Concept explainers
Interpretation:
Intermolecular attraction that holds the DNA double helix together has to be interpreted.
Concept Introduction:
Composition of
Nitrogenous bases: Five types of nitrogenous bases (has unique one-letter code A, G, T, U, and C) are derived from two parent compounds called purine and pyrimidine. The purine derivatives are Adenine and Guanine, which are two fused nitrogen containing rings. The pyrimidine derivatives are Thymine, Cytosine, and Uracil, which are nitrogen-containing six-membered ring.
Base pairing in DNA: The two strands of the DNA double helix run in the opposite directions- one in 5’ to 3’ direction and other from 3’ to 5’ direction. The hydrogen bonding between two strands enhances the stability of the DNA; where the alignment of hydrophobic nitrogenous bases in the interior and hydrophilic phosphate and sugar groups on the exterior also enhance the stability. Adenine and thymine gives a pair forming two hydrogen bonds and cytosine and guanine gives rise to another pair forming three hydrogen bonds.
Hydrogen bonding: The electrostatic attraction exists between high electronegative atom and hydrogen atom.
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Fundamentals of General, Organic, and Biological Chemistry (8th Edition)
- Write the sequence of the complementary DNA strand that pairs with each of the following DNA base sequences:(a) TTAGCC(b) AGACATarrow_forwardWhich DNA bases pair with each other? How many hydrogen bonds are shared by each pair?arrow_forwardIf the DNA sequence A-T-T-G-G-C-C-T-A on an informational strand mutated and became A-C-T-G-G-C-C-T-A, what effect would the mutation have on the sequence of the protein produced?arrow_forward
- Plx asaparrow_forwardGiven the following DNA sequence: 5’-ATGCGGCCAAGGTCAGAGTGACA-3’ a) If this DNA strand represents the “Sense Strand” of DNA, what would be the RNA sequence? b) If this DNA strand represents the “Antisense Strand” of DNA, what would be the RNA Sequence? c) What would be the other strand of DNA?arrow_forwardWhat is the best description of how the two strands are aligned with each other in the double helix of DNA? A) parallel B) anti-parallel C) perpendicular D) cross-linked E) obtusearrow_forward
- Which of the following statements regarding polynucleotides is true? a) A double stranded DNA forms a right-handed helix, where both strands run anti-parallel to each other. b) A double stranded DNA forms a left-handed helix, where both strands run anti-parallel to each other. c) A double stranded DNA forms a left-handed helix, where both strands run parallel to each other. d) A double stranded DNA forms a right-handed helix, where both strands run parallel to each other.arrow_forward(a) What will be the problem during DNA replication if the enzyme primase becomes non-functional? (b) In which step of the central dogma is the genetic information of DNA copied into new DNA strands? (c) Which of the following codons is a start codon: GCU, AUG or UGA?arrow_forwardWhy does DNA replication produce two daughter strands that are identical to each other and to the parent DNA?arrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning