Homework Answers
Ans A8 : b) aldehydes and ketones with two or more hydroxyl groups
The carbohydrates or sugars as commonly called are the compounds that have aldehydes or ketone functional groups in them. These compounds have hydroxyl groups on them as well. They provide sweetness to food items and provide calories to the body.
Some of the examples of carbohydrates are : glucose , fructose , sucrose etc.
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A8. Which of the following describes carbohydrates? (a) a base, a sugar, and a phosphate b)...
The one-letter sequence is: WATER a) Draw the peptide (R-groups trans), indicating charges, in pr...
The one-letter sequence is: WATER
a) Draw the peptide (R-groups trans), indicating charges, in
predominant form found at pH = 0.
b) What is the isoelectric point?
c) What is the average charge on the population of peptide
macromolecules at pH = 2.2?
d) What is the average charge on the population of peptide
macromolecules at pH = 12.5?
TABLE 4.1 Amino Acid Alanine Arginine Asparagine Aspartic acid Cysteine....« Glutamic acid Glutamine Glycine Histidine Isoleucine Leucine Lysine … Methionine Phenylalanine...
12. Which of the following best describes the components of phospholipids? A) Glycerol, one fatty acid,...
12. Which of the following best describes the components of phospholipids? A) Glycerol, one fatty acid, two phosphate groups and an aminoalcohol B) Glycerol, two fatty acids, one phosphate group, and an aminoalcohol C) Sphingosine, two fatty acid, one phosphate group and an aminoalcohol D) Glycerol, three fatty acids, and a phosphate group 13. When ribose adopts the most stable cyclic structure hemiacetal, which of the following is happening? A. it becomes a furonose C. an acetal is formed B....
#202 Dipeptides Which amino acids, in order left to right, are present in the following structure? HN OH Select one: O...
#202 Dipeptides Which amino acids, in order left to right, are present in the following structure? HN OH Select one: O a. tyrosine, serine O b. tyrosine, threonine c. phenylalanine, threonine d. phenylalanine, valine e. phenylalanine, isoleucine O
1. Which of the following statements describes lipids? A) Lipids all have the steroid backbone. B)...
1. Which of the following statements describes lipids? A) Lipids all have the steroid backbone. B) The body stores excess calories as lipids. C) Lipids are insoluble in water, but soluble in nonpolar solvents. D) Lipids are soluble in water, but insoluble in nonpolar solvents. E) Lipids are insoluble in all solvents 2. Which of the following type of molecule is not a lipid? A) amino acid B) triglyceride C) phospholipid D) steroid E) eicosanoid 3. Which type of lipid...
Which of the following is trus? A) During saponification of triglycerides smide bends me lydrolyzed using...
Which of the following is trus? A) During saponification of triglycerides smide bends me lydrolyzed using Koll or Not B) Hydrolysis of sphingolipids yields two free amino groups and two fatty acids C) A wax is an ester with two very long hydrocarbon chains D) Active transport of molecules across membranes requires an energy input E) C and D are both correct answers 35. The following perspective formula represents? (Hydrogen atoms bonded to carbs are not shown) CH OH O,...
35) Sugars contain which atoms:
35) Sugars contain which atoms: a) CHON b) CANT c) CHO d) NOT c) NOPE 36) Lipids are composed of: a) fatty acids and glycerol b) amino acids and glycerol c) nucleic acids and glycerol d) fatty acids and water e) fatty acids and sugar 37) Lipids are used: a) to form the membrane of the cell b) to make proteins c) to replenish amino acids d) to organize the DNA of the cell e) to form water 38) Fatty acid tails are: a) hydrophilic b) hydrophobic c) amphipathic d) hydropathic e) hydrogen deficient 39) The sugar found in RNA is: a) glucose b) galactose c) ribose d)...
7. The following monosaccharide is classifieds? C100 H- OH HO- но- н CH OH A D-ketopetose...
7. The following monosaccharide is classifieds? C100 H- OH HO- но- н CH OH A D-ketopetose B. D-aldobese Lad y 8. Which molecule contains a chiral carbon? TH HC CHYCH H O C HYCH, HC 9. Carbohydrates are A) aldehydes and esters with multiple hydroxyl groups. B) ketones and aldehydes with multiple hydroxyl groups C) acids and ketones with multiple hydroxyl groups. D) ethers and aldehydes with multiple hydroxyl bonds 10. The cartoon below represents a membrane Observe the arrows,...
Question 10 (10 pts) Peptides are biological oligomers formed by condensing multiple amino acids into an...
Question 10 (10 pts) Peptides are biological oligomers formed by condensing multiple amino acids into an amide backbone. Although this amide backbone is common to all peptides, the so- called 'side-chan' groups attached to this backbone vary depending the amino acids used in the condensation reaction. Shown below are four different tetrapeptides (so-named because they are the products of the condensation of four amino acids). Based on their structures, predict the order of elution that one might expect if separating...
21. Which of the following is not a function of carbohydrates? A) They are catalytic components of enzymes B) They...
21. Which of the following is not a function of carbohydrates? A) They are catalytic components of enzymes B) They play key roles in processes that take place on the surface of cells C) They are major energy sources D) They are used in structural roles Section: 11.1 22. Carbohydrates are A) aldehydes with two or more hydroxyl groups C) acids with two or more hydroxyl groups E) A and B B) ketones with two or more hydroxyl groups D)...
1. Which is a true statement about amino acids? a. They are amphiprotic b. The a-carbon...
1. Which is a true statement about amino acids? a. They are amphiprotic b. The a-carbon has an ester attached c. They are symmetrical d. They are planar e. The α-carbon has a phosphate group attached 2. Which is an incorrect statement regarding the side chains of amino acids? a. Tryptophan, tyrosine, and phenylalanine contain an aromatic group. b. Isoleucine, and leucine are isomers of each other. c. Lysine and methionine contain an amine group. d. Threonine, serine, and tyrosine...
The one-letter sequence is: WATER
a) Draw the peptide (R-groups trans), indicating charges, in
predominant form found at pH = 0.
b) What is the isoelectric point?
c) What is the average charge on the population of peptide
macromolecules at pH = 2.2?
d) What is the average charge on the population of peptide
macromolecules at pH = 12.5?
TABLE 4.1 Amino Acid Alanine Arginine Asparagine Aspartic acid Cysteine....« Glutamic acid Glutamine Glycine Histidine Isoleucine Leucine Lysine … Methionine Phenylalanine...
12. Which of the following best describes the components of phospholipids? A) Glycerol, one fatty acid, two phosphate groups and an aminoalcohol B) Glycerol, two fatty acids, one phosphate group, and an aminoalcohol C) Sphingosine, two fatty acid, one phosphate group and an aminoalcohol D) Glycerol, three fatty acids, and a phosphate group 13. When ribose adopts the most stable cyclic structure hemiacetal, which of the following is happening? A. it becomes a furonose C. an acetal is formed B....
#202 Dipeptides Which amino acids, in order left to right, are present in the following structure? HN OH Select one: O a. tyrosine, serine O b. tyrosine, threonine c. phenylalanine, threonine d. phenylalanine, valine e. phenylalanine, isoleucine O
Which of the following is trus? A) During saponification of triglycerides smide bends me lydrolyzed using Koll or Not B) Hydrolysis of sphingolipids yields two free amino groups and two fatty acids C) A wax is an ester with two very long hydrocarbon chains D) Active transport of molecules across membranes requires an energy input E) C and D are both correct answers 35. The following perspective formula represents? (Hydrogen atoms bonded to carbs are not shown) CH OH O,...
7. The following monosaccharide is classifieds? C100 H- OH HO- но- н CH OH A D-ketopetose B. D-aldobese Lad y 8. Which molecule contains a chiral carbon? TH HC CHYCH H O C HYCH, HC 9. Carbohydrates are A) aldehydes and esters with multiple hydroxyl groups. B) ketones and aldehydes with multiple hydroxyl groups C) acids and ketones with multiple hydroxyl groups. D) ethers and aldehydes with multiple hydroxyl bonds 10. The cartoon below represents a membrane Observe the arrows,...
Question 10 (10 pts) Peptides are biological oligomers formed by condensing multiple amino acids into an amide backbone. Although this amide backbone is common to all peptides, the so- called 'side-chan' groups attached to this backbone vary depending the amino acids used in the condensation reaction. Shown below are four different tetrapeptides (so-named because they are the products of the condensation of four amino acids). Based on their structures, predict the order of elution that one might expect if separating...
21. Which of the following is not a function of carbohydrates? A) They are catalytic components of enzymes B) They play key roles in processes that take place on the surface of cells C) They are major energy sources D) They are used in structural roles Section: 11.1 22. Carbohydrates are A) aldehydes with two or more hydroxyl groups C) acids with two or more hydroxyl groups E) A and B B) ketones with two or more hydroxyl groups D)...
1. Which is a true statement about amino acids? a. They are amphiprotic b. The a-carbon has an ester attached c. They are symmetrical d. They are planar e. The α-carbon has a phosphate group attached 2. Which is an incorrect statement regarding the side chains of amino acids? a. Tryptophan, tyrosine, and phenylalanine contain an aromatic group. b. Isoleucine, and leucine are isomers of each other. c. Lysine and methionine contain an amine group. d. Threonine, serine, and tyrosine...
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