Q1. In a chemical equation, what is typically shown on the left side of the equation?

Background

Topic: Chemical Reactions and Equations

This question tests your understanding of how chemical equations are written and the terminology for the substances involved.

Key Terms:

• Reactant: A substance that takes part in and undergoes change during a reaction.

• Product: The substances formed as a result of a chemical reaction.

Step-by-Step Guidance

1. Recall the general format of a chemical equation: .

2. Identify which side (left or right) the reactants and products are placed on in this format.

3. Consider the role of enzymes in chemical reactions and whether they are typically shown in the equation itself.

Try solving on your own before revealing the answer!

Q2. Which of the following is NOT a subatomic particle associated with an atom?

Background

Topic: Atomic Structure

This question tests your knowledge of the basic components that make up an atom.

Key Terms:

• Subatomic particles: Particles smaller than an atom, including protons, neutrons, and electrons.

• Compound: A substance made of two or more different elements chemically bonded together.

Step-by-Step Guidance

1. List the three main subatomic particles found in atoms.

2. Review the definition of a compound and determine if it is a subatomic particle.

3. Compare each answer choice to see which does not fit the definition of a subatomic particle.

Try solving on your own before revealing the answer!

Q3. An atom with 10 electrons will have ________ electrons in the valence (outer) electron shell.

Background

Topic: Electron Configuration

This question tests your understanding of how electrons are arranged in shells around the nucleus of an atom.

Key Terms and Concepts:

• Valence shell: The outermost electron shell of an atom.

• For most atoms, the first shell holds up to 2 electrons, the second up to 8.

Step-by-Step Guidance

1. Determine how many electrons fill the first shell (K shell).

2. Subtract the electrons in the first shell from the total to find how many are in the second shell (L shell).

3. Recall the maximum number of electrons the second shell can hold.

Try solving on your own before revealing the answer!

Q4. Polar molecules, like water, result when electrons are shared ___.

Background

Topic: Chemical Bonding – Polarity

This question tests your understanding of how polar covalent bonds are formed.

Key Terms:

• Polar covalent bond: A bond where electrons are shared unequally between atoms, leading to partial charges.

• Nonpolar covalent bond: Electrons are shared equally.

Step-by-Step Guidance

1. Recall what makes a molecule polar (difference in electronegativity between atoms).

2. Consider how electrons are shared in polar versus nonpolar covalent bonds.

3. Identify which answer choice describes unequal sharing of electrons.

Try solving on your own before revealing the answer!

Q5. An example of a synthesis/anabolic reaction is when amino acids join to form a/an ________.

Background

Topic: Types of Chemical Reactions – Synthesis/Anabolic

This question tests your knowledge of how macromolecules are formed from smaller building blocks.

Key Terms:

• Synthesis (anabolic) reaction: A reaction where smaller molecules combine to form a larger molecule.

• Amino acids: The building blocks of proteins.

Step-by-Step Guidance

1. Recall what macromolecule is formed by joining amino acids together.

2. Review the definitions of carbohydrate, protein, monomer, and nucleic acid.

3. Identify which option is the polymer made from amino acids.

Try solving on your own before revealing the answer!

Q6. In a 10% salt solution, the water is the:

Background

Topic: Solutions and Mixtures

This question tests your understanding of the components of a solution.

Key Terms:

• Solvent: The substance present in the greatest amount; dissolves the solute.

• Solute: The substance dissolved in the solvent.

Step-by-Step Guidance

1. Identify which component (salt or water) is present in the greater amount in a 10% salt solution.

2. Recall the definitions of solute and solvent.

3. Determine which term applies to water in this context.

Try solving on your own before revealing the answer!

Q7. Glycogen and starch are examples of a specific category of carbohydrates called ________.

Background

Topic: Carbohydrates – Types and Functions

This question tests your knowledge of the classification of carbohydrates.

Key Terms:

• Monosaccharide: Simple sugar molecule.

• Polysaccharide: Large carbohydrate molecule made of many monosaccharides.

Step-by-Step Guidance

1. Recall the structure of glycogen and starch (many glucose units linked together).

2. Review the definitions of monosaccharide, polysaccharide, and other options.

3. Identify which term describes large, complex carbohydrates like glycogen and starch.

Try solving on your own before revealing the answer!

Q8. Unsaturated fatty acid chains contain one or more ________ bonds between carbon atoms.

Background

Topic: Lipids – Fatty Acid Structure

This question tests your understanding of the chemical structure of unsaturated fatty acids.

Key Terms:

• Unsaturated fatty acid: Fatty acid with one or more double bonds between carbon atoms.

• Peptide bond: Bond between amino acids in proteins.

Step-by-Step Guidance

1. Recall the difference between saturated and unsaturated fatty acids.

2. Identify the type of bond that creates kinks in the fatty acid chain.

3. Review the answer choices and select the bond type found in unsaturated fatty acids.

Try solving on your own before revealing the answer!

Q9. Elements are composed of building blocks known as ________.

Background

Topic: Basic Chemistry – Elements and Atoms

This question tests your understanding of the fundamental units of matter.

Key Terms:

• Atom: The smallest unit of an element that retains its properties.

• Molecule: Two or more atoms bonded together.

Step-by-Step Guidance

1. Recall what an element is and what it is made of at the smallest level.

2. Review the definitions of atom, molecule, compound, and polymer.

3. Identify which term refers to the basic building block of elements.

Try solving on your own before revealing the answer!

Q10. An atom of magnesium that has lost two electrons would be known as a(n) ________.

Background

Topic: Ions and Atomic Structure

This question tests your understanding of how ions are formed and their charges.

Key Terms:

• Cation: A positively charged ion (lost electrons).

• Anion: A negatively charged ion (gained electrons).

Step-by-Step Guidance

1. Recall what happens to the charge of an atom when it loses electrons.

2. Review the definitions of cation and anion.

3. Determine which term applies to a magnesium atom that has lost two electrons.

Try solving on your own before revealing the answer!

Q11. Isotopes have different numbers of ________.

Background

Topic: Isotopes and Atomic Structure

This question tests your understanding of what distinguishes isotopes of the same element.

Key Terms:

• Isotope: Atoms of the same element with different numbers of neutrons.

• Proton: Determines the element's identity.

Step-by-Step Guidance

1. Recall what stays the same and what changes in isotopes of an element.

2. Review the definitions of protons, neutrons, and electrons.

3. Identify which subatomic particle varies in number among isotopes.

Try solving on your own before revealing the answer!

Q12. Hydrogen bonding between water molecules is responsible for ________.

Background

Topic: Intermolecular Forces – Hydrogen Bonding

This question tests your understanding of the effects of hydrogen bonding in water.

Key Terms:

• Hydrogen bond: A weak bond between two molecules resulting from an electrostatic attraction.

• Surface tension: The elastic tendency of a fluid surface due to intermolecular forces.

Step-by-Step Guidance

1. Recall the unique properties of water due to hydrogen bonding.

2. Review which property among the options is directly caused by hydrogen bonds between water molecules.

3. Eliminate options that are not a result of hydrogen bonding.

Try solving on your own before revealing the answer!

Q13. Carbon - carbon bonds are ___ bonds because of their equal sharing of a pair of electrons.

Background

Topic: Covalent Bonding

This question tests your understanding of the difference between polar and nonpolar covalent bonds.

Key Terms:

• Nonpolar covalent bond: Electrons are shared equally between atoms.

• Polar covalent bond: Electrons are shared unequally.

Step-by-Step Guidance

1. Recall the definition of nonpolar covalent bonds and how they differ from polar covalent bonds.

2. Consider the electronegativity of carbon atoms and how it affects electron sharing.

3. Identify which type of bond is formed between two identical atoms sharing electrons equally.

Try solving on your own before revealing the answer!

Q14. Atomic number is based on the number of these particles in an atom of a particular element.

Background

Topic: Atomic Structure – Atomic Number

This question tests your understanding of what determines an element's atomic number.

Key Terms:

• Atomic number: The number of protons in the nucleus of an atom.

Step-by-Step Guidance

1. Recall which subatomic particle is used to define the atomic number of an element.

2. Review the answer choices: protons, neutrons, electrons.

3. Identify which particle's count is unique for each element.

Try solving on your own before revealing the answer!

Q15. Ionic bonds are formed when these particles are completely transferred from one atom to another.

Background

Topic: Ionic Bonding

This question tests your understanding of how ionic bonds are formed at the atomic level.

Key Terms:

• Ionic bond: A chemical bond formed by the transfer of electrons from one atom to another.

Step-by-Step Guidance

1. Recall which subatomic particle is transferred during the formation of an ionic bond.

2. Review the answer choices: protons, neutrons, electrons.

3. Identify which particle is involved in chemical bonding and transfer.

Try solving on your own before revealing the answer!

Q16. Atomic mass is based on the number of protons plus the number of ___ in an atom of an element.

Background

Topic: Atomic Structure – Atomic Mass

This question tests your understanding of how atomic mass is calculated.

Key Terms:

• Atomic mass: The sum of protons and neutrons in the nucleus.

Step-by-Step Guidance

1. Recall which subatomic particles contribute significantly to atomic mass.

2. Review the answer choices: protons, neutrons, electrons.

3. Identify which particle, along with protons, is counted in atomic mass.

Try solving on your own before revealing the answer!

Q17. DNA, RNA, and ATP are types of ___.

Background

Topic: Biological Macromolecules – Nucleic Acids

This question tests your knowledge of the classification of important biomolecules.

Key Terms:

• Nucleic acids: Macromolecules that store and transmit genetic information.

Step-by-Step Guidance

1. Recall the main classes of biological macromolecules: nucleic acids, proteins, carbohydrates, lipids.

2. Identify which class includes DNA, RNA, and ATP.

3. Review the functions of each class to confirm your answer.

Try solving on your own before revealing the answer!

Q18. Triglyceride, cholesterol, estrogen are examples of:

Background

Topic: Biological Macromolecules – Lipids

This question tests your ability to classify different types of biomolecules.

Key Terms:

• Lipids: A group of organic compounds including fats, oils, and steroids.

Step-by-Step Guidance

1. Recall the four main classes of biomolecules.

2. Identify which class includes triglycerides, cholesterol, and estrogen.

3. Review the functions and structures of each class to confirm your answer.

Try solving on your own before revealing the answer!

Q19. Antibodies, enzymes, and some hormones are examples of:

Background

Topic: Biological Macromolecules – Proteins

This question tests your knowledge of the functions and types of proteins.

Key Terms:

• Proteins: Macromolecules made of amino acids, with diverse functions including catalysis and defense.

Step-by-Step Guidance

1. Recall the main classes of biomolecules and their functions.

2. Identify which class includes antibodies, enzymes, and some hormones.

3. Review the structure and function of proteins to confirm your answer.

Try solving on your own before revealing the answer!

Q20. C6H12O6 is an example of:

Background

Topic: Carbohydrates – Monosaccharides

This question tests your ability to recognize the chemical formula of a simple sugar.

Key Terms:

• Monosaccharide: The simplest form of carbohydrate (e.g., glucose).

Step-by-Step Guidance

1. Recall the general formula for monosaccharides (CH2O)n.

2. Identify which class of biomolecule C6H12O6 belongs to.

3. Review the answer choices and match the formula to the correct class.

Try solving on your own before revealing the answer!

Q21. Which of the following is NOT one of the top four elements of which the body is composed?

Background

Topic: Elements in the Human Body

This question tests your knowledge of the most abundant elements in the human body.

Key Terms:

• Major elements: Oxygen, carbon, hydrogen, nitrogen.

Step-by-Step Guidance

1. Recall the four most abundant elements in the human body.

2. Review the answer choices and identify which is not among the top four.

3. Consider the relative abundance of each element listed.

Try solving on your own before revealing the answer!

Q22. Each known element is designated with a one or two letter chemical shorthand known as the:

Background

Topic: Chemical Symbols

This question tests your knowledge of how elements are represented in chemistry.

Key Terms:

• Chemical symbol: The one- or two-letter abbreviation for an element.

Step-by-Step Guidance

1. Recall what the one- or two-letter abbreviation for each element is called.

2. Review the answer choices and match the correct term.

3. Eliminate options that refer to numbers or equations.

Try solving on your own before revealing the answer!

Q23. A homogeneous mixture of gases, liquids, or solids is referred to as a ___.

Background

Topic: Mixtures and Solutions

This question tests your understanding of the types of mixtures in chemistry.

Key Terms:

• Solution: A homogeneous mixture where the components are evenly distributed.

• Solvent/Solute: Components of a solution.

Step-by-Step Guidance

1. Recall the definition of a homogeneous mixture.

2. Review the answer choices and identify which term matches the definition.

3. Eliminate terms that refer to components of a mixture rather than the mixture itself.

Try solving on your own before revealing the answer!

Q24. Which of the following is NOT an electrolyte?

Background

Topic: Electrolytes in Biology

This question tests your understanding of what substances are considered electrolytes.

Key Terms:

• Electrolyte: A substance that dissociates into ions in solution and conducts electricity.

• Examples: Salts, acids, and bases are electrolytes; water is not.

Step-by-Step Guidance

1. Recall the definition of an electrolyte and what types of substances qualify.

2. Review the answer choices and identify which does not dissociate into ions.

3. Eliminate options that are known to be electrolytes.

Try solving on your own before revealing the answer!

Q25. When acids dissociate/dissolve in water they release ___.

Background

Topic: Acids, Bases, and pH

This question tests your understanding of what happens when acids dissolve in water.

Key Terms:

• Acid: A substance that releases hydrogen ions (H+) in solution.

• Base: A substance that releases hydroxyl ions (OH-).

Step-by-Step Guidance

1. Recall what ions are released when an acid dissolves in water.

2. Review the answer choices and match the correct ion to acids.

3. Eliminate options that are associated with bases or salts.

Try solving on your own before revealing the answer!