Study sets, textbooks, questions
Upgrade to remove ads
Terms in this set (32)
Cell density may influence gene expression in bacteria and lead to release of virulence factors, biofilm formation, etc. This process is known as...
During the DNA replication process for a double strand, the _____ is replicated continuously, while the ______ strand is replicated in fragments. This is because the replication enzyme can only work in one direction 5' --> 3'.
During double-stranded DNA replication, each daughter cell receives ____ copy/copies of the parent strand, a process that occurs in a ________ manner.
What is the type of chemical bond is referred to by the dotted blue lines?
In reference to the previously illustrated G-C base pair: What enzyme is responsible, with the aid of ATP's energy, for breaking that chemical bond and unwinding the double helix during DNA replication?
The sigma factor binds to a bacterial gene's ______ in order for transcription to be initiated by RNA polymerase.
In translation, there are 64 possible codon within the Genetic Code but______ of them do not code for any amino acids because they act as _______.
3; stop codons
The proper amino acid binds to and "charges" the matched tRNA molecule at the tRNA's...
What type of DNA is transferred between the donor [male] and the recipient [female] cell?
An incoming bacteriophage infects a bacterium but is its DNA is degraded by ___________enzymes. These enzymes are not attacking the cell's own DNA due to the process of _____________of the host cell's DNA.
How might competent cells benefit by importing foreign DNA?
to use it as food
to replace defective genes
to increase fitness
This level of control of gene expression is the least reversible, the most drastic and often the most risky:
A newly synthesized kinase enzyme is modified in shape by phosphorylation and immediately acquires phosphorylase activity (and is no longer a kinase). This new protein just experienced a(n) ___________ change.
RNAses attack a newly made mRNA and prevent it from serving as a template for translation. This is an example of regulating gene expression at the _________ level.
The antibiotic chloramphenicol inhibits peptidyltransferasewithin the P-site and therefore can be said to control gene expression at the _____________ level.
Ribosomes are characterized by their sedimentation rate in Svedberg (S) units.This "S value" is a result of the ribosome's...
mass, shape and density
RNA within a ________ has the least stability and is rapidly recycled.
RNA transcript (mRNA)
Let's assume a point mutation in the middle of a gene results in a nonsense mutation to the triplet (tryptophan) codon in DNA, making the change from ACC --> ACT. After the mutation, the new protein coded by that gene will ________ compared to the original protein.
You would correctly predict that the amino acid tryptophan is being synthesized in E. coli bacteria when the...
tryptophan repressor is NOT bound to tryptophan.
When lactose if not available for consumption by E. coli, you would correctly predict that the lac repressor...
is bound to the operator
Multiple copies of a protein are rapidly synthesized best by...
feeding the RNA transcripts through polysomes
To initiate recycling, RNase enzymes are ubiquitous and most rapidly degrade...
A new operon's repressor is able to bind to the operator and stop transcription when the product of the structural genes is present. Therefore, you would correctly conclude that the purpose of the structural genes is to...
synthesize a molecule necessary for the cell's survival
From the above question: When the RNA polymerase is able to bind to the operon's promoter, it will be able to transcribe _____ of the structural genes.
Chargaff's Rules (for base-pairing) apply only to...
bacteria & archea
double-stranded DNA viruses
bacteria, archea & eukaryotes
is often involved with termination of transcription at a region of that transcript with C-rich sequences.
Restriction endonucleases (restriction enzymes) will degrade foreign DNA within the host bacterium by recognizing the foreign DNA's...
The major function the aminoacyl t-RNA synthetase enzymes is to...
add an amino acid to a t-RNA
A G protein (or GTPase) will bind to GTP , thereby changing the function of that G protein. This therefore would be an example of __________regulation of gene expression.
Methyl mismatch DNA repair is most likely to be performed on mutations that occurred due to...
natural errors in replicating DNA
What phenomenon involves secretion of autoinducers to change gene expression in a dense population of bacteria?
Gram negative bacteria stain pink (from the Gram's stain) because they have
______ cell walls.
Recommended textbook explanations
Nelson Science Perspectives 10
Christy C. Hayhoe, Doug Hayhoe, Jeff Major, Maurice DiGiuseppe
Biology Study Workbook A
Kenneth R. Miller, Levine
Texas Science Fusion: Grade 6
Science Fusion Texas, Grade5: New Energy for Science!
Sets with similar terms
Control of gene expression
Bio 203 Exam 4
Exam 2 Test Questions
Other sets by this creator
Chapter 21 Physiology
Nephron steps Physiology
Chapter 19 and 20 Physiology
Other Quizlet sets
Marketing Exam 2
World History Chapter 2
AP Bio: Power Words