Cytosine deamination is a common mutation that results in a cytosine being converted to a uracil. See Figure (a) below. During the processes of DNA repair and DNA replication, which of the following can occur?
Cytosine deamination can result in two different outcomes depending on the state of the
cytosine.
What will be an ideal response?
The RNA base will be detected and replaced with cytosine.
The RNA base will remain, and in the next round of replication, an A-T base pair will occur.
The methylated thymine is recognized as the incorrect base and will be repaired.
The next round of replication will result in the incorporation of an A-T base pair.
The methylated thymine will remain, and the person will be a heterozygote at this locus.
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The use of ____________________ or ____________________ for stem cell therapies offers alternatives to the
destruction of human embryos that occurs when embryonic stem cells are harvested. Fill in the blank(s) with the appropriate word(s).
Chloride ions move by ________, following the transport of sodium out of the proximal tubule
Fill in the blank(s) with correct word
Archaea differ from bacteria because archaea
a. lack peptidoglycan b. lack nuclei c. reproduce by binary fission d. use organic compounds for food
Allele that is located on an X chromosome; not all X-linked genes code for sexual characteristics.
What will be an ideal response?