Question

25. Molecules that do not dissolve in water very easily are characteristically A) acids. B) fats. C) vitamins. D) carbohydrates. 26. Organic molecules always A) contain carbon. B) contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio. C) are produced by living organisms. D) dissolve in water. 27. Molecules with the same empirical formula but different structural formulas are A) polymers. B) steroids. C) isomers. D) enzymes. 28. An organic molecule with the empirical formula C6H12O6 A) may have many structural formulae. B) is a carbohydrate. C) is commonly referred to as a sugar. D) All the above are correct. 29. Cell energy is furnished from A) iron. B) water. C) carbohydrates. D) All are true. 30. Which of the following best describes the structure of DNA? A) single helix B) protein coil C) double helix D) globular RNA

          25. Molecules that do not dissolve in water very easily are characteristically
A) acids.
B) fats.
C) vitamins.
D) carbohydrates.
26. Organic molecules always
A) contain carbon.
B) contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio.
C) are produced by living organisms.
D) dissolve in water.
27. Molecules with the same empirical formula but different structural formulas are
A) polymers.
B) steroids.
C) isomers.
D) enzymes.
28. An organic molecule with the empirical formula C6H12O6
A) may have many structural formulae.
B) is a carbohydrate.
C) is commonly referred to as a sugar.
D) All the above are correct.
29. Cell energy is furnished from
A) iron.
B) water.
C) carbohydrates.
D) All are true.
30. Which of the following best describes the structure of DNA?
A) single helix
B) protein coil
C) double helix
D) globular RNA

25. Molecules that do not dissolve in water very easily are characteristically
A) acids.
B) fats.
C) vitamins.
D) carbohydrates.
26. Organic molecules always
A) contain carbon.
B) contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio.
C) are produced by living organisms.
D) dissolve in water.
27. Molecules with the same empirical formula but different structural formulas are
A) polymers.
B) steroids.
C) isomers.
D) enzymes.
28. An organic molecule with the empirical formula C6H12O6
A) may have many structural formulae.
B) is a carbohydrate.
C) is commonly referred to as a sugar.
D) All the above are correct.
29. Cell energy is furnished from
A) iron.
B) water.
C) carbohydrates.
D) All are true.
30. Which of the following best describes the structure of DNA?
A) single helix
B) protein coil
C) double helix
D) globular RNA

Added by William C.

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