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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EP FUND.OF GENERAL,ORG...-MOD.MASTERING
- 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_forwardTRUE OR FALSE a) The 2 chains composing one double helix run in opposite directions; they are antiparallel (one is 5’->3’ and the other 3’->5’). b) DNA molecules can perform their function in replication and transcription as long as the hydrogen bonds between the bases remain intact.arrow_forward
- What is the nature of the DNA double helix?arrow_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_forwardOne DNA chain of a DNA double helix contains 18% A, 35% T, 28% C, and 21% G. What is the composition of the complementary DNA chain?arrow_forward
- 1) How many bases are found (on one of the strands) in a single twist of a DNA helix: a) 3.4 b) 10 d) 0.34 2)Which of the following is a correct representation of a segment of DNA: a) I b) I and III c) IV and V 3)Consider the following sequence: 5' - AUGGCUACAGAUAGCUGGGGCUGAAAAAAAAAAAAAAA..3'Translated, the corresponding protein contains how many amino acids: a) 6 b) 7 c) 8arrow_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_forwardWhich 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
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning