Q: Which of the following equations correctly represents the hydrolysis of a disaccharide into two monosaccharides?

$$ \text{C}_{12}\text{H}_{22}\text{O}_{11} + \text{H}_2\text{O} \rightarrow 2\ \text{C}_6\text{H}_{12}\text{O}_6 $$

Question 1

Which property of water is primarily responsible for the ability of some insects to walk on the surface of a pond without sinking?

Accepted Answer

Cohesion due to hydrogen bonding

Question 2

A scientist is studying a macromolecule that contains the elements C, H, O, N, and P. Which type of macromolecule is she most likely analyzing?

Accepted Answer

Nucleic acid

Question 3

Which of the following best explains why ice floats on liquid water?

Accepted Answer

Hydrogen bonds in ice keep water molecules farther apart than in liquid water

Question 4

Which of the following is a correct description of a dehydration synthesis reaction?

Accepted Answer

A reaction that forms a covalent bond between monomers by removing a water molecule

Question 5

A patient is diagnosed with a genetic disorder that affects the folding of proteins. Which level of protein structure is most directly impacted by this disorder?

Accepted Answer

Tertiary structure

Question 6

Which of the following statements about saturated and unsaturated fatty acids is correct?

Accepted Answer

Unsaturated fatty acids have one or more double bonds and are usually liquid at room temperature

Question 7

Which of the following best describes the role of phosphodiester bonds in nucleic acids?

Accepted Answer

They connect the sugar of one nucleotide to the phosphate of the next

Question 8

A researcher adds a drop of oil to a beaker of water. The oil forms a separate layer on top of the water. Which property of lipids explains this observation?

Accepted Answer

Lipids are nonpolar and hydrophobic

Question 9

Which of the following equations correctly represents the hydrolysis of a disaccharide into two monosaccharides?

Accepted Answer

$$ 	ext{C}_{12}	ext{H}_{22}	ext{O}_{11} + 	ext{H}_2	ext{O} ightarrow 2\ 	ext{C}_6	ext{H}_{12}	ext{O}_6 $$

Question 10

Which of the following best explains why water is an excellent solvent for ionic and polar substances?

Accepted Answer

Water molecules are polar and can surround and separate ions and polar molecules

Question 11

Which of the following is a function of carbohydrates in living organisms?

Accepted Answer

Providing structural support and energy storage

Question 12

A mutation changes a single amino acid in the primary structure of a protein. Which of the following outcomes is most likely?

Accepted Answer

The protein's tertiary structure may be altered, affecting its function

Question 13

Which of the following statements about DNA and RNA is correct?

Accepted Answer

DNA is usually double-stranded, while RNA is typically single-stranded

Question 14

Which of the following best describes the secondary structure of a protein?

Accepted Answer

The folding or coiling of the polypeptide into alpha-helices and beta-pleated sheets stabilized by hydrogen bonds

Question 15

Which of the following elements is NOT a major element found in living organisms?

Accepted Answer

Lead

Question 16

A cell membrane is primarily composed of which type of macromolecule?

Accepted Answer

Lipids

Question 17

Which of the following best explains why enzymes are specific to their substrates?

Accepted Answer

The three-dimensional shape of the enzyme's active site matches only specific substrates

Question 18

Which of the following is a correct pairing of a macromolecule and its monomer?

Accepted Answer

Carbohydrate – Monosaccharide

Question 19

Which of the following best describes the role of hydrogen bonds in the structure of DNA?

Accepted Answer

They hold the two strands of DNA together between complementary bases

Question 20

A person is unable to digest lactose due to a deficiency in the enzyme lactase. Which type of macromolecule is directly affected by this condition?

Accepted Answer

Carbohydrate

Chemistry of Life: Structure and Function of Biomolecules

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