Exam 4: Carbon and the Molecular Diversity of Life

Use the figures to answer the question. A. $-\mathrm{OH}$ C. $-\mathrm{NH}_{2}$ B. D. $-\mathrm{SH}$ Which functional group shown can pick up protons and raise the pH of the surrounding solution?

Which two functional groups are always found in amino acids?

A compound contains hydroxyl groups as its predominant functional group. Therefore, this compound ________.

Which chemical group is most likely to be responsible for an organic molecule behaving as a base?

Each bond in carbon dioxide represents ________. $\mathrm{O}=\mathrm{C}=\mathrm{O}$

Use the figures to answer the question. Which molecule shown is a thiol?

Research indicates that ibuprofen, a drug used to relieve inflammation and pain, is a mixture of two enantiomers; that is, molecules that ________.

How many electrons does one atom of carbon share to complete its valence shell?

Use the figures to answer the question. Which molecule has at least one carbon atom attached to three different chemical groups?

Use the figures to answer the question. Which molecule shown above can contribute negative charge when positioned in a chain?

Amino acids are acids because they always possess ________ as the functional group?

In an ethane (C₂H₆) molecule, each carbon atom is bonded to ________ hydrogen atoms.

Choose the term that correctly describes the relationship between these two sugar molecules:

Use the figures to answer the question. A. $-\mathrm{OH}$ C. $-\mathrm{NH}_{2}$ B. D. $-\mathrm{SH}$ Which of the functional groups shown helps stabilize proteins by forming covalent cross-links within or between protein molecules?

Use the figures to answer the question. Which molecule can be a result of mercaptoethanol reduction of a disulfide bridge?

Which action could produce a carbonyl group?

Why are hydrocarbons insoluble in water?

Which of the following is true of carbon?