Question 1

Which type of bond is responsible for linking monosaccharides together to form polysaccharides during dehydration synthesis?

Accepted Answer

Glycosidic linkage

Question 2

A scientist isolates a molecule with the formula $$C_{24}H$$_{42}$$O_4$$ and identifies four fused carbon rings in its structure. Which class of macromolecule does this molecule most likely belong to?

Accepted Answer

Steroid (a type of lipid)

Question 3

Which of the following best describes the process of hydrolysis in biological systems?

Accepted Answer

It adds water to break covalent bonds between monomers, requiring energy input.

Question 4

A DNA molecule contains 240 adenine bases and 160 thymine bases out of 1,000 total bases. How many guanine bases are present?

Accepted Answer

300

Question 5

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

Accepted Answer

Unsaturated fatty acids are more likely to be liquid at room temperature due to the presence of double bonds.

Question 6

Which of the following best explains why cellulose and starch, both polymers of glucose, have different functions in plants?

Accepted Answer

Cellulose and starch have different types of glycosidic linkages, resulting in different three-dimensional structures.

Question 7

Which of the following is NOT a function of proteins in living organisms?

Accepted Answer

Long-term energy storage

Question 8

A triglyceride is formed by the dehydration synthesis of which components?

Accepted Answer

One glycerol molecule and three fatty acids

Question 9

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

Accepted Answer

The sequence of amino acids in a polypeptide chain

Question 10

Which type of macromolecule contains phosphodiester bonds and is responsible for storing genetic information?

Accepted Answer

Nucleic acids

Question 11

Which of the following best explains why changing the shape of a protein can alter its function?

Accepted Answer

The function of a protein is determined by its three-dimensional structure, which is specific to its shape.

Question 12

Which of the following is a derivative of glucose that provides structural support in the exoskeletons of arthropods and cell walls of fungi?

Accepted Answer

Chitin

Question 13

Which of the following best describes the role of ATP in the cell?

Accepted Answer

It is the energy currency of the cell, providing energy for cellular processes.

Question 14

A patient is found to have a buildup of plaque in their arteries. Which type of dietary fat is most likely contributing to this condition?

Accepted Answer

Saturated fatty acids

Question 15

Which of the following statements about phospholipids is correct?

Accepted Answer

They are composed of a glycerol backbone, two fatty acids, and a phosphate group.

Question 16

Which of the following best describes the difference between alpha and beta glucose in polysaccharides?

Accepted Answer

Alpha glucose forms starch, while beta glucose forms cellulose due to differences in the orientation of the hydroxyl group on carbon 1.

Question 17

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

Accepted Answer

Protein – Amino acid

Question 18

Which of the following best explains why trans fats are considered unhealthy compared to cis fats?

Accepted Answer

Trans fats have a straighter structure, allowing them to pack tightly and contribute to arterial plaque.

Question 19

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

Accepted Answer

The arrangement and interaction of multiple polypeptide subunits in a protein complex

Question 20

Which of the following is a real-world application of hydrolysis in medicine?

Accepted Answer

Dissolving surgical stitches made of chitin derivatives

Biological Macromolecules: Structure, Function, and Types

Guida di studio - Domande di pratica

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