exam 2 Flashcards
The genetic code for the conversion of mRNA codons to proteins has redundancy.
True
For DNA Polymerase III to work which of these components has to act first?
Mutation rate
Replication of DNA is semi-conservative.
True
Which enzyme unwraps the double helix?
Group of answer choices
Helicase
The double helix of DNA is wrapped about 1¾ times around which of these components?
Nucleosome
In the ribosome, what is the name of the bond that links one amino acid to the next?
peptide bond
Which nucleotide is different in RNA compared to DNA?
uracil
Strands of the backbone of DNA are parallel?
False
Assume that you have a eukaryotic cell with three chromosomes within it. How many 5’ ends would there be?
6 ends
List the two basic categories of nitrogenous bases in nucleic acids.
Purines, pyrimidines
DNA replication in eukaryotes is sped up by multiple origins of replication.
True
There are two types of protein synthesis in eukaryotic cells. These two types can be distinguished because the polyribosome is either _________ or __________ .
Free polyribosomes, Membrane-Bound Polyribosomes
Protein synthesis changes from the language of ________ to the language of _______ .
Nucleic acids, Amino acids
During mRNA maturation what is the name of the part of the mRNA that is removed?
intron
RNA synthesis, also called RNA transcription occurs in three phases. List them from beginning to end in order.
initiation, Elongation, Termination
During DNA replication errors are greatly reduced by enzymes that proof read the newly replicated DNA
True
Uridine is a nucleotide in DNA.
False
Which strand is produced more rapidly?
Leading strand
How many “stop” codons exist?
3; UAA, UGA, UAG
In the lagging stand, the DNA is read from the parental DNA’s 3’ to 5’ end.
True
The DNA polymerase that replicates the parental strand of DNA reads the parental DNA from 5’ to 3” and makes a new DNA strand from 3’ to 5’
False
Which sugar is present in RNA?
Ribose
