Question 1

Which molecule serves as the primary energy currency of the cell?

Accepted Answer

Adenosine triphosphate (ATP)

Answer

Glucose

Answer

Lipids

Answer

DNA

Question 2

Which biomolecule is primarily responsible for the storage and transmission of genetic information in cells?

Accepted Answer

Nucleic Acid

Answer

Lipid

Answer

Carbohydrate

Answer

Protein

Question 3

What is the function of enzymes in biochemical reactions?

Accepted Answer

Enzymes speed up chemical reactions by lowering the activation energy required.

Answer

Enzymes inhibit chemical reactions by increasing the activation energy needed.

Answer

Enzymes store energy for later use in cells.

Answer

Enzymes have no effect on chemical reactions.

Question 4

Which of the following macromolecules is the main component of cell membranes?

Accepted Answer

Phospholipids

Answer

Cholesterol

Answer

Glycogen

Answer

Cellulose

Question 5

What is the term used to describe the process by which a protein loses its structure and functionality due to extreme changes in temperature or pH?

Accepted Answer

Denaturation

Answer

Transcription

Answer

Replication

Answer

Translation

Question 6

What is the primary function of lipids in cells?

Accepted Answer

Energy storage and insulation

Answer

Facilitate protein synthesis

Answer

Maintain genetic information

Answer

Regulate cell communication

Question 7

Which of the following macromolecules is composed of amino acids and plays a crucial role in cell structure and function?

Accepted Answer

Protein

Answer

Lipid

Answer

Nucleic acid

Answer

Carbohydrate

Question 8

What is the primary function of nucleic acids in cells?

Accepted Answer

Store and transmit genetic information

Answer

Provide quick energy source

Answer

Regulate body temperature

Answer

Facilitate muscle movement

Question 9

What is the chemical formula for glucose, a primary source of energy for living organisms?

Accepted Answer

C6H12O6

Answer

NaCl

Answer

H2O2

Answer

CO2

Question 10

What is the chemical formula for water?

Accepted Answer

H2O

Answer

CO2

Answer

NaCl

Answer

NH3

Question 11

Which of the following is a property of water?

Accepted Answer

Water expands when it freezes

Answer

Water does not change when it freezes

Answer

Water contracts when it freezes

Answer

Water becomes more dense when it freezes

Question 12

What is the pH of pure water?

Accepted Answer

7

Answer

9

Answer

5

Answer

12

Question 13

What is the unique property of water that allows it to form droplets and create surface tension?

Accepted Answer

Hydrogen bonding

Answer

Ionic bonding

Answer

Covalent bonding

Answer

Van der Waals forces

Question 14

What is the main function of water in the human body?

Accepted Answer

Regulating body temperature

Answer

Providing energy

Answer

Transporting oxygen

Answer

Building muscles

Question 15

What is the primary reason why water is considered a universal solvent?

Accepted Answer

Its ability to dissolve a wide range of substances

Answer

Its high boiling point

Answer

Its lack of taste

Answer

Its colorless appearance

Question 16

Which factor can affect the activity of enzymes?

Accepted Answer

pH level

Answer

Sunlight exposure

Answer

Temperature

Answer

Physical exercise

Question 17

What is the function of inhibitors in enzyme activity?

Accepted Answer

Inhibitors decrease or block enzyme activity

Answer

Inhibitors change the structure of enzymes

Answer

Inhibitors increase enzyme activity

Answer

Inhibitors have no effect on enzyme activity

Question 18

What is the substance on which an enzyme acts to catalyze a reaction called?

Accepted Answer

Substrate

Answer

Product

Answer

Catalyst

Answer

Enzyme

Question 19

Which class of biomolecules do enzymes primarily belong to?

Accepted Answer

Proteins

Answer

Carbohydrates

Answer

Nucleic Acids

Answer

Lipids

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