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100
However, if the centromere is just off-center, it is classified as this
What is submetacentric
100
When non-disjunction occurs during meiosis 2, this results after fertilization.
What is one trisomy, one monosomy, and two normal ploidy
100
Forms phosphodiester bond between 3'OH and 5' tri-phosphate
What is DNA polymerase
100
In mammals, the B cell undergoes several changes when activated by its target pathogen. Which of the following occurs? -The b cell self destructs -the b cell receptor becomes secreted rather than membrane-bound -the b cell is flagged -the b cell undergoes apoptosis
What is the b cell receptor becomes secreted rather than membrane-bound
100
Which of the following is an example of genetic drift in a population? -Heterozygotes of a particular gene randomly pass A or a -Some individuals have more offspring -Some individuals die before repro age -None of these represent events that may lead to it -All of these may lead to it
What is ALL
200
those that are just off the end are classified as this
What is Acrocentric
200
This scientist used the same two strains of bacteria as griffith to demonstrate that DNA is the transforming substance. The experiment involved the use of RNase, protease, and DNase to remove the variables RNA, protiens, and DNA.
What is Avery, MacLeod and McCarthy
200
Unwinds DNA to provide Single strands of DNA
What is helicase
200
What type of mutation is hutchinson- Gilford Progeria Syndrome considered? (c->T)
What is transition
200
In bacterial transcription the core enzyme and the sigma factor join to form this
What is holoenzyme
300
A gene with two or more distinct alleles within a population
What is polymorphic
300
The scientist studied the nucleotide base composition of DNA in a variety of organisms and found that the ratio of bases is always the same.
What is Chargaff
300
"Seals the gap" by forming a phosphodiester bond between nucleotides without the triphosphate group
What is Ligase
300
Modification of histone proteins is an example of gene regulation through this:
What is Epigenetic modification
300
This is required for initiation of transcription in prokaryotes
What is holoenzyme
400
the frequency of a particular allele within a population
What is Allele frequency
400
Which of the following is not a chemical bond that is found within a DNA molecule
What is ionic bond
400
Where would the lac repressor be bound in an E. coli growing in the presence of lactose, absence of glucose
What is the repressor would not be bound
400
In DNA: lays down RNA primers to provide a 3' OH
What is Primase
400
Transfer RNA bind to amino acids in a specific manner. That is, each tRNA binds to only one of the twenty amino acids. This specificity of the tRNA is conferred by this
What is Aminoacyle tRNA synthetases
500
a rare allele within a population
What is Mutant allele
500
Which DNA nucleotide bases are purines? pyrimidines? two ring structures? one ring structure?
What is AG, CT, Purines, pyrimidines
500
E. Coli growing in lactose and glucose -will synthesize B-Galactosidase at a high level -will synthesize lac permease at a high level -Will have low levels of cAMP -The repressor will be bound by allolactose
What is -will synthesize lac permease at a high level -Will have low levels of cAMP
500
Associate with single strands to prevent re-annealing during replication
What is Single strand binding protiens
500
This type of gene mutation may lead to a frameshift
What is deletion