DNA.  During transcription it is rewritten as RNA in the form of mRNA.

3.  The answer is b.  You cut the plasmid with the same restriction enzyme as the DNA holding the gene of interest and that creates sticky ends that allow you to insert the gene into the plasmid.