Question 1

Which of the following best describes an organic compound?

Accepted Answer

A molecule that always contains carbon and hydrogen, often with oxygen, nitrogen, or phosphorus, and is generally complex.

Question 2

Which functional group is found in both amino acids and lipids, and is represented by $$-COOH$$?

Accepted Answer

Carboxyl group

Question 3

A dehydration synthesis reaction between two glucose molecules results in which of the following?

Accepted Answer

Formation of a disaccharide and release of a water molecule

Question 4

Which of the following best explains the relationship between monomers and polymers?

Accepted Answer

Polymers are large molecules made by joining many monomers together through covalent bonds.

Question 5

Which of the following is a correct example of hydrolysis in the human body?

Accepted Answer

Breaking down glycogen into glucose molecules during fasting

Question 6

Which of the following statements about carbohydrates is TRUE?

Accepted Answer

Their monomers have the general formula $$(CH_2O)_n$$ and they are often used for energy storage.

Question 7

Which of the following is NOT a correct pairing of macromolecule and its monomer?

Accepted Answer

Lipid – Nucleotide

Question 8

A patient is unable to produce sufficient ATP. Which macromolecule is directly involved in the storage and transfer of energy in cells?

Accepted Answer

Nucleic acids

Question 9

Which of the following best describes the structure of a phospholipid?

Accepted Answer

A molecule with a glycerol backbone, two fatty acid tails, and a phosphate head

Question 10

Which level of protein structure is primarily determined by hydrogen bonding between the backbone atoms of the polypeptide chain, resulting in alpha helices and beta sheets?

Accepted Answer

Secondary structure

Question 11

A mutation causes a single amino acid substitution in hemoglobin, leading to sickle cell anemia. Which level of protein structure is directly affected by this mutation?

Accepted Answer

Primary structure

Question 12

Which of the following is a physiological role of lipids in the human body?

Accepted Answer

Major component of cell membranes

Question 13

Which of the following best explains why protein denaturation leads to loss of function?

Accepted Answer

Denaturation disrupts the three-dimensional shape required for the protein's specific function.

Question 14

Which of the following is a correct description of the process of ATP hydrolysis?

Accepted Answer

ATP is broken down into ADP and inorganic phosphate, releasing energy.

Question 15

Which of the following best describes the difference between DNA and RNA?

Accepted Answer

DNA is double-stranded and contains thymine, while RNA is single-stranded and contains uracil.

Question 16

Which of the following is an example of a polysaccharide found in the human body and its primary function?

Accepted Answer

Glycogen; storage of glucose in liver and muscle cells

Question 17

A scientist is studying a molecule with the formula $$C_{16}H$$_{32}$$O_2. $$This molecule is most likely a:

Accepted Answer

Fatty acid

Question 18

Which of the following bonds is responsible for linking nucleotides together in a DNA strand?

Accepted Answer

Phosphodiester bond

Question 19

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

Accepted Answer

The arrangement of two or more polypeptide chains into a functional protein complex

Question 20

A patient is diagnosed with a disorder that prevents the formation of glycoproteins. Which of the following processes is most likely impaired?

Accepted Answer

Covalent binding of polysaccharides to proteins

Organic Macromolecules: Structure, Function, and Biological Roles

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