Which of the following is an enzyme used in cloning that breaks covalent bonds?
A. DNA ligase
B. restriction endonuclease
C. reverse transcriptase
D. DNA polymerase I
E. polynucleotide kinase
B
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Bifidobacteriales are best characterized as Gram-positive, motile, spore-forming rods.
Answer the following statement true (T) or false (F)
In humans, heritability of clubfoot is 0.8. This means that expression of this condition is
A) strongly influenced by environmental factors. B) solely dependent on inheritance of the clubfoot gene(s). C) strongly dependent on inheritance of the clubfoot gene(s) but also influenced by environmental factors. D) inherited from an affected parent 80% of the time.
Which organ and hormone pair is incorrectly matched?
a. pancreas and insulin b. thyroid gland and thyroxine c. hypothalamus and melatonin d. adrenal cortex and glucocorticoids e. posterior pituitary and oxytocin
Most innate immune responses rely on
A. recognition of specific antigens. B. pathogens being engulfed and destroyed. C. plasma cells to secrete antibodies. D. IgM antibodies. E. clonal selection to replicate specific lymphocytes.