BIO 210 EXAM 5 STUDY GUIDE
QUESTIONS AND CORRECT ANSWERS
A mRNA molecule with several ribosomes is attached is called a
________ - correct answer- Polyribosome
After the last tRNA for protein is ejected from the E site, the
ribosome complex disassembles, what does this say about the
importance of tRNA binding to the integrity of this complex -
correct answer- It is very important
An RNA molecule that possesses catalytic activity is called a
________ - correct answer- Ribozyme
At the 3' end of an Okazaki fragment, what nucleotide polymer is
present - correct answer- DNA polymerase III
At the 5' end of an Okazaki fragment, what nucleotide polymer is
present - correct answer- Primase
At the ori in a bacterial chromosome, what is the region of
replicating DNA consisting of two replication forks, which are
moving in opposite directions - correct answer- oriC
,Chemical mutagens alter nucleotides, which then affect DNA
synthesis - correct answer- 1. NT base analogues that may
be substituted into DNA, but that pair incorrectly during DNA
replication
2. Interfere with DNA replication by inserting into DNA and
distorting the double helix
3. Cause chemical changes in bases that change their pairing
properties
Chromatin is composed of protein and DNA. Likewise bacterial
viruses (bacteriophage) are composed of DNA and protein. In
the Hershey and Chase experiments which of these two
molecules entered the bacterial cell and which stayed on the
outside? - correct answer- S-protein stays outside cells
P-DNA enters cells
DNA polymerase I plays a primary role in DNA repair during
replication. How many other DNA repair enzymes have been
identified in humans - correct answer- 130
DNA polymerase III error rate is 1 base per _______ bases. -
correct answer- 10,000
, Eukaryotic chromatin looks like "beads on a string" under the
electron microscope. What is the bead and what is the string -
correct answer- Bead: Nucleosome
String: Linker DNA
Final DNA error rate is 1 base per _______ bases - correct
answer- 1 billion
For our purposes, mutations, the changes in DNA structure are
both large-scale and small scale. The examples such as
nucleotide substitution, insertions and deletions are examples of
which kind of mutation - correct answer- Small Scale
Given protein sequence, what is the challenge of identifying the
nucleotide sequence that encoded it - correct answer- The
codons must be read in the correct reading frame for the
specified polypeptide to be produced
Griffith's experiments with heat killed pathogenic bacteria and
live non-pathogenic bacteria indicated something from the dead
bacteria could do something to the living, non-pathogenic
bacteria that he called transformation. What changes were
observed in colony appearance and pathogenicity? - correct
QUESTIONS AND CORRECT ANSWERS
A mRNA molecule with several ribosomes is attached is called a
________ - correct answer- Polyribosome
After the last tRNA for protein is ejected from the E site, the
ribosome complex disassembles, what does this say about the
importance of tRNA binding to the integrity of this complex -
correct answer- It is very important
An RNA molecule that possesses catalytic activity is called a
________ - correct answer- Ribozyme
At the 3' end of an Okazaki fragment, what nucleotide polymer is
present - correct answer- DNA polymerase III
At the 5' end of an Okazaki fragment, what nucleotide polymer is
present - correct answer- Primase
At the ori in a bacterial chromosome, what is the region of
replicating DNA consisting of two replication forks, which are
moving in opposite directions - correct answer- oriC
,Chemical mutagens alter nucleotides, which then affect DNA
synthesis - correct answer- 1. NT base analogues that may
be substituted into DNA, but that pair incorrectly during DNA
replication
2. Interfere with DNA replication by inserting into DNA and
distorting the double helix
3. Cause chemical changes in bases that change their pairing
properties
Chromatin is composed of protein and DNA. Likewise bacterial
viruses (bacteriophage) are composed of DNA and protein. In
the Hershey and Chase experiments which of these two
molecules entered the bacterial cell and which stayed on the
outside? - correct answer- S-protein stays outside cells
P-DNA enters cells
DNA polymerase I plays a primary role in DNA repair during
replication. How many other DNA repair enzymes have been
identified in humans - correct answer- 130
DNA polymerase III error rate is 1 base per _______ bases. -
correct answer- 10,000
, Eukaryotic chromatin looks like "beads on a string" under the
electron microscope. What is the bead and what is the string -
correct answer- Bead: Nucleosome
String: Linker DNA
Final DNA error rate is 1 base per _______ bases - correct
answer- 1 billion
For our purposes, mutations, the changes in DNA structure are
both large-scale and small scale. The examples such as
nucleotide substitution, insertions and deletions are examples of
which kind of mutation - correct answer- Small Scale
Given protein sequence, what is the challenge of identifying the
nucleotide sequence that encoded it - correct answer- The
codons must be read in the correct reading frame for the
specified polypeptide to be produced
Griffith's experiments with heat killed pathogenic bacteria and
live non-pathogenic bacteria indicated something from the dead
bacteria could do something to the living, non-pathogenic
bacteria that he called transformation. What changes were
observed in colony appearance and pathogenicity? - correct
