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Ch. 2 The Chemistry of Life

Chapter 2, Problem 2.19a

Mark the following properties as belonging to either DNA or RNA.


a. Contains the nucleotides A, G, C, and U ____          

b. Found only in the nucleus of the cell   ____       

c. Can move in and out of the cell's nucleus ____         

d. Contains two strands of nucleotides linked by hydrogen bonds____          

e. Contains the code for every protein in the body____          

f. Contains the sugar ribose____          

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Hey, everyone. Let's take a look at this question together which of the following statements about DNA is true is it answer choice A? It is generally less stable than R and A answer choice B, it contains five nitrogenous bases including Uracil. Answer choice C. It follows complementary base pairing or answer choice D it carries out protein synthesis. Let's work this problem out together to try to figure out which of the following answer choices contains a true statement about DNA. So in order to solve this question, we have to recall what we have learned about DNA to determine if the following answer choice is a true statement starting off with answer choice A which says it is generally less stable than RN A. While we know that the stability of DNA when compared to RN A is not less stable and instead DNA is more stable than RN A. Since RN A has a hydroxyl group on the two carbon of the penthos ring making it less stable than DNA. So answer choice A is incorrect. So answer choice A is a false statement and is incorrect. Next, we have answer choice B which says that DNA contains five nitrogenous spaces including Ell, which we know is also a false statement since DNA does not contain five nitrogenous spaces and instead contains or nitrogenous spaces and does not include uracil since uracil is only found in RN A. So answer choice B is a false statement and it's incorrect. Next, we have answer choice C which says that DNA follows complementary base pairing. Well, we know that answer choice C is a true statement since DNA does follow complementary base pairing in which Adenine pairs with thymine and cytosine pairs with guanine and the complementary base pairing of DNA is crucial for the faithful replication of DNA. So answer choice C is the correct answer since it is a true statement about DNA. And lastly, we know that answer choice D is a false statement and is incorrect since DNA does not carry out protein synthesis and instead protein synthesis is carried out by RN A specifically MRN A. So it is incorrect. And answer choice C is the only answer choice here with a statement about DNA. That is true. I hope you found this video to be helpful. Thank you and goodbye.