micro ch 9 hw
In what way can a riboswitch directly regulate translation?
By changing the shape of the mRNA
Which are components of an operon in a sequence of DNA?
Regulatory region Structural genes
Which is the correct order of events when a protein is made in the process of translation?
initiation, elongation, termination
an inactive repressor binds to an _____ to make an active repressor
corepressor
The flow of genetic information in a cell is a process starting with ________ which encodes _______ which encodes protein.
dna; rna
One DNA repair mechanism that removes incorrect bases, and replaces them with correct ones, is the Blank______ repair mechanism.
excision
DNA sequences found within a gene that do not encode the protein corresponding to the gene are
intron
The study of the inheritance in living things is
genetics
Several DNA viruses are known to be initiators of cancers and are thus termed
oncogenic
A small circular segment of DNA found in the cytoplasm of bacteria that is capable of independent replication and usually contains nonessential genes is a(n)
plasmid
Mutations that involve the addition, deletion, or substitution of one or a few bases are referred to as Blank______ mutations.
point
Two components of an operon include the ______ region and the _____ gene sequences.
regulatory; structural
When one bacterium donates DNA to other bacterium, it is known as
recombination
Which term refers to the transfer of genes from donor to recipient microorganisms?
recombination
Mutations in DNA that are caused by random mistakes in replication, and are not known to be the result of any mutagenic agent, are
spontaneous mutations
Which kind of lac operon gene encodes an enzyme that is needed to catabolize lactose?
structural
The genes of an operon that code for proteins are
structural genes
Which term, synonymous with codon, describes a trinucleotide sequence coding an amino acid in DNA?
triplet
The three types of RNA that are directly involved in making protein are
-m, messenger, or mRNA -t, transfer, or tRNA - r, ribosomal, or rRNA
What is a riboswitch?
A region within an mRNA that regulates the translation of the mRNA of which they are a part
The carcinogenic potential of a chemical can be determined by the
Ames
Which process uses visible light to repair DNA that has been damaged by ultraviolet radiation?
Photoactivation
Which of the following are functions of RNA polymerase? Terminates the transcription process Synthesizes an RNA molecule from DNA template Seals the fragmented pieces of RNA together after synthesis Unwinds the DNA so that transcription can take place
Synthesizes an RNA molecule from DNA template Unwinds the DNA so that transcription can take place
Methicillin-resistant Staphylococcus aureus (MRSA) strain produces vancomycin resistant enterococci (VRE) with the gene transfer of ______
a transposon containing the vanA operon
