The purines associated with DNA include adenine and guanine and the pyrimidines include cytosine and thymine. Adenine bonds with thymine and cytosine bonds with guanine. All of the responses are correct except that eukaryotic DNA is found in the nucleus, cytoplasm, and ribosomes. In eukaryotes, DNA is only found in the nucleus, mitochondria, and only sometimes free floating in the cytoplasm. DNA is not found in ribosomes. RNA on the other hand, is found in the nucleus, cytoplasm, and ribosomes.
Note that since prokaryotes lack membrane-bound organelles, their DNA is free-floating in the cytoplasm. If you've found an issue with this question, please let us know. With the help of the community we can continue to improve our educational resources. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.
Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.
Hanley Rd, Suite St. Louis, MO We are open Saturday and Sunday! Subject optional. Email address: Your name:. Example Question : High School Biology. Possible Answers: Ribose. Correct answer: Deoxyribose.
Explanation : DNA stands for "deoxyribonucleic acid. Report an Error. Which of the following might you find in the backbone of DNA? Phosphate group II. Hexose sugar III. Possible Answers: I only. Correct answer: I only. Example Question 3 : Dna Structure. Possible Answers: Phosphodiesterase is needed to break the bonds between the phosphate group on the 5' carbon of one sugar and hydroxyl group on the 3' carbon of the adjacent sugar.
Correct answer: Phosphodiesterase is needed to break the bonds between the phosphate group on the 5' carbon of one sugar and hydroxyl group on the 3' carbon of the adjacent sugar.
Explanation : A DNA molecule is made up of multiple nucleotides that are connected by phosphodiester bonds. Example Question 4 : Dna Structure. Possible Answers: The two strands are antiparallel and the 5' end on both strands contain a phosphate group. The two strands are parallel and the 5' ends on both strands contain a phosphate group. Correct answer: The two strands are antiparallel and the 5' end on both strands contain a phosphate group. Explanation : In the nucleus, DNA is always found as a double-stranded molecule.
Example Question 5 : Dna Structure. The RNA backbone has uracil instead of thymine. The sugar in the RNA backbone has an extra hydroxyl group. Correct answer: The sugar in the RNA backbone has an extra hydroxyl group.
Explanation : RNA and DNA are both types of nucleic acids; therefore, both molecules are made from nucleotide monomers. Example Question 6 : Dna Structure. Possible Answers: Positive. Correct answer: Negative. Explanation : Given the backbone of DNA, with the phosphate group attached to the deoxyribose via a phosphodiester bond, DNA is negatively charged.
Example Question 7 : Dna Structure. Which of these can be found in the DNA backbone: I. On on the other hand, the sugar in the backbone of RNA is called ribose. These two sugars only differ by one -OH group being changed to an -H, but provides different capabilities for each molecule [2]. Jump to: navigation , search. Personal tools Log in. Namespaces Page Discussion.
Views Read View source View history. This page was last modified on 4 December , at Published: December 18, Last Updated: November 11, DNA encodes all genetic information, and is the blueprint from which all biological life is created.
In the long-term, DNA is a storage device, a biological flash drive that allows the blueprint of life to be passed between generations 2. RNA functions as the reader that decodes this flash drive. This reading process is multi-step and there are specialized RNAs for each of these steps. Below, we look in more detail at the three most important types of RNA. The nitrogen bases in DNA are the basic units of genetic code, and their correct ordering and pairing is essential to biological function.
The four bases that make up this code are adenine A , thymine T , guanine G and cytosine C. Bases pair off together in a double helix structure, these pairs being A and T, and C and G.
RNA molecules, by comparison, are much shorter 3. Eukaryotic cells, including all animal and plant cells, house the great majority of their DNA in the nucleus, where it exists in a tightly compressed form, called a chromosome 4.
This squeezed format means the DNA can be easily stored and transferred. In addition to nuclear DNA, some DNA is present in energy-producing mitochondria, small organelles found free-floating in the cytoplasm, the area of the cell outside the nucleus.
0コメント