BIOB10Y3 Lecture : Lecture 2

78 views5 pages

blackwildebeest308

13 Feb 2012

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

2. non-polar molecule: equal sharing of electrons, atoms are of similar size, so they share the electrons equally (ex. molecule that consists of c & h), they are not soluble in water because they are not polar, hydrocarbons. 3. ionized molecule: when an atom is so electronegative that it can capture electrons from another ataom (gains becomes anion, and loses becomes cation) Non-covalent bonds (govern interaction between molecules or different parts of a larger biological molecule (typically weaker)): 4. ionic bond: atoms or molecules with pos or neg charges that attract each other (dna is very negative, dna binding proteins are very positive and both will bind together) Molecules organize into macromolecules: they are built around carbons, hydrocarbons: contains only hydrogen and carbon atoms (from carbonrare, functional groups gives reactivity to the macromolecules, ester bond are important for bonding lipids together. Importance of functional groups: a lot of them are capable of ionization (can be pos or neg)

Related Questions

Fill in the following chart with the appropriate subatomic particle and state whether each is located in the nucleus of the orbital

Particle	Charge	Location (Nucleus or Orbital)
	Positive (+)
	Negative (-)
	Neutral Charge

Fill in the following chart using the lowercase letter of the statements below. Please be aware that some letters should be used more than once because they are true for more than one type of bond.

Covalent Bonds	Ionic Bonds	Hydrogen Bonds

Electrons are transferred from one atom to another atom

Valance electrons are shared between atoms

Involves positive and negative ions

A weak bond between 2 or more polar molecules

A bond between 2 or more atoms

The type of bond used to make NaCl (table salt)

The type of bond used to make CH₄ (Methane)

What does it mean when a molecule is described as âpolar?â Be detailed in your answer.

State and explain two reasons that water molecules are essential to life because of their hydrogen bonds.

Fill in the chart with the missing information about macromolecules

Macromolecule	Dietary source	Function	Example	Defining Characteristics
Carbohydrate			Cellulose and glucose
Lipid	Fats, Oils
Protein
Nucleic Acid	Sardines, beans, spinach			Made of nucleotides (contain a base, sugar and phosphate)

greydinosaur410

Water molecules have one oxygen atom that is moreelectronegative than the two hydrogen atoms bound to it. As aresult, which type of bonding holds the atoms within one watermolecule together?

A. non-polar covalent bonding

B. polar covalent bonding

C. Ionic bonding

D. hydrogen bonds