The B form (most common) of DNA forms a right-handed helix. Which of the below molecules contains a right-handed helix? Explain your answer.
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The B form (most common) of DNA forms a right-handed helix.
Which of the below molecules...
Question 4.(60 secs Which of the following pair is mismatched? A. B-DNA: dehydrated B.Z-DNA:left-handed helix C.A-DNA:...
Question 4.(60 secs Which of the following pair is mismatched? A. B-DNA: dehydrated B.Z-DNA:left-handed helix C.A-DNA: dehydrated D.Z-DNA: no major grooves E.B-DNA: right-handed helix
Select the phrases that accurately describe properties of the most common form of the DNA double helix
Select the phrases that accurately describe properties of the most common form of the DNA double helix. There is more than one correct answer. Select all that apply. DNA contains equal amounts of adenine and thymine, and equal amounts of cytosine and guanine. A helical turn consists of about 10 nucleotides. Base pairs have a spacing of 20 A. The phosphodiester bonds between nucleotide residues run in opposite directions in the two strands. The nitrogenous bases are exposed to the solvent, whereas the sugar-phosphate backbone of...
Question 1 Which of the following is a possible DNA structure, in addition to the right-handed...
Question 1 Which of the following is a possible DNA structure, in addition to the right-handed double helix? a triple helices b left-handed helices branched chains d. Straight chains None of the above
Which of the following statements concerning the various forms of DNA is incorrect? a. B-DNA is...
Which of the following statements concerning the various forms of DNA is incorrect? a. B-DNA is the conformation observed under physiological conditions. b. A-DNA occurs in a partially dehydrated environment. c. A-DNA and Z-DNA are right handed helices, while B-DNA is left handed d. Z-DNA is formed by alternating C-G nucleotides.
How many hydrogen bonds exist between this DNA strand and its complementary strand? 5'-AGGCCTT-3 Number As...
How many hydrogen bonds exist between this DNA strand and its complementary strand? 5'-AGGCCTT-3 Number As a result of rotation about six of its bonds, DNA can exist in a variety of forms. Determine whether each of the following images and properties describes the A form, B form, or Z form of DNA. A form B form Z form All antiparallel strands left-handed C-3' of deoxyribose 18.4 A is out of the plane of helix diameter the other ring atoms...
The structures of an A-form and a B-form double helix are different in several respects. Use...
The structures of an A-form and a B-form double helix are different in several respects. Use a drawing to describe how is the position of the base pair within the helix related to the size of the minor groove and major groove. Which of the two forms is favored by RNA, and which is favored by DNA? In which are the base pairs perpendicular to the axis of the helix, and in which are they tilted? Which of the two...
WORKSHEET 6: ACIDS AND BASES 2. Guanine is one of the four nucleobases that form the backbone of the DNA double helix:...
WORKSHEET 6: ACIDS AND BASES 2. Guanine is one of the four nucleobases that form the backbone of the DNA double helix: NH NH 2 Identify each lone pair in this molecule as localized or delocalized a. b. Using your answer from part a, identify which nitrogen atoms you expect to be most basic
WORKSHEET 6: ACIDS AND BASES 2. Guanine is one of the four nucleobases that form the backbone of the DNA double helix: NH NH 2 Identify...
a) Which of the two following peptides is most likely to form an amphipathic α-helix? Explain...
a) Which of the two following
peptides is most likely to form an amphipathic α-helix? Explain
your choice. Peptide #1: SANKSEQLKA or Peptide #2: SLANEAQKLR (b)
Which of the two following peptides is most likely to be a β-strand
in an amphipathic β-sheet? Explain your choice. Peptide #3:
KASNELQLKA or Peptide #4: ELSKNLKAQL
1) (6 pts) (a) which of the two following peptides is most likely to form an amphipathic α-helix? Explain your choice. Peptide #1: SANKSEQLKA or Peptide #2:...
5. Which of the following molecules form complex structures linked by covalent bonds through Lys, HyLys,...
5. Which of the following molecules form complex structures linked by covalent bonds through Lys, HyLys, or His residues? A) Collagen B) Alpha keratin C) Hemoglobin D) Myoglobin E) Beta barrels 6. Which of the following correlates to the classic experiment demonstrating that reduced and denatured RNase A could refold into the native form? A) Disulfide bonds do not stabilize folded proteins B) Reducing agents denature proteins C) 1° structure can determine 3° structure D) Urea cleaves disulfide bonds E)...
1. The figure below shows a DNA double helix and its nucleotide sequence. A. A homodimeric...
1. The figure below shows a DNA double helix and its nucleotide
sequence.
A. A homodimeric helix–turn–helix protein binds to a DNA
fragment containing this sequence. Its preferred half-site is
AACAC. Show where the two recognition helices in the protein
contact the DNA.
B. Are protein–DNA contacts primarily in the major or the minor
groove of DNA? What parts of the nucleotides contact the amino acid
side chains of the protein to provide most sequence specificity?
What kind of bond...
Question 4.(60 secs Which of the following pair is mismatched? A. B-DNA: dehydrated B.Z-DNA:left-handed helix C.A-DNA: dehydrated D.Z-DNA: no major grooves E.B-DNA: right-handed helix
Question 1 Which of the following is a possible DNA structure, in addition to the right-handed double helix? a triple helices b left-handed helices branched chains d. Straight chains None of the above
Which of the following statements concerning the various forms of DNA is incorrect? a. B-DNA is the conformation observed under physiological conditions. b. A-DNA occurs in a partially dehydrated environment. c. A-DNA and Z-DNA are right handed helices, while B-DNA is left handed d. Z-DNA is formed by alternating C-G nucleotides.
How many hydrogen bonds exist between this DNA strand and its complementary strand? 5'-AGGCCTT-3 Number As a result of rotation about six of its bonds, DNA can exist in a variety of forms. Determine whether each of the following images and properties describes the A form, B form, or Z form of DNA. A form B form Z form All antiparallel strands left-handed C-3' of deoxyribose 18.4 A is out of the plane of helix diameter the other ring atoms...
WORKSHEET 6: ACIDS AND BASES 2. Guanine is one of the four nucleobases that form the backbone of the DNA double helix: NH NH 2 Identify each lone pair in this molecule as localized or delocalized a. b. Using your answer from part a, identify which nitrogen atoms you expect to be most basic
WORKSHEET 6: ACIDS AND BASES 2. Guanine is one of the four nucleobases that form the backbone of the DNA double helix: NH NH 2 Identify...
a) Which of the two following
peptides is most likely to form an amphipathic α-helix? Explain
your choice. Peptide #1: SANKSEQLKA or Peptide #2: SLANEAQKLR (b)
Which of the two following peptides is most likely to be a β-strand
in an amphipathic β-sheet? Explain your choice. Peptide #3:
KASNELQLKA or Peptide #4: ELSKNLKAQL
1) (6 pts) (a) which of the two following peptides is most likely to form an amphipathic α-helix? Explain your choice. Peptide #1: SANKSEQLKA or Peptide #2:...
5. Which of the following molecules form complex structures linked by covalent bonds through Lys, HyLys, or His residues? A) Collagen B) Alpha keratin C) Hemoglobin D) Myoglobin E) Beta barrels 6. Which of the following correlates to the classic experiment demonstrating that reduced and denatured RNase A could refold into the native form? A) Disulfide bonds do not stabilize folded proteins B) Reducing agents denature proteins C) 1° structure can determine 3° structure D) Urea cleaves disulfide bonds E)...
1. The figure below shows a DNA double helix and its nucleotide
sequence.
A. A homodimeric helix–turn–helix protein binds to a DNA
fragment containing this sequence. Its preferred half-site is
AACAC. Show where the two recognition helices in the protein
contact the DNA.
B. Are protein–DNA contacts primarily in the major or the minor
groove of DNA? What parts of the nucleotides contact the amino acid
side chains of the protein to provide most sequence specificity?
What kind of bond...
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