Quiz 1

Which of the following are involved in forming the tertiary structure of proteins? 1. H bonds 2. Hydrophobic interactions 3. ionic bonds

1. H bonds

Ture of False: Mutation in the DNA will ONLY affect primary structure of the protein but never tertiary

FALSE

Regions of proteins, which have functional activity that can be predicted from their conserved primary sequences as a result of evolution, are called what?

Motifs

Which part of the amino acids makes it unique from all others?

Side Chain

Intergral membrane proteins are those that...

are directly associated with the membrane lipids

Whereas small uncharged molecules can diffuse though the hydrophobic core of a phospholipid bilayer, a larger polar substance such as glucose must enter cells by...

binding to carrier proteins that facilitate the passage of specific molecules across membranes

A difulfide bond is formed between ______ residues

cysteine

In the fluid mosaic model of biological membrane structure, transmembrane proteins are...

embedded nearly randomly in the lipid bilayer

Water is an ideal solvent in cells because it...

is a polar molecule that can form hydrogen bonds with itself and with other polar molecules

The most common molecules in cellular membranes are the ...

phospholipids

Proteins must have more than one ______ to have a quarternary structure.

polypeptide chain

The interaction of the alpha and beta subunits to form the hemoglobin molecule is an example of ______ structure.

quarternary

The alpha helix is an example of which level of protein structure?

secondary

The linear order of amino acids in a protein determines its

structure

Proteins can be described as which of the following?

they carry out the program encoded by genes