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