2If a scientist is studying the formation of new blood vessels within a tumor, he or she would be studying the process of
b blood vessel promotion
Which are cancer-causing genes in mice and humans?
a totipotent genes
d inducible genes
e tumor suppressor genes
One gene has exons LMNOP In nerve cells, the mRNA molecules from this gene contain the exons LMN In muscle cells, the mRNA molecules from this contain MNO What causes the difference between the mRNA molecules in different tissues?
a DNA activation
b DNA processing
c mRNA posttranslational control
d mRNA activation
e pre-mRNA splicing
What kind of access does RNA Polymerase have to heterochromatin?
d varied by chromosome
Transcription activator proteins bind to _(blank) _ on DNA
b regulatory genes
Which molecules regulate the process of transcription by binding genes and turning on their expression?
a transcriptional factors
b posttranslational control promoters
c repressible control factors
d translational factors
e heterochromatin factors
Which of the following occurs outside of the nucleus in eukaryotic cells?
a chromatin packing
b mRNA processing
c transcriptional control
d translational control
e posttranscriptional control
Not yet answered
Marked out of 100
Which of the following genes is located outside the operon and codes for a repressor protein that can deactivate the operon?
a structural gene
b promoter gene
c regulatory gene
d homeotic gene
e operator gene
What is the role of transcription factors?
a binding heterochromatin to prevent transcription
b binding promoter of a gene to start translation
c binding promoter to start transcription
d binding operator to prevent transcription
e binding repressor to prevent transcription
Which of the following statements is true about the lac operon?
a The lac operon is usually turned off in the presence of lactose
b The lac operon is usually turned on in the presence of any sugar
c The lac operon is usually turned on in the presence of glucose
d The lac operon is usually expressed continuously in the cell
e The lac operon is usually turned on in the presence of lactose
What is the inactive X chromosome found in females?
a a Barr body
b a histone
c a nucleosome
d a repressible chromosome
e an inducible chromosome
Which of the following would, if found, be a new discovery about stimulatory signal transduction pathways for the development of cancer?
a activating factor
b transcription factor
c growth factor