What are the DNA repair functions and the modes of activity of glycosylases and methyltransferases?
What will be an ideal response?
Ans: Glycosylases recognize and remove uracil and alkylated bases. Methyltransferases add a methyl group to cytosines, leading to its removal from the nucleotide. Both of these types of enzymes work by "flipping" the base out of the double helix, putting it into a position that allows the active site of the enzyme to cleave the base.
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Treponema pallidum is extremely sensitive to temperature changes and low moisture, thus it is transmitted
A) by intimate person-to-person contact. B) by fomites. C) by vectors. D) through common sources such as food and water.
Which immunoglobulin is the most common in gland secretions?
a. IgG b. IgA c. IgD d. IgM e. IgE
Which of the three modes of selection would be most likely to result in speciation? Why?
What will be an ideal response?
Women with X-linked disorder always pass the genes for the disorder to ________________, while men with X-linked disorder always pass the genes for the disorder to___________ .
A. only their daughters; only their daughters B. both their daughters and sons; only their sons C. both their daughters and sons; only their daughters D. both their daughters and sons; their daughters and sons