BB 314 Units 1-4
Guanine
Purine, matches with Cytosine
Adenine
Purine, matches with Thymine or Uracil
Thymine
Pyrimidine, matches with adenine
Protein structure: Results from covalent and non-covalent interactions between different polypeptide chains.
Quaternary
Properties of amino acids vary because of the___
R groups
Protein structure: Results from repetitive hydrogen bonds between atoms in the peptide backbone.
Secondary Structure
Protein structure: alpha helices and beta pleated sheets
Secondary structures
Protein structure: Can be altered when a protein is reversibly denatured.
Secondary, tertiary, quaternary
Characteristics of Peptide-bonded backbone of a polypeptide
-The R-groups (side chains) project out from the backbone such that they may interact with each other. -The backbone has an amino group on one end and a carboxyl group on the other end thus providing directionality. -The structure is flexible due to single bonds on either side of the peptide bonds in the backbone.
The design of the nuclear envelope is such that _____
-its outer membrane is continuous with the ER. -its perinuclear space is continuous with the ER lumen. -it is a double membrane. -the nuclear pores dispersed throughout the envelope connect the cytoplasm with the nucleoplasm. -the chromatin is able to attach to the inner envelope at discreate regions. -the inner membrane is in direct contact with the nuclear lamina. -the outer nuclear envelope have ribosomes bound to it.
Which amino acids are positively charged in an aqueous solution?
Basic
Protein structure: Results from covalent bonds between two S-containing R-groups.
Both tertiary and quaternary
Which membrane lipid does not contain a fatty acid tail?
Cholesterol
Protein structure: Results from covalent bonds formed between an amino group and a carboxyl group
Primary group
Uracil
a pyrimidine found in RNA (but not DNA); pairs with DNA adenine
Protein structure: Results from non-covalent interactions between the R-groups.
both tertiary and quaternary
A region of a protein that forms a functional component of a protein is called a
domain
Protein structure: Is also known as the protein sequence.
primary
Cytosine
pyrimidine, matches with cytosine
Protein structure: Results from covalent and non-covalent interactions between R-groups within one polypeptide chain.
tertiary