BIOSC 0150 Study Guide - Final Guide: Glucosamine, Amphiphile, Symporter

105 views8 pages

harlequinzebra30

21 Dec 2017

School

Department

Course

Professor

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

Document Summary

Ch 2: hydrophobic interaction: interaction of nonpolar substances in the presence of polar. Ionic attraction attraction of opposite charges substances: van der waals interaction: interaction of electrons of nonpolar substances, nonpolar covalent bonds: two atoms close to one another in electronegativity, share electrons equally. Ch 3: proteins: formed of combo of 20 amino acids, functional groups, hydroxyl: polar. Forms hydrogen bonds w/ water to help dissolve. Linkage to other molecules by condensation: aldehyde: polar. Build molecules and energy releasing reactions: keto: polar. Accepts h for nh3+. condensation reactions: phosphate: charged, acidic. When bonded to another phosphate hydrolysis releases much energy: sulfhydryl: -sh. By giving up h, two -sh groups can react to form a disulfide bridge, thus stabilizing protein structure: methyl: ch3. Important in interacting w/ other nonpolar molecules and energy transfer. If on the same side double bond is cis. Opposite sides trans: optical isomers: carbon atom has four different atoms or groups attached.

Related Questions

The type of macromolecule found in highest concentration on a weight basis in a HeLa cell is

protein.

lipid.

polysaccharide.

nucleic acid.

water

Co and Zn ions are required by humans in

microgram amounts.

gram or near gram amounts.

kilogram amounts.

d. milligram amounts.

Which description best characterizes the length of a hydrogen bond between water molecules?

About the same length as the calculated van der Waals distance for two water molecules.

About the same length as a covalent O----H bond.

Shorter than a covalent O---H bond.

Longer than a covalent O---H bond, but shorter than the calculated van der Waals distance between water molecules.

Which of the following statements about water is not true?

Water will hydrogen bond into highly ordered structures or "cages" around non-polar molecules.

The electron-rich oxygen atom of one water molecule can interact with an electron-poor hydrogen on another water molecule to form a hydrogen bond.

Water is a key player in the energetics of the hydrophobic effect.

In an ice crystal water molecules pack into open lattices consisting of five-membered oxygen rings.

At 25 degrees celsius liquid water is about 85% as hydrogen bonded as the water in ice, with each molecule in an average of 3.4 hydrogen bonds.

Which of the following is the strongest?

Ionic interactions

Permanent dipole - permanent dipole interactions

London dispersion forces

Co-linear hydrogen bonds

Which of the following is the best explanation for the hydrophobic effect?

It is caused by the attraction of hydrophobic groups for each other.

It is an entropic effect caused by the tendency of hydrophobic groups to increase their entropy by associating with other hydrophobic groups.

It is an entropic effect, caused by the tendency of water molecules to increase their entropy by excluding hydrophobic groups, which they must otherwise surround with highly ordered structures.

It is caused by the attraction of water for hydrophobic groups.

It is an entropic effect, caused by the tendency of water molecules to increase their entropy by forming highly ordered structures around the hydrophobic groups.

Which of the following is NOT defined as a buffer? (pKa PIPES-H⁺ = 6.76; pKa MOPS-H⁺ = 7.15; pKa HEPES-H⁺ = 7.47)

0.15 M MOPS, pH 6.50

0.05 M HEPES-H⁺ / 0.04 M HEPES

0.20 M PIPES, pH 7.97

0.01 M HEPES, pH 7.30

BIOSC 0150 Study Guide - Final Guide: Glucosamine, Amphiphile, Symporter

Document Summary

Get access

Related Documents

BIOSC 0150 Lecture Notes - Lecture 3: Hydrogen Bond, Biomolecule, Hydrophile

BIOSC 0150 Lecture Notes - Lecture 1: Chemical Polarity, Beer Engine, Electron Shell

BIOSC 0150 Lecture Notes - Lecture 7: Disulfide, Hydrogen Disulfide, Tata Box

Related Questions