EBK CAMPBELL BIOLOGY
10th Edition
ISBN: 9780136539414
Author: Reece
Publisher: VST
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Textbook Question
Chapter 4, Problem 4.3CR
In what ways does a methyl group differ chemically from the other six important chemical groups shown in Figure 4.9?
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What are the structural differences between (a) purines and pyrimidines, and (b) ribose and deoxyribose sugars?
How many charged functional groups will be found on serine at physiological pH?
Consider the following tetrapeptide, written in a sequence according to normal
convention, from left to right:
Residue 1 is acidic; Residue 2 is proline (a large hydrophobic amino acid); Residue 3 is
cysteine (an amino acid containing a -CH2SH R-group); Residue 4 is basic.
Which of the following four general statements is TRUE regarding this tetrapeptide?
This tetrapeptide probably is not part of an alpha-helix, since the large size of the proline would disrupt the
consistency of the spiral shape.
Residue 3 belongs to the amino acid category known as "basic."
This tetrapeptide has the ability to form a disulfide linkage with an identical tetrapeptide.
The acidic residue (Residue #1) is at the amino terminus of this tetrapeptide.
3 of these 4 responses are correct
Chapter 4 Solutions
EBK CAMPBELL BIOLOGY
Ch. 4.1 - Why was Whler astonished to find he had made urea?Ch. 4.1 - VISUAL SKILLS See Figure 4.2. Miller carried out...Ch. 4.2 - DRAW IT (a) Draw a structural formula for C2H4....Ch. 4.2 - Prob. 2CCCh. 4.2 - How are gasoline and fat chemically similar?Ch. 4.2 - VISUAL SKILLS See Figures 4.5a and 4.7. Can...Ch. 4.3 - VISUAL SKILLS What does the term amino acid...Ch. 4.3 - What chemical change occurs to ATP when it reacts...Ch. 4.3 - DRAW IT Suggose you had an organic molecule such...Ch. 4 - How did Stanley Miller's experiments support the...
Ch. 4 - Prob. 4.2CRCh. 4 - In what ways does a methyl group differ chemically...Ch. 4 - Organic chemistry is currently defined as (A) the...Ch. 4 - Prob. 2TYUCh. 4 - MAKE CONNECTIONS Which chemical group is most...Ch. 4 - VISUAL SKILLS Visualize the structural formula of...Ch. 4 - visual skills Choose the term that correctly...Ch. 4 - VISUAL SKILLS Identify the asymmetric carbon in...Ch. 4 - Which action could produce a carbonyl group? (A)...Ch. 4 - Prob. 8TYUCh. 4 - Prob. 9TYUCh. 4 - SCIENTIFIC INQUIRY 50 years ago, pregnant women...Ch. 4 - WRITE ABOUT A THEME: ORGANIZATION In 1918, an...Ch. 4 - SYNTHESIZE YOUR KNOWLEDGE Explain how the chemical...
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- Why are the most commonly observed conformations of the ribose ring those in which either atom C2′ or atom C3′ is out of the plane of the other four ring atoms?arrow_forwardWhich amino acid is technically not an amino acid? Whichamino acid contains no chiral carbon atoms?arrow_forwardConsider the following tetrapeptide, written in a sequence according to normal convention, from left to right: Residue 1 is acidic; Residue 2 is cysteine (an amino acid containing a CH2SH R-group); Residue 3 is proline (a large hydrophobic amino acid); Residue 4 is basic. Which of the following four general statements is TRUE regarding this tetrapeptide? Residue 2 belongs to the amino acid category known as "basic." 3 of these 4 responses are correct O This tetrapeptide does not have the ability to form a disulfide linkage with an identical tetrapeptide. The acidic residue (Residue #1) is at the amino terminus of this tetrapeptide. This tetrapeptide could be part of an alpha-helix, since the large size of the proline would not have any impact on the consistency of the spiral shape.arrow_forward
- Prostaglandins are a naturally occurring class of compounds in our bodies that affect blood pressure, and cause inflammation and other physiological responses. The synthesis of prostaglandins in our bodies starts with arachidonic acid (see figure below), a long, unsaturated hydrocarbon containing four C=C double bonds and an acid functional group (–COOH). The stereoisomer with all cis double bonds is shown. Draw the stereoisomer with all trans double bonds. Draw the Lewis structures with the formal charges minimized. Do not include formal charges or electron pairs. You do not need to draw hydrogen atoms that are connected to carbon atoms.arrow_forwardConsider the structure of the tripeptide (in its fully protonated form) below. H H H + I || H₂N-C-C-N-C-C-N-C-C-OH 1 I | H CH₂ H CH₂ CH₂ T C=O OH AA1 0=0 || HC-CH3 CH3 AA2 AA3 0=C 1. Give the sequence of the tripeptide using the ONE-LETTER DESIGNATION (UPPERCASE LETTER) with NO spaces and symbols between each letter. 2. How many ionizable groups are there in the tripeptide? Give the numerical value (e.g., 10 not ten). • pH 10: {Choices: -2, -1, 0, +1, +2} 3. Which amino acid residue has one ionizable group left upon forming the tripeptide? {Choices: AA1, AA2, AA3, none, all} 4. Give the net charge of the dominant structure of the tripeptide at the given pH values. The pK, values of the amino acids are given in Table 1. • pH 4: {Choices: -2, -1, 0, +1, +2}arrow_forwardName the heterocyclic substituent found in the molecule shown according to the general type of nitrogen-containing ring to which it belongs.arrow_forward
- For each of the following, name an amino acid in which the R group contains it: a hydroxyl group, a sulfur atom, a second chiral carbon atom, an amino group, an amide group, an acid group, an aromatic ring, and a branched side chain.arrow_forwardWith the following amino acid side chain can the side chain of threonine form hydrogen bonds? Q.) Phenylalaninearrow_forwardHow many different tripeptides can be formed from three different amino acids, glutamine, histidine, and lysine? Draw the possible structures. Using three-letter abbreviations, give the names for all of the possible tripeptides.arrow_forward
- Consult Table 18.3 and draw alanine. Label the functional groups and give the three-letter abbreviation and the one-letter abbreviation. What group does the side chain fall into?arrow_forwardWhy is it important to specify the 3-D structure of amino acids?arrow_forwardWhy do think nucleotides are also sometimes referred to as “bases” or “nucleotide bases”? What is the difference between a nucleotide and a nucleoside? Explain by giving an example, using structures. What kind of bond links a base to some sugar? Is the sugar an alpha or beta anomer? In what position(s) of the sugar does this occur? In what position(s) of the base does this occur? Instead of the term “Formation of a nucleoside”, what could the name of the reaction be? What functional group is being formed? Define the primary structure of DNA/RNA. Compare and contrast to the primary structure of proteins.arrow_forward
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