Which of the following is NOT true about reverse transcriptase?
A. In RNA viruses it uses a DNA intermediate to make more RNA
B. It does not enable HIV to infect the cells
C. It can be found in DNA and RNA viruses
D. It is a type of polymerase
E. In DNA viruses it uses an RNA intermediate to make more DNA
Ans: B. It does not enable HIV to infect the cells
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A black chicken mating with a white chicken produces a black and white speckled chicken. Which inheritance pattern is indicated?
a. codominance b. sex linkage c. multiple alleles d. incomplete dominance
What played a pivotal role in the significant reduction of Northwest Arctic cod reaching a breeding age?
a. Drift nets b. Dredging c. Trawl nets d. Nutrient supply
Receptor mediated endocytosis:
A. is involved in receptor recycling B. involves cell membrane fusion C. can involve the protein clatherin D. can induce a refractory period for signal transduction E. all of the above
Acute Glomerulonephritis is a sequalae of repeated infection with Streptococcus pyogenes. The pathogenesis involved in this complication is
A. Deposition of antigen-antibody-complement complexes on the basement membrane of kidney glomeruli B. Molecular mimicry in which some of the bacterial proteins resembles those of basement membrane of kidney glomeruli C. An immunological response to specific Protein A D. An immunological response to the antigen determining the Lancefield classification of the bacterium