General, Organic, and Biological Chemistry
7th Edition
ISBN: 9781285853918
Author: H. Stephen Stoker
Publisher: Cengage Learning
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Chapter 20, Problem 20.138EP
Where are the carbohydrate units located in collagen?
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Don't used hand raiting
The following 'H NMR spectrum was taken with a 750 MHz spectrometer:
1.0
0.5
0.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0 ' 2.0
1.0
0.0
(ppm)
What is the difference Av
in the frequency of RF
ac
Δν
ac
radiation absorbed by the a and c protons? (Note:
it's not equal to the difference in chemical shifts.)
Round your answer to 2 significant digits, and be
sure it has an appropriate unit symbol.
=
O
O a will shift left, c will shift right.
O a will shift right, c will shift left.
a and c will both shift left, with more space
between them.
Suppose a new spectrum is taken with a 500 MHz
spectrometer. What will be true about this new
spectrum?
O
a and c will both shift left, with less space
between them.
O
a and c will both shift right, with more space
between them.
O
a and c will both shift right, with less space
between them.
Which protons have the largest energy gap
between spin up and spin down states?
O None of the above.
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Explanation
Check
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What mass of Na2CO3 must you add to 125g of water to prepare 0.200 m Na2CO3? Calculate mole fraction of Na2CO3, mass percent, and molarity of the resulting solution. MM (g/mol): Na2CO3 105.99; water 18.02. Final solution density is 1.04 g/mL.
Chapter 20 Solutions
General, Organic, and Biological Chemistry
Ch. 20.1 - Prob. 1QQCh. 20.1 - Proteins are naturally occurring unbranched...Ch. 20.2 - Prob. 1QQCh. 20.2 - How do the various standard amino acids differ...Ch. 20.2 - The number of carboxyl groups and amino groups...Ch. 20.2 - How many different subclassifications are there...Ch. 20.2 - Which of the following statements concerning...Ch. 20.3 - Prob. 1QQCh. 20.3 - Proteins from plant sources are a. always complete...Ch. 20.3 - Prob. 3QQ
Ch. 20.4 - Prob. 1QQCh. 20.4 - Which of the following groups is positioned at the...Ch. 20.4 - Which of the following statements concerning...Ch. 20.5 - Which of the standard amino acids exist as...Ch. 20.5 - Which of the following is the zwitterion ion...Ch. 20.5 - Which of the following is the structural form for...Ch. 20.6 - Prob. 1QQCh. 20.6 - Prob. 2QQCh. 20.7 - The joining together of two amino acids to form a...Ch. 20.7 - The number of peptide bonds present in a...Ch. 20.7 - Which of the following statements concerning the...Ch. 20.7 - Prob. 4QQCh. 20.7 - How many isomeric tripeptides can be formed from...Ch. 20.8 - The two best-known peptide hormones present in the...Ch. 20.8 - Which of the following peptides is an important...Ch. 20.9 - The term protein is generally reserved for...Ch. 20.9 - Prob. 2QQCh. 20.9 - Which of the following is not a distinguishing...Ch. 20.10 - Specifying the primary structure of a protein...Ch. 20.10 - Prob. 2QQCh. 20.10 - Prob. 3QQCh. 20.11 - Prob. 1QQCh. 20.11 - Prob. 2QQCh. 20.11 - Prob. 3QQCh. 20.12 - Prob. 1QQCh. 20.12 - Hydrophobic interactions associated with protein...Ch. 20.12 - R group interactions between which of the...Ch. 20.13 - Prob. 1QQCh. 20.13 - Which of the following types of interactions does...Ch. 20.14 - The complete hydrolysis of a protein produces a...Ch. 20.14 - Which of the following statements concerning...Ch. 20.15 - Which of the following levels of protein structure...Ch. 20.15 - Which of the following does not involve protein...Ch. 20.15 - Prob. 3QQCh. 20.16 - Prob. 1QQCh. 20.16 - Prob. 2QQCh. 20.16 - Prob. 3QQCh. 20.16 - In which of the following pairs of proteins are...Ch. 20.17 - Insulin and human growth hormone are examples of...Ch. 20.17 - Myoglobin and transferrin are examples of a....Ch. 20.17 - Prob. 3QQCh. 20.18 - Prob. 1QQCh. 20.18 - Prob. 2QQCh. 20.18 - Prob. 3QQCh. 20.19 - Prob. 1QQCh. 20.19 - Which of the following types of plasma...Ch. 20.19 - Prob. 3QQCh. 20 - Prob. 20.1EPCh. 20 - What element is always present in proteins that is...Ch. 20 - What percent of a cells overall mass is accounted...Ch. 20 - Approximately how many different proteins are...Ch. 20 - What is signified when an amino acid is designated...Ch. 20 - What functional groups are present in all -amino...Ch. 20 - Indicate whether or not each of the following...Ch. 20 - Indicate whether or not each of the following...Ch. 20 - How many carbon atoms are present in the R group...Ch. 20 - How many carbon atoms are present in the R group...Ch. 20 - With the help of Table 20-1, determine the name...Ch. 20 - With the help of Table 20-1, determine the name...Ch. 20 - With the help of Table 20-1, classify each of the...Ch. 20 - With the help of Table 20-1, classify each of the...Ch. 20 - Prob. 20.15EPCh. 20 - With the help of Table 20-1, classify each of the...Ch. 20 - Prob. 20.17EPCh. 20 - Prob. 20.18EPCh. 20 - Prob. 20.19EPCh. 20 - Prob. 20.20EPCh. 20 - Prob. 20.21EPCh. 20 - How many amino groups and how many carboxyl groups...Ch. 20 - Prob. 20.23EPCh. 20 - Which two of the standard amino acids are...Ch. 20 - Prob. 20.25EPCh. 20 - Prob. 20.26EPCh. 20 - Prob. 20.27EPCh. 20 - Prob. 20.28EPCh. 20 - Prob. 20.29EPCh. 20 - Prob. 20.30EPCh. 20 - Indicate whether or not the designation...Ch. 20 - Indicate whether or not the designation...Ch. 20 - Prob. 20.33EPCh. 20 - Prob. 20.34EPCh. 20 - To which family of mirror-image isomers do nearly...Ch. 20 - In what way is the structure of glycine different...Ch. 20 - Draw Fischer projection formulas for the following...Ch. 20 - Draw Fischer projection formulas for the following...Ch. 20 - Answer the following questions about the amino...Ch. 20 - Answer the following questions about the amino...Ch. 20 - At room temperature, amino acids are solids with...Ch. 20 - At room temperature, most amino acids are not very...Ch. 20 - Prob. 20.43EPCh. 20 - Draw the zwitterion structure for each of the...Ch. 20 - Draw the structure of serine at each of the...Ch. 20 - Prob. 20.46EPCh. 20 - Prob. 20.47EPCh. 20 - Most amino acids have isoelectric points between...Ch. 20 - Glutamic acid exists in two low-pH forms instead...Ch. 20 - Arginine exists in two high-pH forms instead of...Ch. 20 - In a low-pH aqueous solution, indicate whether...Ch. 20 - Prob. 20.52EPCh. 20 - When two cysteine molecules dimerize, what happens...Ch. 20 - What chemical reaction involving the cysteine...Ch. 20 - What two functional groups are involved in the...Ch. 20 - Write a generalized structural representation for...Ch. 20 - For the tripeptide GlyAlaCys a. What amino acid is...Ch. 20 - For the tripeptide SerValMet a. What amino acid is...Ch. 20 - Prob. 20.59EPCh. 20 - Prob. 20.60EPCh. 20 - Draw a complete condensed structural...Ch. 20 - Draw a complete condensed structural...Ch. 20 - With the help of Table 20-1, identify the amino...Ch. 20 - With the help of Table 20-1, identify the amino...Ch. 20 - With the help of Table 20-1, assign an IUPAC name...Ch. 20 - With the help of Table 20-1, assign an IUPAC name...Ch. 20 - Prob. 20.67EPCh. 20 - Prob. 20.68EPCh. 20 - For the tripeptide AlaValGly which amino acid...Ch. 20 - For the tripeptide SerArgIle which amino acid...Ch. 20 - Consider the tripeptide tyrosylleucylisoleucine....Ch. 20 - Consider the tripeptide leucylvalyltryptophan. a....Ch. 20 - Explain why the notations SerCys and CysSer...Ch. 20 - Explain why the notations AlaGlyValAla and...Ch. 20 - Prob. 20.75EPCh. 20 - There are a total of six different amino acid...Ch. 20 - Compare the structures of the protein hormones...Ch. 20 - Compare the protein hormones oxytocin and...Ch. 20 - Compare the binding-site locations in the brain...Ch. 20 - Compare the structures of the peptide...Ch. 20 - Prob. 20.81EPCh. 20 - Prob. 20.82EPCh. 20 - What is the major difference between a monomeric...Ch. 20 - What is the major difference between a simple...Ch. 20 - Prob. 20.85EPCh. 20 - Prob. 20.86EPCh. 20 - Prob. 20.87EPCh. 20 - Two proteins with the same amino acid composition...Ch. 20 - How many different primary structures are possible...Ch. 20 - How many different primary structures are possible...Ch. 20 - How many different primary structures are possible...Ch. 20 - How many different primary structures are possible...Ch. 20 - Prob. 20.93EPCh. 20 - Draw a segment of the backbone of a protein that...Ch. 20 - Prob. 20.95EPCh. 20 - In a pleated sheet secondary structure for a...Ch. 20 - Indicate whether each of the following statements...Ch. 20 - Indicate whether each of the following statements...Ch. 20 - Prob. 20.99EPCh. 20 - Prob. 20.100EPCh. 20 - State the four types of attractive forces that...Ch. 20 - Prob. 20.102EPCh. 20 - Prob. 20.103EPCh. 20 - Prob. 20.104EPCh. 20 - Prob. 20.105EPCh. 20 - Prob. 20.106EPCh. 20 - Prob. 20.107EPCh. 20 - Prob. 20.108EPCh. 20 - Prob. 20.109EPCh. 20 - Not all proteins have quaternary structure....Ch. 20 - Prob. 20.111EPCh. 20 - Prob. 20.112EPCh. 20 - Prob. 20.113EPCh. 20 - Prob. 20.114EPCh. 20 - Prob. 20.115EPCh. 20 - Prob. 20.116EPCh. 20 - Prob. 20.117EPCh. 20 - Prob. 20.118EPCh. 20 - Identify the primary structure of a hexapeptide...Ch. 20 - Identify the primary structure of a hexapeptide...Ch. 20 - Draw structural formulas for the products obtained...Ch. 20 - Prob. 20.122EPCh. 20 - Which structural levels of a protein are affected...Ch. 20 - Prob. 20.124EPCh. 20 - In what way is the protein in a cooked egg the...Ch. 20 - Why is cooked protein more easily digested than...Ch. 20 - Indicate whether or not each of the following...Ch. 20 - Prob. 20.128EPCh. 20 - Prob. 20.129EPCh. 20 - Contrast fibrous and globular proteins in terms of...Ch. 20 - Classify each of the following proteins as a...Ch. 20 - What is the major biochemical function of each of...Ch. 20 - Prob. 20.133EPCh. 20 - Prob. 20.134EPCh. 20 - Prob. 20.135EPCh. 20 - Prob. 20.136EPCh. 20 - Prob. 20.137EPCh. 20 - Where are the carbohydrate units located in...Ch. 20 - Prob. 20.139EPCh. 20 - Prob. 20.140EPCh. 20 - Prob. 20.141EPCh. 20 - Prob. 20.142EPCh. 20 - Prob. 20.143EPCh. 20 - Describe the process by which blood...Ch. 20 - Prob. 20.145EPCh. 20 - Prob. 20.146EPCh. 20 - Prob. 20.147EPCh. 20 - Prob. 20.148EPCh. 20 - Prob. 20.149EPCh. 20 - Prob. 20.150EPCh. 20 - Prob. 20.151EPCh. 20 - Prob. 20.152EP
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