According to Boyle's Law, at a constant temperature, the volume of a gas is inversely proportional to its:
A. Density
B. Mass
C. Pressure
D. Temperature
C. Pressure
Which of the following is a major category of biomolecules that serves as a quick source of energy in an organism?
A. Carbohydrates
B. Lipids
C. Nucleic Acid
D. Proteins
A. Carbohydrates
The monomers of nucleic acids are called:
A. Amino acids
B. Fatty acids
C. Monosaccharides
D. Nucleotides
D. Nucleotides
Which principle is applied to chemical reaction to ensure the conservation of mass?
A. Principle of energy conservation
B. Principle of matter conservation
C. Principle of charge of conservation
D. Principle of momentum conservation
B. Principle of matter conservation
When balancing a chemical equation, which is adjusted to ensure the conservation of mass?
A. Coefficients
B. Covalent bonds
C. Exponents
D. Subscript
A. Coefficients
Charles' Law states that, at constant pressure, the volume of a gas is directly proportional to its:
A. Density
B. Mass
C. Pressure
D. Temperature
D. Temperature
Which biomolecule category includes DNA and RNA?
A. Carbohydrates
B. Lipids
C. Nucleic Acid
D. Proteins
C. Nucleic Acid
What is the main function of proteins in organism?
A. Energy storage
B. Enzyme catalysis
C. Organic information storage
D. Structural support
B. Enzyme catalysis
The law of conservation of mass states that the total mass of the reactants in a chemical reaction is equal to the total mass of the:
A. Catalysts
B. Impurities
C. Products
D. Solvents
C. Products
When balancing a chemical equation, which mathematical operation is used to adjust the coefficients?
A. Addition
B. Division
C. Multiplication
D. Subtraction
C. Multiplication
The relationship between volume and pressure at a constant temperature of a gas is directly proportional to its:
A. Avogadro's Law
B. Boyle's Law
C. Charles' Law
D. Gay-Lussac's Law
B. Boyle's Law
How do lipids differ from other biomolecule?
A. They are insoluble in water
B. They contain genetic information
C. They are composed of amino acid
D. They have a complex three-dimensional structure
A. They are insoluble in water
Which biomolecule category would you expect to find in high amounts in a cell that requires a long term energy storage mechanism?
A. Carbohydrates
B. Lipids
C. Nucleic Acid
D. Proteins
B. Lipids
In a chemical reaction, if a certain amount of reactant A is consumed, what happens to the amount of product B produced, according to the conservation of mass?
A. It increases
B. It decreases
C. It remains the same
D. It cannot be determined
C. It remains the same
According to the law of conservation of mass, why is it necessary to balance a chemical equation?
A. To ensure the equation obeys the law of definite proportion
B. To ensure the equation obeys the law of multiple proportions
C. To demonstrate that matter neither created nor destroyed in chemical reaction
D. To calculate the exact amount of products formed in a chemical reaction
C. To demonstrate that matter neither created nor destroyed in chemical reaction
When investigating the relationship between volume and temperature at constant pressure of a gas, what happens to the volume as the temperature increases?
A. It increases
B. It decreases
C. It remains constant
D. It fluctuates randomly
A. It increases
Which major category of biomolecules is responsible for carrying out most of the cellular functions in living organisms?
A. Carbohydrates
B. Lipids
C. Nucleic acids
D. Proteins
D. Proteins
A researcher is studying the effects of a new drug on protein synthesis in cells. Which biomolecule category is the directly involved in protein synthesis?
A. Carbohydrates
B. Lipids
C. Nucleic acids
D. Proteins
C. Nucleic acids
How is the principle of conservation of mass related to the concepts of atoms in a chemical reaction?
A. Atoms change their properties in a chemical reaction
B. Atoms are created or destroyed in chemical reaction
C. Atoms combine to form new substances in chemical reaction
D. Atoms rearrange in chemical reaction without any change in total number
D. Atoms rearrange in chemical reaction without any change in total number
Balance the following chemical equation: H2 + O2 ---> H2O
A. 2H2 +O2 ---> 2H2O
B. H2 + O2 ---> H2O
C. H2 + 2O2 ---> H2O
D. 2H2 + 2O2 ---> 2H2O
A. 2H2 +O2 ---> 2H2O
A student is conducting an experiment to investigate the relationship between volume and pressure at constant temperature of a gas. They collect data and plot a graph of volume versus pressure. How would analyzing the graph help student understand the relationship between volume and pressure?
A. By identifying any outliers in the data
B. By determining the accuracy of the experimental setup
C. By calculating the percentage error in the measurements
D. By visually observing the trend and patterns in the data
D. By visually observing the trend and patterns in the data
A student is studying the structure and function of a particular biomolecule. They observe that it consists of a long chain of repeating sugar units. Which major category of biomolecules is most likely being studied, and what would be its primary function?
A. Lipids; enzyme catalysis
B. Carbohydrates; energy storage
C. Proteins; structural support
D. Nucleic acids; genetic information storage
B. Carbohydrates; energy storage
How are proteins different from carbohydrates and lipids?
A. They are insoluble in water
B. They are compose of nucleotides
C. They provide quick energy to cells
D. They are specific amino acid sequence
D. They are specific amino acid sequence
According to the principle of conservation of mass, what happens to the total mass of substances involved in chemical reaction?
A. It increases
B. It decreases
C. It remains the same
D. It fluctuates randomly
C. It remains the same
In creating a chemical equation that represents the combustion of methane (CH4) in the presence of oxygen (O2) to produce carbon dioxide (CO2) and water (H2O), which of the following options correctly represents the balanced equation?
A. CH4 + O2 ---> CO2 + H2O
B. CH4 + 2O2 ---> CO2 + 2H2O
C. CH4 + O2 ---> CO2 + 2H2O
D. 2CH4 + O2 ---> CO2 + 2H2O
B. CH4 + 2O2 ---> CO2 + 2H2O