All the following statements about DNA are true, EXCEPT: O DNA is a double-helix, consisting of a sugar-phosphate backbone. O DNA is made up on nucleotides, which consist of one sugar, one phosphate, and one base. O DNA consists of 4 bases - adenine, uracil, cytosine, and guanine. O The two main functions of DNA are to replicate itself and to create proteins (by providing the template for protein synthesis). O The sugar in DNA is deoxyribose.
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- Identify the key structural features of a DNA molecule. Strong ionic bonds and hydrophobic interaction hold DNA together. DNA bases are always paired purine with pyrimidine. DNA strands are antiparallel and include a 5' end and a 3' end. DNA contains the nucleotide bases adenine, thymine, guanine, cytosine, and uracil. DNA is most often found as a left-handed helix, commonly referred to as Z-DNA. The backbone of DNA is made of a sugar and a phosphate molecule.Match each of the following terms with the one definition that best describes it. Any of the following: Uracil, Cytosine, Thymine, Adenine, Guanine ····· Closes "nicks" between DNA fragments, forming a covalent bond that joins the fragments together Lays down a short chain of nucleotides at the beginning of DNA replication Synthesizes mRNA from a DNA template Unwinds the DNA double helix during DNA replication Adds individual nucleotides to a growing DNA strand during DNA replication 1. RNA Polymerase 2. DNA Polymerase 3. Ligase 4. Primase 5. Helicase 6. Nitrogenous BaseDNA has unique properties that allow it to accurately retain genetic information, even after multiple rounds of replication. One aspect of DNA that allows it to accurately store genetic information is the base pairing from Chargaff's first rule of the four nucleotide bases. If the A content of a DNA molecule is 18%, what are the percentages of the remaining bases? T = G = C = % % %
- What statement about DNA polarity is TRUE? One end of the chain has a 5'-OH group attached to a phosphoryl group. The other end of the chain has a free 3'-OH group, which is linked to another nucleotide. One end of the chain has a free 5'-OH group or 5'-OH group attached to a phosphoryl group. The other end of the chain has a free 3'-OH group. None is linked to another nucleotide. One end of the chain has a free 3'-OH group or 3'-OH group attached to a phosphoryl group. The other end of the chain has a free 3'-OH group, which is linked to another nucleotide. One end of the chain has only a free 5'-OH group. The other end of the chain has a free 3'-OH group. Neither is linked to another nucleotide. One end of the chain has a free 5'-OH group. The other end of the chain has a free 3'-OH group.List the DNA bases that will complementary base pair with the following sequence: A-G-C-T-A-C-GThe following are components of DNA, except for: nitrogen-containing base phosphate group deoxyribose sugar all of the above none of above
- The nucleotides are very specific as to which bond together. The four nucleotides are:Adenine (A) Thymine (T)Guanine (G) Cytosine (C)They are written out in this order because Adenine always bonds with Thymine and Cytosine alwaysbonds with Guanine. Draw a line connecting those so you remember.Let’s practice making complementary strands. DNA: T-A-C-T-T-A-C-A-C-G-T-C-A-A-C-G-T-G-C-C-T-T-A-G-C-C-A-T-TDNA: A-T-GGo ahead and write out the complementary strand to the strand above continuing where we left off.Which of the following statements regarding DNA is false? Features a beta glycosidic bond between deoxyribose and nucleobase. Phosphoester bonds in DNA are extremely stable to non-catalytic hydrolysis. In B DNA the parallel stacks of nucleobases are separated by about 3.5 A A DNA is formed from single strands of RNA and DNA DNA contains uridine, adenosine, guanosine, and cytidine as nucleobases.There are four types of nucleotides in DNA molecules. Which of the following is NOT one of the four types of DNA nucleotides? O Adenine O Cytosine O Guanine O Thymine O Valine
- Some Discoveries about DNA DNA is made of deoxyribose sugar, phosphate, and four nucleotides (A, G, C, and T). DNA was originally isolated from white blood cells. X-ray diffraction of the DNA molecules shows that it is a helical structure. Adenine pairs with thymine and guanine pairs with cytosine in any sample of DNA. DNA, not proteins, carries genetic information. Match the following scientists with their discoveries listed above. Discovery: Answer Answer Answer Answer Scientist: Franklin Chargaff Levene Hershey and ChaseWhich of the following describes the DNA molecule? A DNA molecule is single-stranded and is composed of phosphate and two nitrogenous bases (thymine and cytosine) that follow complementary base pairing rules T-C. A DNA molecule is double-stranded and is composed of sugar, phosphate, and four nitrogenous bases (adenine, thymine, cytosine, guanine) that follow complementary base pairing rules A-T and C-G. A DNA molecule is single-stranded and is composed of sugar and four nitrogenous bases (adenine, thymine, cytosine, guanine) that follow complementary base pairing rules A-G and C-T. A DNA molecule is double-stranded and is composed of sugar and two nitrogenous bases (adenine, and guanine) that follow complementary base pairing rules A-G.Which of the following base-pairing rule is correct : * Adenine with guanine and thymine with cytosine DNA base pairing is non-specific Adenine with cytosine and guanine with thymine Adenine with thymine and guanine with cytosine