Wrong answers Flashcards
(31 cards)
bond that holds the sugar and phosphate molecules together as the backbone of DNA are
covalent bond
during DNA replication at any particular section, these three enzymes listed below are needed. Which of these has the enzymes listed in the order that they are used?
helicase, DNA polymerase, ligase
which of these is an advantage of having multiple replication forks in eukaryotic DNA replication?
it allows DNA replication to proceed more quickly
which of the following conducted the experiments that demonstrated that DNA is the genetic material of bacteriophages?
Hershey and Chase
the processes of transcription and translation are collectively known as
gene expression
in eukaryotes, ribosomes carry out their function in the
nucleus
which region of a structural gene contains the information that specifies an amino acid sequence?
transcribed region
which of the following is the function of a tRNA molecule
joining to only one specific type of amino acid
a gene that is expressed at a relatively constant level in tissues regardless of variations in the animal’s condition is
multifunctional gene
a major difference in the way genes are organized on the eukaryotic and prokaryotic chromosome is that
eukaryotic genes are not grouped together, while prokaryotic genes may be grouped into operons
if a mutation occurs in the operator of the lac operon, what would be the likely results
the repressor protein would not be able to turn off the operon
transcription factors that bind to DNA and stimulate transcription are
activators
regulatory elements the function provide a binding site for RNA polymerase are called
promoter
missense mutations occur when
the mutation causes a single amino acid to change
a researcher determines that a strand of E. coli is producing a shortened version of a protein required for glucose metabolism. what type of mutation would be responsible for this shorter than normal protein
nonsense mution
which of the following base pairs would be targeted and repaired by a mismatch repair system
A-G
which of the following vectors are put into bacteria via transformation
plasmid
what would be the expected effect be on a PCR reaction if the primers used were slightly shorter and more variable than the intended oligonucleotide sequences
reaction would yield a mixture of non specific products
which of the following statements about sister chromatids is true
sister chromatids are exact copies of each other and are formed prior to cell division
the two chromosomes of a homologous pair
carry information for the same characteristics at corresponding locations
which of these more accurately describes meiosis
occurs in the reproductive tissues to make haploid gametes
which of the following statements about the cell cycle is correct
when the S phase of the cell cycle is finished, a cell has twice as many chromatids as the number of chromosomes in the G1 phase
the checkpoint the determines if conditions are favorable for cell division and if the DNA is undamaged is the
G1 restriction point
meiosis I produces __ cells, and meiosis II produces __ cells
two haploid; four haploid
