The process of transcription is indicated by the letter _____.
answer
A.
Transcription is the process by which information encoded in DNA is converted to information encoded in RNA.
question
The letter E is indicating a process of gene expression that involves _____.
answer
protein breakdown
question
RNA processing is indicated by the letter
answer
B.
As you can see, introns have been removed and a cap and a tail added to the RNA molecule.
question
Which of the following processes is NOT indicated by the label A, B, C, D, or E?
answer
DNA unpacking
This process is indicated by the arrow that precedes arrow A.
question
Enzyme complexes that break down protein are called _____.
answer
proteasomes
question
The nuclear membrane's role in the regulation of gene expression involves _____.
answer
regulating the transport of mRNA to the cytoplasm
question
What is the function of a spliceosome?
answer
RNA processing
question
Protein-phosphorylating enzymes' role in the regulation of gene expression involves _____.
answer
protein activation
question
Which statements about the modification of chromatin structure in eukaryotes are true?
Select all that apply.
answer
Some forms of chromatin modification can be passed on to future generations of cells.
DNA is not transcribed when chromatin is packaged tightly in a condensed form.
Acetylation of histone tails in chromatin allows access to DNA for transcription.
Acetylation of histone tails is a reversible process.
Methylation of histone tails in chromatin can promote condensation of the chromatin.
question
Which statements about the regulation of transcription initiation in these genes are true?
Select all that apply.
answer
Control elements C, D, and E are distal control elements for the imaginin gene.
Both the fantasin gene and the imaginin gene will be transcribed at high levels when activators specific for control elements A, B, C, D, and E are present in the cell.
The fantasin gene will be transcribed at a high level when activators specific for control elements A, B, and C are present in the cell.
question
_____ bind(s) to DNA enhancer regions.
answer
Activators
question
What is the event that IMMEDIATELY follows the last event of this animation?
To view the animation, click here. Then click on the image to start the animation.
answer
binding of RNA polymerase to the promoter
question
Doing which of the following increases your risk of developing heart disease?
answer
Smoking.
question
Your brother died of a heart attack at age 47. Assuming no other risk factors, what does this do to your chance of developing heart disease?
answer
Doubles it
question
Which of the following is true?
answer
If a person has early heart disease, their children may or may not have it.
question
Your aunt is 63 and has a non-fatal heart attack. Which of the following is true?
answer
She is younger than average for having a first heart attack.
question
You are a cardiovascular surgeon. Where do you insert stents?
answer
blocked arteries
question
All your cells contain proto-oncogenes, which can change into cancer-causing genes. Why do cells possess such potential time bombs?
answer
Proto-oncogenes are necessary for the normal control of cell growth and division.
question
The operon model of the regulation of gene expression in bacteria was proposed by _____.
answer
Jacob and Monod
question
Which of these is NOT a component of the lac operon?
answer
regulatory gene only
question
Regulatory proteins bind to _____.
answer
the operator
question
In the presence of a regulatory protein the lac operon is _____.
answer
not transcribed
question
A high concentration of bicoid protein at the opposite ends of a developing Drosophila embryo would result in the development of a _____.
answer
two-headed fly
question
The bicoid gene product is directly responsible for _____ in a developing Drosophila embryo.
answer
the establishment of the anterior-posterior axis
question
The region of a Drosophila embryo with the highest concentration of bicoid protein will develop into the _____.
answer
head
question
What triggers the translation of bicoid mRNA?
answer
fertilization of the egg
question
The bicoid gene is a type of _____ gene.
answer
egg-polarity
question
The region of a Drosophila embryo with a low concentration of bicoid protein will develop into the _____.
answer
abdomen
question
What process produces the gradient of bicoid protein in a fertilized egg?
answer
diffusion
question
Bicoid mRNA is translated in _____.
answer
the fertilized egg
question
The bicoid gene is transcribed by _____.
answer
nurse cells
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