exam 1 sample questions Flashcards
gene
amino acid sequence of polypeptides by unit of inhertitance
central dogma
information flows from DNA to RNA to make fucntional product protein
review functional group study deck!
ok
a disulfide brudge often satbilizes the ______ structure of a polypeptide
tertiary
nucelotides in RNA are joined by _________ bonds
phosphodiester
How is Adenine bonded to Thymine and Guanine to Cytosine in the DNA double helix
Cytosine forms three hydrogen bonds with guanine, and adenine forms two hydrogen bonds with thymine. These hydrogen-bonded nitrogenous bases are often referred to as base pairs.
what are the three components of a nucleotide? How do nucleotides differ between RNA and DNA?
In RNA A goes to uracil while in DNA A goes to thymine. The three components of a nucleotide are a base, sugar, and phosphate group.
A goes to (for DNA)
T (thymine)
C goes to (for DNA)
G
A goes to (for mRNA)
U (uracil)
what bonds are likely to stabilize the joining of Type I and II polypeptides into a coiled-coil structure?
The bonds that are likely to stabilize the joining of Type 1 and II polypeptides into a coiled coil structure are polypeptide bonds and hydrogen bonds.
What is the bond that stabilizes secondary structure?
The bond that stabilizes the secondary structure is a hydrogen bond.
If TPI is composed of 1 polypeptide, what is the highest level of protein structure it demonstrates? (have q’s pulled up to look at image)
The highest level of protein structure is secondary.
frameshift mutation
a genetic mutation caused by a deletion or insertion in a DNA sequence that shifts the way the sequence is read
nonesense mutation
a change in DNA that causes a protein to terminate or end its translation earlier than expected
