$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{P}_i + \text{energy}$$

Question 1

Which of the following best describes the process by which amino acids are joined together to form a protein in the human body?

Accepted Answer

Dehydration synthesis, which removes water to form peptide bonds

Question 2

Which of the following is NOT a function of proteins in the human body?

Accepted Answer

Storage of genetic information

Question 3

Enzymes are crucial for metabolic reactions because they:

Accepted Answer

Lower the activation energy and speed up reactions

Question 4

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

Accepted Answer

DNA contains deoxyribose and is double-stranded

Question 5

What is the main difference between the nucleotides found in DNA and those found in RNA?

Accepted Answer

DNA nucleotides contain deoxyribose and thymine, while RNA nucleotides contain ribose and uracil

Question 6

Which of the following best explains why humans cannot digest cellulose?

Accepted Answer

Humans lack the enzyme required to break the bonds in cellulose

Question 7

Which of the following equations correctly represents the hydrolysis of ATP?

Accepted Answer

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy}$$

Question 8

A mutation causes a change in the sequence of bases in DNA. What is the most likely consequence of this mutation?

Accepted Answer

It may change the RNA sequence and potentially alter the protein produced

Question 9

Which of the following best describes the relationship between DNA, RNA, and proteins?

Accepted Answer

DNA contains the instructions for making RNA, which then directs protein synthesis

Question 10

Which of the following is a correct pairing of DNA bases?

Accepted Answer

Adenine and thymine

Question 11

Which of the following best explains why ATP is considered the universal energy source for cells?

Accepted Answer

ATP releases energy quickly when the bond between its last two phosphate groups is broken

Question 12

Which of the following is true about the structure of RNA?

Accepted Answer

It is single-stranded and contains uracil

Question 13

A scientist is studying a molecule with a ribose sugar, a phosphate group, and the base uracil. This molecule is most likely a:

Accepted Answer

RNA nucleotide

Question 14

Which of the following best describes the role of enzymes in dehydration synthesis?

Accepted Answer

They speed up the joining of monomers by removing water

Question 15

Which of the following is a correct statement about the bonds in DNA?

Accepted Answer

Hydrogen bonds hold the base pairs together

Question 16

If a cell needs to perform a function that requires a rapid supply of energy, which molecule will it most likely use?

Accepted Answer

ATP

Question 17

Which of the following best explains why some amino acids must be obtained from the diet?

Accepted Answer

The body cannot synthesize all amino acids required for protein production

Question 18

Which of the following is a multi-step process involving both dehydration synthesis and hydrolysis?

Accepted Answer

Formation of a protein from amino acids and its subsequent digestion

Question 19

Which of the following best describes the structure of ATP?

Accepted Answer

Adenine, ribose, and three phosphate groups

Question 20

Which of the following is a real-life example of enzyme specificity?

Accepted Answer

Humans can digest starch but not cellulose due to the presence or absence of specific enzymes

Macromolecules: Proteins, Nucleic Acids, and ATP

Study Guide - Practice Questions