Q1 – Week 10 – 19-20
week 10
Week of 11/5- 11/9
11/5 – Monday – period 7,8 – LAB DAY!!!!!
1. Review origin of life presentation through Amino acids
2. Amino Acid Structure – using electron dot diagrams
3. Polar vs. Non- polar molecules-
a) Polar molecular atractions – (H – bonds) – HYDROPHILIC
b) Nonpolar attractions – (LDF’s) – HYDROPHOBIC
Demo –
1. – electrostatic streams of water
2. Like dissolves like – intermolecular attractions.
a) Sweat and sharpie –
b) acetone and Polystyrene
c) starch and water.
d) Demonstrated the 2 bottles with 2 types of dyes.
LAB –
1: Protein Activity – linking the amino acids in peptide bonds
11/5 – Monday Homework:
HW: Please follow the order below!
(complete last nights form if you did not for some reason!!!)
1: Watch the disulphide video.
This represents the a covalent bond between R groups that have a S (sulfur). This is the final type of way that proteins (R groups) can attach to themselves and fold into their “active” shape.
2: Watch the protein folding video.
*Notice the primary structure, secondary, tertiary, and quaternary structure that proteins can have by attracting themselves by R groups attracting or bonding(cysteine – disulphide bonds) with other R groups.
* 3 ways that amino acids can attract each other:
A) polar attractions (H – bonds)
B) Nonpolar attractions (LDF’s)
C) Ionic attractions (some R groups have charges and thus a negative charge R group from one amino
acid will attract positive charged R groups from another amino acids.)
3: Complete the protein packet and review with the key – do your best here and I will review. I do have video below that reviews parts of the packet.
Video 1:
Video 2:
Optional video on Mr. Grodski reviewing a little bit of the packet.
Optional video of Extra help session explaining H-Bonding:
11/6 – Tuesday – period 7 – Academic Study Hall
– period 8
1. Brine Shrimp Lab Re-writing
“Like dissolves Like” because the intermolecular attractions between molecules are similar.
Hydrophilic (water loving) molecules prefer to ATTRACT molecules that are also like water.
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Water has strong INTER molecular attractions because it is polar. The electron rich oxygen end is negative and the electron deficient end of hydrogen is positive. Water will orientate itself correctly liquid or in the solid phase so that positives (H end) attract the negatives (oxygen).
These are not Bonds!! Bonds are intramolecular forces that are determined by valence electrons filling their outermost energy level. The only molecules that can GET into water must also have positive and negative ends to dissolve in water!
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Water is polar and thus has positive and negative (poles). Other molecules that are polar will also have positive and negative poles that water can attract to and mix into water.
polar glucose ( C6H12O6) molecule glucose dissolved in water
The diagram is illustrating the Hydrogen Bonding between the polar water and polar glucose molecules. H – Bonding, is NOT a bond but an attractive force between polar molecules that have electron deficient hydrogens.
*Notice that the oxygen end of the water molecule is Attracted to the positive end of the Hydrogen that is BONDED to an atom that that has a large attraction for electrons. The Hydrogen must be electron deficient in order for it to be positive. THAT means that is must be bonded to either F,O, or N to create this electron deficient hydrogen.
These three element pull the shared electrons (electrons in the bond) AWAY from the hydrogen ENOUGH to make the Hydrogen positive enough so that it can ATTRACT to electron rich (negative end) of another polar molecule.
The reason elements F,O, or N create electron deficient Hydrogens is because they have the greatest electronegativity (attractions for electrons). Here is a list of electronegativity values for some of the elements of the periodic table.
Hmm. Does this trend follow the atomic radii trend that we looked at last week?? YES!
Notice which elements have the greatest attraction for electrons (electronegativity). F , O, and N!
Also Notice that Hydrogen (2.20) and Carbon (2.55) have electron configurations differences less than .40 and generally any difference in electronegativity less than .40 between 2 elements in a sharing bond (covalent) is considered “equal sharing’ and thus will not create electron rich or electron deficient areas of a molecule. THIS MEANS THAT HYDROGENS THAT ARE BONDED TO CARBON ARE NOT ELECTRON DEFICIENT AND WILL NOT H-BOND!
Molecules that are not polar do not have Electron deficient Hydrogen and thus MUST attract each other by another method – LDF’s or non-polar attractions.
Using the H-Bonding – Organic Molecule worksheet : Classwork
1: Polar molecular atractions – (H – bonds) – HYDROPHILIC
2: Nonpolar attractions – (LDF’s) – HYDROPHOBIC
Demo – Oil and water stream electrostatic demo
3: Protein Lab Activity –
A) complete primary protein structure with R groups
B) Label the amino acid using abbreviation from worksheet.
C) Highlight the hydrophobic R groups.
period 7/8-
Today’s Demo:
11/6 – Tuesday
Homework:
1. Please complete the Amino Acids worksheet 1718-New.pdf worksheet and follow along with me using the video below.
2. Read the notes above, and using the information from the video that helped you with the Amino Acids worksheet 1718-New.pdf and the reading from the link below, complete the form.
Video:
Todays Form:
11/7 – Wednesday – period 7,8 – LAB DAY!!!!!
1: Protein Lab Activity –
A) complete primary protein structure with R groups
B) Label the amino acid using abbreviation from worksheet.
C) Highlight the hydrophobic R groups.
D) Fold your proteins!
11/7 – Wednesday Homework:
1. Complete the second submission of last night form
2. Study for Test
11/8 – Thursday-
period 7 – Academic Study Hall
– period 8
1. Fold Proteins
2. Test 2 Begins – Vocab 1st
11/8 – Thursday-Homework –
1. STUDY for the rest of the test. You will see Hardy-Weinberg, Chi- squared etc….
2. Complete your Brine Shrimp LAB!!!
I have finished reviewing your Formal Brine Shrimp Labs! Your final draft is due SATURDAY at 11:59 pm and the labs will be locked for grading from that point on.
11/9 – Friday – period 6/7 –
Test 2 completion.
11/9 – Friday – Homework:
1. Complete your Brine Shrimp LAB!!!
I have finished reviewing your Formal Brine Shrimp Labs! Your final draft is due SATURDAY at 11:59 pm and the labs will be locked for grading from that point on.
End of week 10 and quarter 1!