Chapter 3 Flashcards
What is matter?
Anything that takes up space and has mass.
What is an element?
A pure substance that cannot be broken down into other types of substances. Each element is made up of one type of atom.
What is nuclear force?
The force that attracts protons and neutrons to eachother.
What is a compound made of?
Two or more elements combined in fixed proportions.
What is the smallest particle of most compounds in living things?
A molecule.
What is a chemical bond?
Something (a force) that holds together the atoms of molecules.
How is a chemical bond formed?
When atoms share or transfer valence electrons.
Why do atoms form bonds?
They want to have a full outer energy level because it is the most stable possible arrangement of electrons.
What is a polar Covalent bond?
A covalent bond is the force of attraction that holds together two nonmetal atoms that share a pair of electrons. One electron is provided by each atom, and the pair of electrons is attracted to the positive nuclei of both atoms.
What is a hydrogen bond?
An intermolecular attractive force in which a hydrogen atom that is covalently bonded to a small, highlyelectronegativeatom is attracted to a lone pair of electrons on an atom in a neighboring molecule.
What are the types of chemical bonding?
polarcovalent , hydrogen , non-polar covalent, and ionic bonding
What is an ionic bond?
an atom GIVES AWAY one or more electrons to another atom.
What is a covalent bond (simple answer)?
Two atoms share one or more electrons.
What is a hydrogen bond?
a relatively weak bond between two oppositely charged sides of two or more molecules. Water is a polar molecule.
What is a biochemical compound?
Sound it out.
Bio-life
chemical compound.
They are chemical compounds found in living things.
What is the base for all biochemical compounds?
Carbon!
Why is carbon essential for life?
Because it can form so many bonds, even with itself!!
What is a polymer?
Something built of monomers.
Momomers are basic units, like beads on a string.
What are the 4 classes of biochemical compounds?
Lipids, proteins, and nucleic acids, and carbohydrates.
Nucleic Acids?
Include DNA and RNA molecules. They also contain carbon, hydrogen, nitrogen, and phosphorous.
Carbohydrates include sugars and starches. What do they provide cells with?
Energy. They also store energy, and make up organic structures like plant cell-walls.
Proteins include what?
Enzymes, antibodies, and numerous other compounds.
They help cells keep shape, make up muscle, speed up chem-reactions, and carry materials and messages.
What is the most abundant biochemical compound found in Earth’s living things?
Cellulose
What is the most common class of biochemical compounds?
Carbohydrates
Sugars are a general name for sweet, short-chain, soluble carbohydrates, which are found in many foods. Their main function in living things is to provide ____.
Energy.
Sugars include ____, ____, and ____.
glucose
fructose
galactose
glucose + fructose =?
sucrose
What is a disaccharide?
A carbohydrate formed by the joining of two monosaccharides.
What is another name for polysaccharides?
Complex carbohydrates
What are the 2 common functions of complex carbohydrates in living things?
Storing energy and making up structures of living things.
What is starch?
A complex carbohydrate that is made by plants to store energy.
Animals dont store energy in starch but in ___.
Glycogen, a complex carbohydrate.
What is cellulose?
A polysaccharide chain of several hundred to many thousands of linked glucose units.
Da heck is Chitin?
a long-chain polymer of a derivative of glucose.
Dietary fiber is found in what kinds of food?
plant-based foods, fruits, veggies, whole grains, and legumes.