Concept explainers
(a)
To determine: If Chargaff’s rule implied that equal amounts of guanine and adenine are present in DNA.
Interpretation: Whether Chargaff’s rule implied that the equal amounts of guanine and adenine are present in DNA is to be stated.
Concept introduction: James and Watson in
According to Chargaff’s rule the DNA contains the equimolar amounts of guanine and cytosine and also equimolar amounts of adenine and thymine.
This means that
The pyrimidine bases are cytosine and thymine and purine bases are guanine and adenine that are present in DNA.
(b)
To determine: If Chargaff’s rule implied that the sum of purine residues equals the sum of pyrimidine residues.
Interpretation: Whether Chargaff’s rule implied that the sum of purine residues equals the sum of pyrimidine residues is to be stated.
Concept introduction: James and Watson in
According to Chargaff’s rule the DNA contains the equimolar amounts of guanine and cytosine and also equimolar amounts of adenine and thymine.
This means that
The pyrimidine bases are cytosine and thymine and purine bases are guanine and adenine that are present in DNA.
(c)
To determine: If Chargaff’s rule applied only to double-stranded DNA or it would also apply to individual strand if the double helical strand were separated into its two complementary strands.
Interpretation: Whether Chargaff’s rule applied only to double-stranded DNA or it would also apply to individual strand if the double helical strand were separated into its two complementary strands is to be stated.
Concept introduction: James and Watson in
According to Chargaff’s rule, the DNA contains the equimolar amounts of guanine and cytosine and also equimolar amounts of adenine and thymine.
This means that
The pyrimidine bases are cytosine and thymine and purine bases are guanine and adenine that are present in DNA.
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Chapter 23 Solutions
Organic Chemistry Plus Masteringchemistry With Pearson Etext, Global Edition
- Don't used hand raiting don't used Ai solutionarrow_forwardHomework: Atomic Structure This homework is due at the beginning of class next lecture period and is worth 6 points. Please place the number of protons and neutrons in the nucleus and then put the number of electrons in the correct shell. Also give the correct atomic mass. Also, state if the atom is an ion (cation or anion). H* 1. Number of protons Number of electrons Number of neutrons Atomic mass 2. 26 13AI +++ Number of protons Number of neutrons Number of electrons Atomic massarrow_forwardDon't used hand raitingarrow_forward
- I need help working this problem out step by step, I was trying to use my example from the txt book but all I know how to do is set it up. I need to be shown step by step as I am a visual learner. Please help me.arrow_forwardDon't used hand raitingarrow_forwardDon't used Ai solution and don't used hand raitingarrow_forward
- & Calculate the molar enthalpy of combustion (A combH) of 1.80 g of pyruvic acid (CH3COCOOH; 88.1 g mol-1) at 37 °C when they are combusted in a calorimeter at constant volume with a calorimeter constant = 1.62 kJ °C-1 and the temperature rose by 1.55 °C. Given: R = 8.314 J mol −1 °C-1 and the combustion reaction: AN C3H4O3 + 2.502(g) → 3CO2(g) + 2H2O(l)arrow_forwardAn unknown salt, AB, has the following precipitation reaction:A+(aq) + B-(aq) ⇌ AB(s) the K value for this reaction is 4.50 x10-6. Draw a model that represents what will happen when 1.00 L each of 1.00 M solution of A+(aq) and 1.00M solution of B-(aq) are combined.arrow_forward5. a) Use the rules in Example 4.4 (p. 99) and calculate sizes of octahedral and tetrahedral cavities in titanium and in zirconium. Use values for atomic radii given in Fig. 9.1 (p.291). (3 points) b) Consider the formation of carbides (MC) of these metals. Which metal is able to accommodate carbon atoms better, and which cavities (octahedral or tetrahedral) would be better suited to accommodate C atoms into metal's lattice? (4 points)arrow_forward
- 2. Read paragraph 3.4 in your textbook ("Chiral Molecules"), and explain if Cobalt(ethylenediamine) 33+ shown in previous problem is a chiral species. If yes, draw projections of both enantiomers as mirror images, analogous to mirror projections of hands (below). Mirror (4 points)arrow_forward3. Borane (BH3) belongs to D3h point group. Consider the vibrational (stretching) modes possible for B-H bonds under D3h symmetry. Using the methods we used in class, construct the reducible representation I, and break it down into irreducible representations using the character table provided. Sketch those modes, indicate whether they are IR-active. (6 points) D3h E 2C3 3C2 σh 283 30% A₁' 1 1 1 1 1 1 x² + y², z² 1 -1 1 1 -1 R₂ E' 2 0 2 0 (x, y) (x² - y², xy) " A₁" 1 1 -1 A2" 1 -1 -1 1 Z E" 2 -1 0 -2 1 0 (Ry, Ry) (xz, yz)arrow_forward1. List all the symmetry elements, and assign the compounds to proper point groups: a) HCIBrC-BrCIH Cl Br H (2 points) H Br b) Pentacarbonylmanganese(I)bromide Br OEC-Mn-CEO 00- c) Phenazine (aromatic molecule, with delocalized bonding) 1 d) Cobalt(ethylenediamine)33+ (just the cation) 3+ H₂N H₂ .NH2 (CI)3 NH2 H2 H₂N. (2 points) (2 points) (2 points)arrow_forward
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