Question 1

Which of the following statements correctly describes the difference between a dehydration reaction and hydrolysis in the context of macromolecule synthesis and breakdown?

Accepted Answer

Dehydration reactions remove water to join monomers into polymers, while hydrolysis adds water to break polymers into monomers.

Question 2

Which macromolecule is NOT considered a true polymer, and why?

Accepted Answer

Lipids, because they are not made of repeating monomer units.

Question 3

A scientist is studying a molecule with the formula $$C_6H_{12}O_6$. Which class of macromolecule does this molecule most likely belong to?

Accepted Answer

Carbohydrate

Question 4

Which of the following is a correct example of a dehydration reaction in biological systems?

Accepted Answer

Joining two glucose molecules to form maltose, releasing a water molecule.

Question 5

Which of the following best explains why cellulose cannot be digested by most animals, including humans?

Accepted Answer

Cellulose contains beta glycosidic linkages, and most animals lack enzymes to hydrolyze these bonds.

Question 6

Which of the following is a structural polysaccharide found in the exoskeletons of arthropods and the cell walls of fungi?

Accepted Answer

Chitin

Question 7

A patient is advised to reduce their intake of saturated fats. Which of the following statements best describes saturated fats?

Accepted Answer

Saturated fats have the maximum number of hydrogen atoms and are solid at room temperature.

Question 8

Which of the following correctly describes the structure and function of phospholipids in biological membranes?

Accepted Answer

Phospholipids have two fatty acid tails and a hydrophilic head, forming a bilayer in water.

Question 9

Steroids, such as cholesterol and testosterone, are classified as which type of macromolecule, and what is their defining structural feature?

Accepted Answer

Lipids; they have a carbon skeleton consisting of four fused rings.

Question 10

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

Accepted Answer

Carbohydrate – Monosaccharide

Question 11

Which process is responsible for the breakdown of glycogen in liver cells to release glucose when blood sugar is low?

Accepted Answer

Hydrolysis

Question 12

Which of the following best explains the unique properties of macromolecules in living organisms?

Accepted Answer

Their properties arise from the orderly arrangement and interactions of their atoms.

Question 13

Which of the following is a correct statement about the function of fats in mammals?

Accepted Answer

Fats store long-term energy, cushion vital organs, and insulate the body.

Question 14

Which of the following is a correct description of a glycosidic linkage?

Accepted Answer

A covalent bond formed between two monosaccharides during a dehydration reaction.

Question 15

A food scientist is analyzing a sample and finds it contains a high amount of omega-3 fatty acids. Which statement is true about omega-3 fatty acids?

Accepted Answer

They are essential unsaturated fatty acids required for normal growth.

Question 16

Which of the following best describes the difference between starch and glycogen?

Accepted Answer

Starch is a storage polysaccharide in plants, while glycogen is a storage polysaccharide in animals.

Question 17

Which of the following is a real-world consequence of consuming trans fats produced by hydrogenation of vegetable oils?

Accepted Answer

Trans fats may contribute more to cardiovascular disease than saturated fats.

Question 18

Which of the following correctly matches a macromolecule with its primary biological function?

Accepted Answer

Carbohydrates – Provide energy and structural support

Question 19

Which of the following statements about the formation of a phospholipid bilayer is correct?

Accepted Answer

Phospholipid heads interact with water, while tails avoid water.

Question 20

Which of the following is a correct example of a monomer and its corresponding polymer?

Accepted Answer

Amino acid – Protein

Macromolecules: Structure, Function, and Diversity in Biology

Guida di studio - Domande di pratica

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