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Questions and Answers
What is the primary focus of biochemistry in relation to living organisms?
What is the primary focus of biochemistry in relation to living organisms?
Which statement best describes the biochemistry of cells?
Which statement best describes the biochemistry of cells?
How do chemical processes relate to living organisms in the context of biochemistry?
How do chemical processes relate to living organisms in the context of biochemistry?
Which of the following is NOT a component of biochemistry as it relates to cells?
Which of the following is NOT a component of biochemistry as it relates to cells?
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Which of the following inorganic ions is NOT typically found in cell mass?
Which of the following inorganic ions is NOT typically found in cell mass?
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What is the primary role of inorganic ions in cellular functions?
What is the primary role of inorganic ions in cellular functions?
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What does the study of biochemistry imply regarding living organisms?
What does the study of biochemistry imply regarding living organisms?
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Which of the listed inorganic ions is positively charged?
Which of the listed inorganic ions is positively charged?
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How much of the cell mass do inorganic ions generally constitute?
How much of the cell mass do inorganic ions generally constitute?
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Which inorganic ion is specifically mentioned as playing a role in kidney function?
Which inorganic ion is specifically mentioned as playing a role in kidney function?
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What primarily composes the majority of a cell's structure?
What primarily composes the majority of a cell's structure?
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What is organic chemistry primarily concerned with?
What is organic chemistry primarily concerned with?
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Which of the following statements best explains the importance of carbon?
Which of the following statements best explains the importance of carbon?
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Which of the following categories of molecules does not primarily consist of carbon-based compounds?
Which of the following categories of molecules does not primarily consist of carbon-based compounds?
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Why is the study of carbon compounds considered a foundational aspect of biological sciences?
Why is the study of carbon compounds considered a foundational aspect of biological sciences?
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How many electrons does carbon have in its second orbit?
How many electrons does carbon have in its second orbit?
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What is the maximum number of covalent bonds that carbon can form?
What is the maximum number of covalent bonds that carbon can form?
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Which of the following statements about carbon is true?
Which of the following statements about carbon is true?
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In terms of electron sharing, how does carbon's structure impact its ability to bond?
In terms of electron sharing, how does carbon's structure impact its ability to bond?
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Which characteristic of carbon is essential for its role in organic molecules?
Which characteristic of carbon is essential for its role in organic molecules?
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Which of the following represents the basic formula of monosaccharides?
Which of the following represents the basic formula of monosaccharides?
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What is the primary type of sugar found in sports drinks?
What is the primary type of sugar found in sports drinks?
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Which monosaccharide is known as 'milk sugar'?
Which monosaccharide is known as 'milk sugar'?
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Which of the following statements is correct regarding glucose, fructose, and galactose?
Which of the following statements is correct regarding glucose, fructose, and galactose?
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Where is fructose predominantly found?
Where is fructose predominantly found?
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Which statement accurately describes polysaccharides?
Which statement accurately describes polysaccharides?
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What is the basic structure of polysaccharides?
What is the basic structure of polysaccharides?
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Which of the following is a characteristic of polysaccharides?
Which of the following is a characteristic of polysaccharides?
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What distinguishes polysaccharides from monosaccharides and oligosaccharides?
What distinguishes polysaccharides from monosaccharides and oligosaccharides?
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How are polysaccharides classified in relation to their structure?
How are polysaccharides classified in relation to their structure?
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Flashcards
Biochemistry of cells
Biochemistry of cells
The study of chemical processes inside and between biological cells.
Biochemistry
Biochemistry
The science of chemical processes in living things.
Living organisms
Living organisms
Anything that is alive.
Biological cell
Biological cell
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Chemical processes
Chemical processes
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Inorganic Ions
Inorganic Ions
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Sodium (Na+)
Sodium (Na+)
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Potassium (K+)
Potassium (K+)
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Calcium (Ca2+)
Calcium (Ca2+)
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Phosphate (HPO42-)
Phosphate (HPO42-)
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Organic molecules
Organic molecules
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Organic chemistry
Organic chemistry
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Why is carbon important in organic chemistry?
Why is carbon important in organic chemistry?
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Carbon's bonding ability
Carbon's bonding ability
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Importance of organic molecules in cells
Importance of organic molecules in cells
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Carbon's Valence Electrons
Carbon's Valence Electrons
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Covalent Bond
Covalent Bond
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What makes Carbon special?
What makes Carbon special?
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Carbon's Bonding Power
Carbon's Bonding Power
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Why is Carbon so important?
Why is Carbon so important?
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Monosaccharides
Monosaccharides
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Basic Monosaccharide Formula
Basic Monosaccharide Formula
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Glucose
Glucose
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Fructose
Fructose
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Galactose
Galactose
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Polysaccharide
Polysaccharide
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Polymer
Polymer
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What are some examples of polysaccharides?
What are some examples of polysaccharides?
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How are polysaccharides formed?
How are polysaccharides formed?
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Study Notes
Biochemistry of Cells
- Biochemistry is the study of chemical processes within and relating to living organisms
- Living organisms consist of cells
- Biochemistry of cells involves studying processes within individual cells and interactions between cells
Cell Composition
- Cells are composed of:
- Water
- Inorganic ions
- Organic molecules (carbon-based)
Water (Biochemistry of Cells)
- Water is the most abundant molecule in cells, constituting 70% or more of total mass
- The amount of water can vary in different cell types
- Water is called the "universal solvent" due to interactions with other cell constituents
- Water is essential for most bodily reactions
Inorganic Ions (Biochemistry of Cells)
- Inorganic ions make up 1% or less of the cell's mass
- Important inorganic ions include:
- Sodium (Na+)
- Potassium (K+)
- Magnesium (Mg2+)
- Calcium (Ca2+)
- Phosphate (HPO42-)
- Chloride (Cl-)
- Bicarbonate (HCO3-)
- These ions play critical roles in cell metabolism and function
Organic Molecules (Biochemistry of Cells)
- Organic molecules, mostly carbon-based molecules, form the rest of the cell
- The study of carbon compounds is called organic chemistry
- Organic molecules are crucial for cell structure and function
Carbon's Importance
- Carbon has four electrons in its outer shell, allowing it to form up to four covalent bonds with other atoms
- This versatility enables carbon to create diverse and complex molecules, essential for life
Types of Carbon-Based Molecules
- Four main types of carbon-based molecules in living things are:
- Carbohydrates
- Lipids
- Proteins
- Nucleic Acids
Polymers
- Some macromolecules are called polymers, built from smaller molecules called monomers
Carbohydrates
- Carbohydrates are simple sugars
- Monosaccharides:
- Glucose, fructose, galactose
- The formula for monosaccharides is (CH2O)n
- Glucose is found in sports drinks
- Fructose is found in fruits
- Honey contains glucose and fructose
- Galactose is called "milk sugar"
- Monosaccharides form ring structures in aqueous solutions
- Glucose is a primary source of energy for cells
- Disaccharides:
- Sucrose (table sugar)
- Lactose (milk sugar)
- Maltose (grain sugar)
- Disaccharides are formed from joining two monosaccharides through a dehydration reaction
- Polysaccharides:
- Starch (glucose monomers)
- Plants store starch
- Potatoes and grains are sources of starch
- Cellulose (glucose monomers)
- Humans cannot digest cellulose
- Cellulose is a major component of plant cell walls
- Glycogen (glucose monomers)
- Animals store glycogen
- Starch (glucose monomers)
- Isomers have the same chemical formula but different structural formulas
Lipids
- Lipids are insoluble in water but soluble in alcohol
- Lipids have four major functions in cells:
- Storing energy
- Insulating the body
- Cushioning and protecting organs
- Forming components of cell membranes
- Types of Lipids:
- Fats
- Waxes
- Steroids
- Oils
- Triglycerides are composed of glycerol and three fatty acid chains
- Glycerol forms the backbone of the fat
- Phospholipids are the main components of cell membranes
- Steroids have a carbon skeleton bent into four fused rings
- Cholesterol is a base steroid from which other steroids are derived
- Estrogen and testosterone are examples of steroids
Proteins
- Proteins are polymers made of amino acids
- Proteins are used for building cells, acting as hormones, and doing much of the cell's work
- Many proteins act as catalysts (enzymes)
- Enzymes control the rate of chemical reactions
- Proteins consist of four types:
- Structural
- Transport
- Contractile
- Storage
- Proteins are composed of 20 different amino acids
- Amino acids are linked together, forming polypeptide chains
- Oligopeptides are composed of 2-10 amino acids
- Dipeptides contain 2 amino acids
- Tripeptides contain 3 amino acids
- Polypeptides include more than 10 amino acids, forming proteins
- Proteins have primary, secondary, tertiary, and quaternary structures
- The primary structure is the sequence of amino acids
- The secondary structure involves coiling and folding
- Tertiary structure is the result of interactions between side chains
- Quaternary structure is the overall structure of multiple polypeptide chains bonding together
Nucleic Acids
- Nucleic acids store hereditary information
- Nucleic acids contain instructions for making proteins
- Two types of nucleic acids exist:
- DNA (deoxyribonucleic acid)
- RNA (ribonucleic acid)
- DNA is located in the nucleus of eukaryotic cells
- Nucleic acids are polymers of nucleotides
- Nucleotides have three parts: a phosphate group, a sugar, and a base
- DNA and RNA are linked by phosphodiester bonds
- DNA bases: Adenine (A), Guanine (G), Thymine (T), Cytosine (C)
- RNA bases: Adenine (A), Guanine (G), Uracil (U), Cytosine (C)
- DNA forms a double helix, RNA forms a single helix
- Differences between DNA and RNA:
- The sugar (deoxyribose in DNA, ribose in RNA)
- The bases (thymine in DNA, uracil in RNA)
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