Which of the following is not a role for methylation?
A. Methylation can protect bacterial RNA from restriction enzymes that are used to destroy viral DNA.
B. Methylation of DNA can act as an inhibitor of gene expression.
C. Methylation of DNA can enhance binding of certain proteins.
D. Methylation is important in directing mismatch repair to repair the correct DNA strand.
E. Methylation in eukaryotes can affect the formation of Z-DNA.
A
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In what part of vascular plants are tracheids found?
A. rhizoids B. phloem C. cell walls D. xylem
If a child more strongly resembles one parent's physical traits than the other parent's, the explanation could be due to chromosome movements during ________________.
A. anaphase II B. metaphase II C. prophase II D. prophase I E. telophase I
Which of the following is diagnosed by detection of antibodies against the causative agent?
A) nongonococcal urethritis B) gonorrhea C) syphilis D) lymphogranuloma venereum E) candidiasis
Asexual reproduction essentially involves creating copies of oneself, whereas sexual reproduction involves combining genetic material with another individual to create offspring. Some species are capable of using both asexual and sexual reproduction: under what circumstances would you expect sexual reproduction to be used?
a) stable environments b) foreign environments c) unpredictable environments d) warm environments