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1) Estrogen increases the risk of breast and uterine cancers because ita) inhibits differentiationb) causes dna damagec) turns on the BRCA oncogenesd) acts as a tumor promoter by stimulating cellproliferatione) blocks apoptosis
2) Which of the following is a common difference between normal cells and cancer cells?a) density-dependent inhibition of proliferationb) Contact inhibition of migrationc) growth factor requirementsd) Cell adhesione) all of the above
3) The T antigen of SV40 virus binds to DNA and initiatesa) expression of the virus early genesb) expression of the virus late genesc) proteolytic cleavage of cellular proteinsd) DNA replicatione) DNA strand breaks
4) The RNA viruses that most commonly pick up cellularoncogens are thea) adenovirusesb) retrovirusesc) papilloma virusesd) HIV virusese) hepaptis C viruses
5) The viral raf oncogene produces a constiitutively activeprotein because thea) gene is always onb) kinase domain is mutant and cannot be competitivelyinhibitedc) regulatory domain has been replaced by viral sequences andthe protein cannot be turned offd) GtPase activity is deficient and the protein is always inthe GTP forme) miRNA binding site is mutated so translation cannont beinhibited
The ability of certain people to taste a chemical called PTC isgoverned by a dominant allele T, and the inability to taste PTC byits recessive t. If 24% of the population is homozygous dominantand 49% is heterozygous, what is the frequency of t?
Hemophilia is a sex-linked trait. A normal woman whose father has a hemophilia marries a normal man. What is the chance for their children to have the trait? Give the full explanation - genotypes of all involved.
Tropical rainforests are already being destroyed at a very rapid rate. Imagine if this rate were further accelerated, for example, by highly exploitative, rapid land-clearing policies in the Amazon or SE Asia. What would be the expected effects of..
almost all viruses have to produce viral proteins that aid evasion of the host immune response. for each of the viral
What four components are necessary for prokaryotic translationto begin? What four components are necessary for prokaryotic translationto begin?
what are the advantages of using the formation of lactic acid to generate ATP.
What would happen to the amount of blood in the ventricles at the end of diastole if diastolic duration becomes very short and what would this do to the pumping efficiency of the heart?
With these anatomical features in mind, do research to find an angiosperm species that has structural modifications to leaves, stems, roots, or flowers that result in adaptive functions. For example, a California Barrel Cactus has spines in place ..
What criteria are most often used in taxonomix classification? What does the wobble of the anticodon refer to? What is the normal sequence that genetic information is transferredfrom chromosome to trait? What leaf structure and environmental conditio..
All of the following are directly associated with Photosystem II EXCEPT:
What are the advantages and disadvantages of having two immunesystems in our body: the innate and adaptive?
How many chromosomes would a (haploid, diploid,tetraploid) cellcontain if it normally had 20 chromosomes per somatic cell?
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