bio 12
Biology 12 Introduction to Biochemistry Study Guide Kiki Dhaliwal Period: 7 September. 19/2013
10. Atom: Smallest particle of an element that displays the properties of that element.
11. See page
12. a) Ionic bonds are chemical bonds in which ions are attracted to each other by opposite charges.
b) Covalent bonds are chemical bonds in which atoms share one pair of electrons.
c) Hydrogen bonds are weak that aries between a slightly positive hydrogen atom of one molecule and a slightly negative atom of another molecule or between two parts of the same molecule.
13.
Because water is a bent and partially polar molecule, it has these biologically important characteristics of what is formed when joining many water molecules. All of them are critical to the creation and support of life on Earth:
Polarity
Hydrogen bonding
Cohesion
Surface tension
14. The polarity of water allows two important things to happen
Water is polar, has an unequal distribution of charge. This means that water molecules are slightly positive and negative. This quality is important because that makes water a good solvent. Other polar compounds and ions can easily be dissolved in water because polar + polar = even distribution of charge, and ions have a charge, so it's attracted to the opposite charge on the water molecule.
The polarity of water is important in repelling nonpolar compounds. Nonpolar compounds don't dissolve well in water. Important to cell membranes in the body. The shape and function of cell membranes depend on the interaction of polar water with nonpolar membrane molecules.
15.
16. Acid: A chemical a corrosive or sour-tasting liquid substance, that neutralizes alkalis, dissolves some metals, and turns litmus red.
Examples:
citric acid vinegar Anything with a pH less than 7 = Acid
17. Base: A base is a material that can take in hydrogen ions and
10. Atom: Smallest particle of an element that displays the properties of that element.
11. See page
12. a) Ionic bonds are chemical bonds in which ions are attracted to each other by opposite charges.
b) Covalent bonds are chemical bonds in which atoms share one pair of electrons.
c) Hydrogen bonds are weak that aries between a slightly positive hydrogen atom of one molecule and a slightly negative atom of another molecule or between two parts of the same molecule.
13.
Because water is a bent and partially polar molecule, it has these biologically important characteristics of what is formed when joining many water molecules. All of them are critical to the creation and support of life on Earth:
Polarity
Hydrogen bonding
Cohesion
Surface tension
14. The polarity of water allows two important things to happen
Water is polar, has an unequal distribution of charge. This means that water molecules are slightly positive and negative. This quality is important because that makes water a good solvent. Other polar compounds and ions can easily be dissolved in water because polar + polar = even distribution of charge, and ions have a charge, so it's attracted to the opposite charge on the water molecule.
The polarity of water is important in repelling nonpolar compounds. Nonpolar compounds don't dissolve well in water. Important to cell membranes in the body. The shape and function of cell membranes depend on the interaction of polar water with nonpolar membrane molecules.
15.
16. Acid: A chemical a corrosive or sour-tasting liquid substance, that neutralizes alkalis, dissolves some metals, and turns litmus red.
Examples:
citric acid vinegar Anything with a pH less than 7 = Acid
17. Base: A base is a material that can take in hydrogen ions and