Quiz 4
What functional group is commonly used in cells to transfer energy from one organic molecule to another? A) carboxyl B) sulfhydryl C) hydroxyl D) phosphate E) amino
Answer : D
A compound contains hydroxyl groups as its predominant functional group. Which of the following statements is true concerning this compound? A) It lacks an asymmetric carbon and it is probably a fat or lipid. B) It should dissolve in water. C) It should dissolve in a nonpolar solvent. D) It won't form hydrogen bonds with water. E) It is hydrophobic.
Answer: B
Research indicates that ibuprofen a drug used to relieve inflammation and pain is a mixture of two enantiomers; that is molecules that A) have identical chemical formulas but differ in the branching of their carbon skeletons. B) are mirror images of one another. C) exist in either linear chain or ring forms. D) differ in the location of their double bonds. E) differ in the arrangement of atoms around their double bonds.
Answer: B
Testosterone and estradiol are A) soluble in water. B) structural isomers of each other. C) proteins. D) lipids. E) enantiomers of each other.
Answer: B
Why are hydrocarbons insoluble in water? A) The majority of their bonds are polar covalent carbon-to-hydrogen linkages. B) The majority of their bonds are nonpolar covalent carbon-to-hydrogen linkages. C) They are hydrophilic. D) They are lighter than water. E) They exhibit considerable molecular complexity and diversity.
Answer: B
A carbon atom is most likely to form what kind of bond(s) with other atoms? A) ionic B) hydrogen C) covalent D) covalent bonds and hydrogen bonds E) ionic bonds covalent bonds and hydrogen bonds
Answer: C
The element present in all organic molecules is A) hydrogen. B) oxygen. C) carbon. D) nitrogen. E) phosphorus.
Answer: C
Which two functional groups are always found in amino acids? A) ketone and methyl B) carbonyl and amino C) carboxyl and amino D) amino and sulfhydryl E) hydroxyl and carboxyl
Answer: C
How many electron pairs does carbon share in order to complete its valence shell? A) 1 B) 2 C) 3 D) 4 E) 8
Answer: D
Which of the following is a false statement concerning amino groups? A) They are basic in pH. B) They are found in amino acids. C) They contain nitrogen. D) They are nonpolar. E) They are components of urea.
Answer: D
