WorksheetsMutations and Gene Regulation
Total questions: 19
Worksheet time: 19mins
DNA molecule segment is : TTA-CGC-AAG
The mutated DNA segment is TTC-GCA-AG. This is an example of ___ mutation.
Substitution
Deletion
Insertion
Inversion
Why are insertion and deletion mutations so harmful?
They change all of the codons from the mutation on down the line, which changes the amino acid sequence
They insert things that an organism doesn't need.
They often delete things that organisms need.
Insertion and deletions are not any more harmful than substitution mutations.
A substitution mutation that has no effect
on amino acids sequence
Insertion Mutation
Translocation
Silent Mutation
Deletion Mutation
A frameshift mutation where a nucleotide base
is removed from the DNA sequence.
Deletion Mutation
Substitution Mutation
Translocation
Silent Mutation
Operons are found in the cells of which of the following types of organisms?
prokaryotes
eukaryotes
animals only
viruses
What is the name of the stretch of DNA where RNA polymerase binds?
operator
promoter
enhancer
regulatory gene
The "on/off" switch for an operon is called the
promoter
enhancer
operator
gene
What is a gene?
A segment of RNA that encodes for a protein
The portion of the chromosome that does not get transcribed
A segment of DNA that encodes for a protein
The collection of your chromosomes
The repressor is the protein product of a(n)
operator
regulatory gene
lac gene
corepressor
The tryptophan operon is
permanently turned on.
turned on when tryptophan is present in the growth medium.
turned off only when glucose is present in the growth medium.
turned off when tryptophan is added to the growth medium.
In the lac operon model, the genes within the operon will be expressed if
lactose is absent in the cell
glucose is present in the cell
lactose is present in the cell
tryptophan is present
Hox genes are the most powerful control on the morphology of animals. They do this by:
being highly conserved.
coding for the body plan.
coding body segmentation.
regulating transcription of other genes.
Which of the following is NOT part of the operon?
promotor
operator
gene(s)
regulatory gene
