Chapter 2 Quiz

Which of the following statements is FALSE?

• A) Salts readily dissolve in water.

• B) Water molecules are formed by hydrolysis.

• C) Water freezes from the top down.

• D) Water is formed as a part of a dehydration synthesis reaction.

• E) Water is a polar molecule.

Which of the following is5) Which of the following is the type of bond holding K+ and I- ions in KI?

• A) ionic bond

• B) covalent bond

• C) hydrogen bond

Which of the following is the type of bond between molecules of water in a beaker of water?

• A) ionic bond

• B) covalent bond

• C) hydrogen bond

What is the type of bond holding hydrogen and oxygen atoms together in a single H2O molecule?

• A) ionic bond

• B) covalent bond

• C) hydrogen bond

Identify the following reaction: Glucose + Fructose → Sucrose + Water

• A) dehydration synthesis reaction

• B) hydrolysis reaction

• C) exchange reaction

• D) reversible reaction

• E) ionic reaction

What is the type of weak bond between the hydrogen of one molecule and the nitrogen of another molecule, where the two don't actively share an electron?

• A) ionic bond

• B) covalent bond

• C) hydrogen bond

• D) disulfide bond

• E) hydrophobic bond

Structurally, ATP is most like which type of molecule?

• A) carbohydrate

• B) lipid

• C) protein

• D) nucleic acid

Which molecule is composed of a chain of amino acids?

• A) carbohydrate

• B) lipid

• C) protein

• D) nucleic acid

Radioisotopes are frequently used to label molecules in a cell. The fate of atoms and molecules in a cell can then be followed. Assume Saccharomyces cerevisiae is grown in a nutrient medium containing the radioisotope 32P. After a 48-hour incubation, the majority of the 32P would be found in the S. cerevisiae's

• A) plasma membrane.

• B) cell wall.

• C) water.

• D) proteins.

• E) carbohydrates.

If an amino acid contained a large hydrocarbon (a group of multiple carbons and hydrogens linked together) as its side group, in which of the following categories could it be appropriately designated?

• A) hydrophilic

• B) polar

• C) nonpolar

• D) basic

• E) acidic