Q: What is the correct chemical equation for the hydrolysis of ATP?

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

Question 1

Which of the following best describes the difference between saturated and unsaturated fatty acids in triglycerides?

Accepted Answer

Unsaturated fatty acids have fewer hydrogen atoms attached to the carbon chain compared to saturated fatty acids.

Question 2

A patient is diagnosed with high LDL cholesterol. Based on your knowledge of lipoproteins, what is the most likely health risk associated with this condition?

Accepted Answer

Increased risk of heart disease due to cholesterol buildup in arteries.

Question 3

Which level of protein structure is primarily affected when a single amino acid substitution occurs, such as in sickle-cell anemia?

Accepted Answer

Primary structure

Question 4

Which of the following is a polysaccharide that serves as the main energy storage molecule in plants?

Accepted Answer

Starch

Question 5

What is the correct base pairing for DNA and RNA, respectively?

Accepted Answer

DNA: Adenine pairs with thymine; RNA: Adenine pairs with uracil.

Question 6

Which of the following statements about enzymes is correct?

Accepted Answer

Enzyme activity depends on temperature, pH, concentration, and presence of inhibitors.

Question 7

A dehydration reaction is essential for forming which type of carbohydrate?

Accepted Answer

Disaccharides

Question 8

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

Accepted Answer

Catalyzing chemical reactions

Question 9

Which macromolecule contains genetic information and provides instructions for protein synthesis?

Accepted Answer

Nucleic acids

Question 10

What is the correct chemical equation for the hydrolysis of ATP?

Accepted Answer

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

Question 11

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

Accepted Answer

Cellulose is a polysaccharide with a structure that most animals lack enzymes to break down.

Question 12

Which of the following is a correct description of a nucleotide found in DNA?

Accepted Answer

A nucleotide consists of a phosphate group, a deoxyribose sugar, and a nitrogenous base.

Question 13

Which of the following is an example of a disaccharide and its source?

Accepted Answer

Lactose; found in milk

Question 14

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

Accepted Answer

Three-dimensional shape formed by interactions such as disulfide and hydrogen bonds

Question 15

Which macromolecule is primarily responsible for catalyzing chemical reactions in cells?

Accepted Answer

Proteins

Question 16

A mutation causes a change in the pH of a cell, leading to loss of protein function. What is the most likely explanation for this?

Accepted Answer

The protein underwent denaturation due to unfavorable environmental conditions.

Question 17

Which of the following is a function of phospholipids in biological membranes?

Accepted Answer

Forming a bilayer that separates the cell from its environment

Question 18

Which of the following is a correct statement about anabolic steroids?

Accepted Answer

They are synthetic variants of testosterone and can enhance muscle growth but pose health risks.

Question 19

Which of the following best describes the role of ATP in cellular processes?

Accepted Answer

ATP provides energy for cellular processes by hydrolysis of its phosphate bonds.

Biological Macromolecules: Structure, Function, and Types

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