BIO 110 Exam 1 Practice Test

You arrive late to a biological seminar. However, just as you enter the room, you hear the speaker referring to the "amino" and "carboxy" terminus. Immediately you know that the speaker is talking about a

A. carbohydrate. B. nucleic acid. C. protein. D. triglyceride. E. phospholipid.

Refer to the figure above. What type of covalent bonds bind these types of monomers together to form a polymer?

A. esther bonds B. peptide bonds C. β linkages D. α linkages E. phosphodiester bonds

Which of the following is true of hydrogen bonds?

A. Hydrogen bonds bind monomers together to form polymers. B. Hydrogen bonds hold strands of RNA together making it double stranded. C. Hydrogen bonds hold strands of DNA together making it double stranded. D. B and C are true. E. None of the above.

What statement below best describes nonpolar molecules?

A. Nonpolar molecules are hydrophilic and can mix with water molecules. B. Nonpolar molecules are hydrophilic and do not mix with water molecules. C. Nonpolar molecules are hydrophobic and can mix with water molecules. D. Nonpolar molecules are hydrophobic and do not mix with water molecules.

What do Phospholipids and triglycerides have in common?

A. They are built with the same monomers. B. Both are held together by ester bonds. C. They are both amphipathic. D. A and B are true. E. A and C are true.

What do startch and cellulose have in common?

A. They are polymers of the same monomer. B. The covalent bonds that hold their monomers together are the same. C. Both are energy storage molecules that are only made by plants. D. Both are carbohydrates. E. Both B and D are true.

Concerning the hydrolysis of macromolecules, which of the following is true?

A. Water is used as a reactant. B. Water is generated as a product. C. Water is both a reactant and a product in hydrolysis reactions. D. Hydrolysis reactions are used to build macromolecules. E. Both A and D are true.

If the covalent bonds in a water molecule were nonpolar, what form would water likely take at room temperature?

A. a solid B. It would remain a liquid. C. a gas D. More information is needed.

What would be the net electrical charge of an atom with 4 protons, 5 neutrons, and 5 electrons?

A. 0 B. -1 C. +1 D. +4 E. -4

When enzymes build a single triglyceride, how many water molecules are produced?

A. 0 B. 1 C. 2 D. 3 E. 6

At a pH of 6, the concentration of protons in solution is

A. 10 times lower than it is at a pH of 7. B. 10 times higher than it is at a pH of 7. C. 100 times lower than it is at a pH of 7. D. 100 times higher than it is at a pH of 7. E. None of the above is correct.

Two atoms are bonded together but not sharing electrons. What type of bond(s) could be holding the atoms together?

A. A covalent bond. B. A hydrogen bond. C. An ionic bond. D. It could be A or B E. It could be B or C

Refer to the figure above. Of the parts of the monomer labeled A, B, and C, which represents the nitrogenous base?

A. A. B. B. C. C. D. None of the above.

Refer to the figure above. What best describes this monomer:

A. An amino acid. B. A monosaccharide. C. A lipid. D. An RNA nucleotide. E. A DNA nucleotide.

Consider the following electronegativity values: Boron (B) = 1.8 Carbon (C) = 2.5 Chlorine (CL) = 3.2 Selenium (Se) = 2.6 Which of the following covalent bonds is the most polar?

A. C-Se2 B. C-CL C. B-CL D. Se-CL E. More information is needed.