Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Question
Chapter 3.1, Problem 4CC
Summary Introduction
To draw:
The structure where, from a cysteine molecule, the NH2 group is replaced with a COOH (carboxyl) group. Also, determine how this change would alter the chemical properties and state whether the central carbon atomis asymmetric after or before the alteration.
Concept introduction:
Amino acids are the molecules that are organic and consist of both the carboxyl and amino groups.
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Suppose you had an organic molecule such as cysteine (see Figure 4.9,sulfhydryl group example), and you chemically removed the --NH2 group and replaced it with --COOH. Draw this structure. How would this change the chemical properties of the molecule? Is the central carbon asymmetric before the change? After?
DRAW IT Suppose you had an organic molecule suchas cysteine (see Figure 4.9, sulfhydryl group example),and you chemically removed the —NH2 group andreplaced it with —COOH. Draw this structure. Howwould this change the chemical properties of themolecule? Is the central carbon asymmetric beforethe change? After?
Which of the following is not an organic molecule: methane (CH4), fructose (C6H12O6), rosane (C20H36), or ammonia (NH3)? How do you know?
Chapter 3 Solutions
Campbell Biology in Focus
Ch. 3.1 - How are gasoline and fat chemically similar?Ch. 3.1 - Which molecules in Figure 3.4a re isomers? For...Ch. 3.1 - Prob. 3CCCh. 3.1 - Prob. 4CCCh. 3.2 - How many molecules of water are needed to...Ch. 3.2 - WHAT IF? Suppose you eat a serving of fish. What...Ch. 3.3 - Write the formula for a monosaccharide that has...Ch. 3.3 - A dehydration reaction joins two glucose molecules...Ch. 3.3 - WHAT IF? After a cow is given antibiotics to treat...Ch. 3.4 - Compare the structure of a fat (triglyceride) with...
Ch. 3.4 - Why are human sex hormones considered lipids?Ch. 3.4 - Prob. 3CCCh. 3.5 - Why does a denatured protein no longer function...Ch. 3.5 - What parts of a polypeptide participate in the...Ch. 3.5 - WHAT IF? Where would you expect a polypeptide...Ch. 3.6 - DRAW IT Go to Figure 3.27a and, for the top three...Ch. 3.6 - Prob. 2CCCh. 3.7 - How would sequencing the entire genome of an...Ch. 3.7 - Given the function of DNA, why would you expect...Ch. 3 - Which functional group is not present in this...Ch. 3 - MAKE CONNECTIONS Which chemical group is most...Ch. 3 - Prob. 3TYUCh. 3 - Which of the following statements concerning...Ch. 3 - Prob. 5TYUCh. 3 - The structural level of a protein least a fleeted...Ch. 3 - Enzymes that break down DNA catalyze the...Ch. 3 - Prob. 8TYUCh. 3 - The molecular formula for glucose is C6H12O6. What...Ch. 3 - Construct a table that organizes the following...Ch. 3 - Prob. 11TYUCh. 3 - Prob. 12TYUCh. 3 - FOCUS ON ORGANIZATION Proteins, which have diverse...Ch. 3 - Prob. 14TYUCh. 3 - SYNTHESIZE YOUR KNOWLEDGE Given that the function...
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- What are hydrocarbons? Are they prevalent in living organisms? What type of molecule found commonly in living things has a major hydrocarbon component? Are hydrocarbons hydrophobic or hydrophilic? Relate the hydrophobicity/hydrophilicity of hydrocarbons to their structure.arrow_forwardOrganic compounds are present in all living cells. They allshare the following characteristic:(a) Are used in protein synthesis(b) Are biological catalysts(c) Are composed of carbon atom backbone surrounded bychloride atoms(d) Are hydrophobic(e) Are composed of carbon atom backbone surrounded byhydrogen atomsarrow_forwardDraw a “dot & cross” diagram to show the shape of a water molecule (H2O). Bond angles need to be shown. State the shape of a water molecule.arrow_forward
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- Figure 2.24 Which of the following statements is false? Molecules with the formulas CH3CH2COOH and C3H6O2 could be structural isomers. Molecules must have a double bond to be cis-trans isomers. To be enantiomers, a molecule must have at least three different atoms or groups connected to a central carbon. To be enantiomers, a molecule must have at least four different atoms or groups connected to a central carbon.arrow_forwardPREDICT Do any of the amino acid side groups shown below have the potential to form an ionic bond with any of the other side groups shown? If so, which pair(s) could form such an association? (a)CH3 (b)CH2 COO (c)CH2 CH2 NH3+ (d)CH2 CH2 COO (e)CH2 OHarrow_forwardDraw a water molecule and a methanol molecule interacting with each other. Label: one polar covalent bond, one nonpolar covalent bond, and one hydrogen bond. Indicate all atoms which have a partial positive or negative charge with the appropriate symbol.arrow_forward
- in dehydration reaction between phosphate (derived from phosphoric acid) and glycerol (a sugar alcohol) accompanied with the removal of a water molecule, what chemical bond holds them together in a phospholipid molecule? A. Ether Alcohol B. Thioester Bond C. Acid Anhydride/Phosphoanydride bond D. Ester Bondarrow_forwardWhich of the following statements is NOT true of biological organic molecules? None of the other four answers (all are true) They’re usually polymers formed from subunits (monomers) Their atoms are mostly or entirely covalently bonded Monomers are linked (bonded) together by hydrolysis (“water splitting”) Always contain hydrogen and carbonarrow_forwardHow would the properties of the various classes of biological molecules be altered if you were to replace all the oxygen atoms with sulfur atoms?arrow_forward
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