CHEM 3310 Midterm: Exam 1 Review

193 views8 pages
6 Feb 2017
Department
Course
Professor

For unlimited access to Study Guides, a Grade+ subscription is required.

Biochem Exam 1 Review
I. Chapter 1
a. Carbohydrates
i. Glycosidic bond (ether bond) formed by dehydration reaction
ii. Starch: edible, alpha glycosidic bond
iii. Cellulose: inedible, beta glycosidic bonds (beta bad!)
b. Know basic functions
c. Know basic cell organelle functions
i. Protein synthesis occurs in Rough ER by ribosomes
d. Structure equals function!
II. Chapter 2
a. Water
i. Boiling point typically increases with weight, water is exception due to H-bonding
ii. Has high surface tension, adhesion and cohesion
iii. Weakens electrostatic interactions
iv. Assists biochemical interactions
v. Bond angle of 104.5°
vi. Ionization constant:
1. Kw = 1x10-14 = [H3O+][OH-]
b. Brownian motion: random movement of fluids and gases, powered by background thermal noise
i. Most common medium is water
c. Weak interactions are important for biological reactions
i. i.e. signaling by hormones, enzyme reactions, holding DNA together
ii. together, many Van der Waals interactions can be strong
d. DNA
i. Adenine and Thymine bond together with 2 H-bonds
ii. Guanine and Cytosine bond together with 3 H-bonds
iii. A and G have 2 rings
iv. C and T have 1 ring
v.
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 8 pages and 3 million more documents.

Already have an account? Log in
e. Hydrophobic Effect
i. Exclusion of nonpolar molecules from the water phase
ii. Inability of nonpolar molecules and hydrophobic molecules to sequester themselves away
from polar water molecules
iii. Entropy driven
iv. No energy required, occurs spontaneously
v. Powers protein folding, creates membranes
f. Henderson-Hasselbalch equation
i. pH = pKA log [HA]/[A-]
ii. pH=pKA+log[A-]/[HA]
iii. pKA = -log KA and pH = -log [H+]
1. pKA is when there’s exactly half conj. base and conj. acid
III. Chapter 3
a. Standard AA backbone:
i. Attached to alpha C: carboxylic acid, amino group, alpha H and R group
ii. N, C α, CO
iii. Zwitter ions at physiological pH
iv. pKa of carboxy group in backbone is 3, amine group is 9
1. other pKa values will be given on exam
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 8 pages and 3 million more documents.

Already have an account? Log in
*his lecture slides and the book have histidine as a polar amino acid. It can be basic (positive) and is hydrophilic
v. isoelectric point= pI = pH value at which zwitter ion has net zero charge
b. Essential Amino Acids
i. Histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan,
valine
ii. The Whole Food Ladder Really Must Have Various Key Ingredients
c. Oxidation-reduction reactions
i. LEO goes GER
ii. OIL RIG
iii. Cell are reducing environments
IV. Chapter 4
a. Protein Structure
i. Primary structure: sequence of AA’s
ii. Secondary structure: localized conformation of polypeptide backbone
1. α helices
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 8 pages and 3 million more documents.

Already have an account? Log in

Get access

Grade+
$10 USD/m
Billed $120 USD annually
Homework Help
Class Notes
Textbook Notes
40 Verified Answers
Study Guides
1 Booster Class