Biochemistry Flashcards
Substances that ionize in water
Acids, bases, salts
Proton acceptor
Base
Ionize in water to release hydrogen ions and a negative ion other than hydroxide
Acid
Ionize in water to release ions other than H+ and OH-
Salt
Formed when an acid and a base are combined
Salt
Substances such as lemon juice and vinegar
Acid
Prevents rapid/large swings in pH
Buffer
The ability of water to maintain a relatively constant temperature and thus prevent sudden changes is because of its high _____?
Heat capacity
Biochemical reactions in the body must occur in _____?
Water
About ______% of the volume of a living cell is water.
70%
Water molecules are bonded to other water molecules because of the presence of ______ bonds
Hydrogen
Water, as H+ and OH- ions, is essential in biochemical reactions such as ______ and _____ reactions
Hydrolysis and Dehydration
Because of its _______, water is excellent solvent
Polarity
Forms the basis of mucus and other body _______
Lubricant
Ionize completely in water (weak or strong acid)
Strong acid
Ionize incompletely in water (weak or strong acid)
Weak acid
Act as part of a buffer system (weak or strong acid)
Weak acid
When placed in water, always act to change the pH (weak or strong acid)
Strong acid
Ionize at high pH (weak or strong acid)
Strong acid
Ionize at low pH (weak or strong acid)
Weak and strong acid
Ionize at pH 7
Strong acid
Organic compounds
Fats, proteins, glucose, and DNA
Inorganic compounds
Carbon dioxide, Oxygen, KCl, and H2O
Building blocks of carbohydrates
Monosaccharides
Building blocks of Fat
Fatty acids and glycerol
Building blocks of protein
Amino acids
Building blocks of Nucleic Acids
Nucleotides
Cellular cytoplasm is primarily composed of this substance
Proteins
The single most important fuel source for body cells
Monosaccharides
Not soluble in water
Lipids
Contain C, H, and O in the ratio CH20
Monosaccharides
Contain C, H, and O, but have relatively small amounts of oxygen
Lipids
_______ these building blocks contain N in addition to C, H, and O
Nucleotides, Amino Acids
Contain P in addition to C, H, O, and N
Nucleotides
Used to insulate the body and found in all cell membranes
Lipids
Primarily components of meat and cheese
Proteins
Primarily components of bread and lollipops
Carbohydrates
Primarily components of egg yolk and peanut oil
Lipids
Include collagen and hemoglobin
Proteins
Class that usually includes cholesterol
Lipids
Examples of fibrous proteins
Collagen and keratin
Examples of globular proteins
Hormones, enzymes, and hemoglobin
Biologic catalyst
 enzyme
Plant storage carbohydrate
Starch
Animal storage carbohydrate
Glycogen
The stuff of the genes
DNA
 A steroid
Cholesterol
Double sugars, or disaccharides
Lactose and maltose
Phospholipids are ______ molecules
 polarized
_______ are the major form in which body fat is stored
Neutral fats
_______ is the most abundant compound in the body
Water
_______ molecules are generally soluble in water
 polar
The bases of RNA are A, G, C, and _____
 U
Universal energy currency of living cells is _______
ATP
RNA is ______ stranded
Single
The four elements compromising over 90% of living matter are C, H, N, and _____
O
Is starch is the polymer, the monomer is
Glucose
During polymer digestion, water as H+ and OH- ions would
Enter between monomers, bond to them, and keep them separated
Another name for the chemical digestion of polymers is
Hydrolysis
If the monomers are amino acids, they may differ from each other by their ____
R group