What is chemistry?
The science that deals with the composition of substances and the changes that take place in their composition.
What does organic chemistry focus on?
Organic substances that contain carbon and hydrogen.
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p.1
Introduction to Chemistry

What is chemistry?

The science that deals with the composition of substances and the changes that take place in their composition.

p.1
Types of Chemistry: Organic and Biochemistry

What does organic chemistry focus on?

Organic substances that contain carbon and hydrogen.

p.11
Types of Chemical Reactions

What is dehydration synthesis?

A + B → AB + water.

p.6
Atomic Structure and Ions

What characterizes chemically reactive elements?

They do not have their outermost energy level fully occupied by electrons.

p.24
Enzymes and Their Function

What is a benefit of enzymes lowering activation energy?

It results in a conservation of energy.

p.3
Atomic Structure and Ions

What is the primary focus of the document?

Models of the Atom.

p.27
Enzymes and Their Function

What are enzymes made of?

Globular proteins made of amino acids linked by peptide bonds.

p.12
Types of Chemical Reactions

How does the size of reacting molecules affect the rate of chemical reactions?

Smaller molecules have greater kinetic energy, leading to a faster reaction rate.

p.29
Enzymes and Their Function

What is catabolic metabolism?

A process that uses hydrolysis to break large molecules into smaller ones.

p.24
Enzymes and Their Function

What do enzymes lower to facilitate chemical reactions?

Activation energy.

p.2
Energy: Potential and Kinetic

What is energy?

The ability to do work.

p.19
Types of Chemistry: Organic and Biochemistry

What is the primary function of carbohydrates in the body?

To provide energy.

p.18
Types of Chemistry: Organic and Biochemistry

What is the primary function of proteins in the body?

Proteins serve as building blocks for tissues and play a crucial role in various biological processes.

p.18
Types of Chemistry: Organic and Biochemistry

What are proteins made of?

Proteins are made up of amino acids linked together by peptide bonds.

p.26
Enzymes and Their Function

What is the role of the active site in an enzyme?

It is where substrates bind to the enzyme.

p.28
Metabolism

What do amino acids combine with to form proteins?

Energy.

p.25
Enzymes and Their Function

How do enzymes transform substrates?

Enzymes rapidly transform the substrate into a product.

p.30
Energy: Potential and Kinetic

What is the reaction for the breakdown of ATP?

ATP + water → ADP + PO4 + energy.

p.10
Chemical Bonding: Ionic and Covalent

What is an example of hydrogen bonding?

The hydrogen of a water molecule attracting to the oxygen of another water molecule.

p.7
Chemical Bonding: Ionic and Covalent

What is an example of ionic bonding?

Na+ + Cl- → NaCl.

p.24
Enzymes and Their Function

What type of proteins are enzymes made of?

Globular proteins.

p.27
Enzymes and Their Function

How do extreme pH levels affect enzyme activity?

They can denature enzymes, altering their structure and function.

p.19
Types of Chemistry: Organic and Biochemistry

What are carbohydrates?

Organic compounds made up of carbon, hydrogen, and oxygen, typically in a ratio of 1:2:1.

p.22
Matter and Its Properties

What is an isotonic solution?

A solution with the same tonicity where cells neither gain nor lose H2O.

p.28
Metabolism

What is released during dehydration synthesis reactions?

A water molecule.

p.26
Enzymes and Their Function

What occurs during internal rearrangements in enzyme action?

They lead to catalysis.

p.18
Enzymes and Their Function

What role do enzymes play in relation to proteins?

Enzymes are proteins that act as catalysts to speed up chemical reactions in the body.

p.8
Chemical Bonding: Ionic and Covalent

What types of elements typically form ionic bonds?

Typically, metals and nonmetals.

p.14
pH Scale and Its Importance

What is the pH range of basic solutions?

From pH 7.1 to 14.

p.13
Acids, Bases, and Salts

What happens when NaCl is dissolved in water?

It releases Na+ and Cl- ions.

p.13
Acids, Bases, and Salts

What defines a base in terms of electrolytes?

Electrolytes that release anions that can combine with H+.

p.7
Chemical Bonding: Ionic and Covalent

What are the two types of ions involved in ionic bonding?

Cations and anions.

p.24
Enzymes and Their Function

How much can enzymes promote the rate of chemical reactions?

By billions of times.

p.1
Types of Chemistry: Organic and Biochemistry

What is biochemistry?

The chemistry of living organisms, essential for understanding physiology due to chemical changes in cells.

p.20
Types of Chemistry: Organic and Biochemistry

What are nucleic acids?

Biomolecules essential for all forms of life, including DNA and RNA.

p.11
Types of Chemical Reactions

What is decomposition (or hydrolysis)?

AB + water → A + B.

p.11
Types of Chemical Reactions

What is an exchange reaction?

AB + CD → AD + CB.

p.14
pH Scale and Its Importance

What does a higher concentration of H+ ions indicate about a solution's pH?

It results in a lower pH, making the solution more acidic.

p.14
pH Scale and Its Importance

What does a lower concentration of H+ ions indicate about a solution's pH?

It results in a higher pH, making the solution less acidic.

p.13
Acids, Bases, and Salts

What are electrolytes?

Compounds that release ions when dissolved in water.

p.30
Energy: Potential and Kinetic

What does AMP stand for?

Adenosine monophosphate.

p.7
Chemical Bonding: Ionic and Covalent

What is ionic bonding?

Ionic bonding is formed by the attraction of opposite charges of a cation and an anion.

p.5
Atomic Structure and Ions

What are cations?

Atoms that have lost electrons and carry positive charges.

p.2
Energy: Potential and Kinetic

What is potential energy (PE)?

Stored energy in matters.

p.19
Types of Chemistry: Organic and Biochemistry

What are the two main types of carbohydrates?

Simple carbohydrates and complex carbohydrates.

p.19
Types of Chemistry: Organic and Biochemistry

What are simple carbohydrates commonly known as?

Sugars.

p.19
Types of Chemistry: Organic and Biochemistry

What are complex carbohydrates made of?

Long chains of sugar molecules.

p.11
Types of Chemical Reactions

What characterizes a reversible reaction?

A + B < - - - > AB.

p.26
Enzymes and Their Function

What is released during the formation of a dipeptide from amino acids?

Water (H2O).

p.30
Energy: Potential and Kinetic

What is Adenosine Triphosphate (ATP)?

A high-energy molecule derived from the nucleotide adenine.

p.10
Chemical Bonding: Ionic and Covalent

What type of bond is formed by weak attraction between hydrogen and nitrogen or oxygen?

Hydrogen bond.

p.21
Types of Chemistry: Organic and Biochemistry

What does molarity represent?

The number of solute molecules per unit volume of solution.

p.9
Chemical Bonding: Ionic and Covalent

What is a covalent bond?

A bond formed by sharing electrons between two atoms.

p.27
Enzymes and Their Function

What can easily affect or denature enzymes?

Heat, radiation, electricity, certain chemical substances, and extreme pH.

p.22
Matter and Its Properties

What happens to cells in a hypertonic solution?

Cells lose H2O and shrink.

p.12
Types of Chemical Reactions

How does the concentration of reactants influence reaction rates?

Higher concentration of reactants produces a faster reaction rate.

p.1
Matter and Its Properties

What is matter?

Anything that has weight (or mass) and takes up space; it can be solids, liquids, or gases.

p.8
Chemical Bonding: Ionic and Covalent

What is an ionic bond?

A chemical bond formed through the transfer of electrons from one atom to another.

p.8
Chemical Bonding: Ionic and Covalent

How is an ionic bond formed?

By the electrostatic attraction between positively and negatively charged ions.

p.20
Types of Chemistry: Organic and Biochemistry

What role does RNA play in the cell?

It is involved in protein synthesis and gene expression.

p.14
pH Scale and Its Importance

What is the pH range of acidic solutions?

From pH 0 to 6.9.

p.4
Atomic Structure and Ions

What does the atomic number (AN) represent?

The number of protons and electrons in an atom.

p.21
Types of Chemistry: Organic and Biochemistry

What is the substance that is dissolved in a solution called?

Solute.

p.13
Acids, Bases, and Salts

What is an example of a base releasing ions?

NaOH → Na+ + OH-.

p.15
pH Scale and Its Importance

What pH value indicates a neutral solution?

pH 7.

p.17
Types of Chemistry: Organic and Biochemistry

What is an example of an organic compound mentioned?

Cholesterol.

p.5
Atomic Structure and Ions

What are ions?

Atoms that have either lost or gained electrons.

p.22
Matter and Its Properties

What characterizes a hypotonic solution?

It has a lower osmotic pressure, causing cells to gain H2O and swell.

p.2
Energy: Potential and Kinetic

What is kinetic energy (KE)?

Working energy produced by the motion of matters.

p.16
Types of Chemistry: Organic and Biochemistry

What are organic substances?

Chemicals that contain carbon (C) and hydrogen (H), such as carbohydrates, proteins, fats, and nucleic acids.

p.28
Metabolism

What is required for dehydration synthesis to occur?

Energy input.

p.8
Chemical Bonding: Ionic and Covalent

What role do electrons play in the formation of an ionic bond?

Electrons are transferred from one atom to another, resulting in the formation of ions.

p.18
Types of Chemistry: Organic and Biochemistry

What is the significance of protein structure?

The structure of a protein determines its function and how it interacts with other molecules.

p.25
Enzymes and Their Function

What is a common feature of enzymes regarding their use?

Enzymes are usually reusable or recycled.

p.13
Acids, Bases, and Salts

What defines an acid in terms of electrolytes?

Electrolytes that release H+ ions.

p.13
Acids, Bases, and Salts

What are salts?

Substances formed by the reaction between an acid and a base.

p.15
pH Scale and Its Importance

What pH values indicate basic (alkaline) solutions?

pH values greater than 7.

p.9
Chemical Bonding: Ionic and Covalent

What is an example of a covalent bond formation?

Cl + Cl → Cl2.

p.27
Enzymes and Their Function

What is denaturation in the context of enzymes?

The process by which enzymes lose their functional shape due to external factors.

p.5
Atomic Structure and Ions

What happens to an atom when it loses electrons?

It contains more protons than electrons, becoming a cation.

p.11
Types of Chemical Reactions

What do chemical reactions involve?

The formation, breaking, or rearrangement of chemical bonds.

p.29
Enzymes and Their Function

What is required for each catabolic reaction?

A water molecule.

p.29
Enzymes and Their Function

What is released during catabolic reactions?

Energy.

p.29
Enzymes and Their Function

Provide an example of a catabolic reaction.

Triglyceride + water → fatty acids + energy.

p.23
Matter and Its Properties

What is an isotonic solution?

An isotonic solution has the same solute concentration as the inside of the red blood cells, causing no net movement of water.

p.28
Metabolism

What is produced when amino acids and energy react?

Protein and water.

p.4
Atomic Structure and Ions

How is atomic weight (AW) calculated?

By adding the number of protons and the number of neutrons.

p.30
Energy: Potential and Kinetic

What is the reaction for the breakdown of ADP?

ADP + water → AMP + PO4 + energy.

p.21
Types of Chemistry: Organic and Biochemistry

How is concentration measured?

In molarity.

p.15
pH Scale and Its Importance

What pH values indicate acidic solutions?

pH values less than 7.

p.24
Enzymes and Their Function

What is activation energy?

The energy necessary to start a reaction.

p.5
Atomic Structure and Ions

What are anions?

Atoms that have gained excessive electrons and carry negative charges.

p.5
Atomic Structure and Ions

What happens to an atom when it gains electrons?

It contains more electrons than protons, becoming an anion.

p.12
Types of Chemical Reactions

What role do catalysts play in chemical reactions?

Catalysts, whether inorganic or organic (enzymes), increase the reaction rate.

p.26
Enzymes and Their Function

What is the enzyme-substrate complex represented as?

E – S.

p.16
Types of Chemistry: Organic and Biochemistry

What are inorganic substances?

Chemicals that do not contain carbon (C) and hydrogen (H), such as table salt (NaCl), carbon dioxide (CO2), and ammonia (NH3).

p.16
Types of Chemistry: Organic and Biochemistry

What is a key difference between organic and inorganic substances?

Most organic substances are large, non-electrolytes that use covalent bonding, while most inorganic substances are small, electrolytes that usually use ionic bonding.

p.23
Matter and Its Properties

How do varying tonicities affect red blood cells?

They influence the movement of water in and out of the cells, affecting their shape and function.

p.25
Enzymes and Their Function

What is the role of cofactors in enzyme efficiency?

Many enzymes require cofactors (ions, metals) or coenzymes (organic cofactors like vitamins) to achieve optimum efficiency.

p.30
Energy: Potential and Kinetic

What does ADP stand for?

Adenosine diphosphate.

p.10
Chemical Bonding: Ionic and Covalent

How would you describe the strength of hydrogen bonds?

They are the weakest type of bonding.

p.15
pH Scale and Its Importance

What is the range of the pH scale?

0 to 14.

p.9
Chemical Bonding: Ionic and Covalent

What type of bonding is considered the strongest?

Covalent bonding.

p.22
Matter and Its Properties

What is tonicity?

The ability of a solution to change the tone or shape of cells by changing their internal H2O volume.

p.12
Types of Chemical Reactions

What effect does temperature have on the rate of chemical reactions?

Higher temperature creates greater kinetic energy, resulting in a faster reaction rate.

p.29
Enzymes and Their Function

What type of reaction is involved in catabolic metabolism?

Hydrolysis (or decomposition) reaction.

p.23
Matter and Its Properties

What is tonicity?

Tonicity refers to the concentration of solutes in a solution compared to another solution.

p.23
Matter and Its Properties

What happens to red blood cells in a hypertonic solution?

Red blood cells lose water and shrink.

p.23
Matter and Its Properties

What occurs to red blood cells in a hypotonic solution?

Red blood cells gain water and may burst.

p.18
Types of Chemistry: Organic and Biochemistry

How do proteins contribute to the immune system?

Proteins, such as antibodies, help defend the body against pathogens.

p.25
Enzymes and Their Function

What is a key characteristic of enzymes regarding their specificity?

Each enzyme is designed to bind to only one specific substance, known as the substrate.

p.30
Energy: Potential and Kinetic

What happens when the high-energy bonds in ATP are broken?

A large amount of energy is generated.

p.13
Acids, Bases, and Salts

What is an example of an acid releasing H+?

H2CO3 → H+ + HCO3-.

p.13
Acids, Bases, and Salts

What is an example of a reaction that forms a salt?

HCl + NaOH → H2O + NaCl.

p.28
Metabolism

What type of metabolism uses dehydration synthesis?

Anabolic metabolism.

p.2
Energy: Potential and Kinetic

What are the four forms of energy in the human body?

Chemical, electrical, radiant, and mechanical energy.

p.2
Energy: Potential and Kinetic

Which form of energy is the most important for driving chemical reactions?

Chemical energy.

p.28
Metabolism

What is the result of combining a monosaccharide with energy?

A polysaccharide and water.

p.26
Enzymes and Their Function

What type of bond is formed between amino acids in enzyme action?

Peptide bond.

p.25
Enzymes and Their Function

What suffix do most enzyme names end with?

Most enzymes' names end with 'ase' (e.g., DNAse, Sucrase).

p.21
Types of Chemistry: Organic and Biochemistry

What is formed when a substance is dissolved in a liquid?

A solution.

p.21
Types of Chemistry: Organic and Biochemistry

How is concentration defined?

The measure of dissolution of a particular solute in a given volume of solvent.

p.15
pH Scale and Its Importance

What does the pH scale measure?

The acidity or alkalinity of a solution.

p.20
Types of Chemistry: Organic and Biochemistry

What are the two main types of nucleic acids?

DNA (Deoxyribonucleic Acid) and RNA (Ribonucleic Acid).

p.20
Types of Chemistry: Organic and Biochemistry

What is the primary function of DNA?

To store and transmit genetic information.

p.26
Enzymes and Their Function

What are the products formed from substrates in enzyme action?

Dipeptide product (P).

p.14
pH Scale and Its Importance

What is the pH of a neutral solution?

pH 7.0.

p.30
Energy: Potential and Kinetic

How many phosphate groups does ATP contain?

Three phosphate groups (PO4).

p.21
Types of Chemistry: Organic and Biochemistry

What is the liquid in which a solute is dissolved called?

Solvent.

p.21
Acids, Bases, and Salts

What is a buffer?

A substance that can react with an acid or a base and thus resist a change in pH.

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