In a DNA double helix, adenine pairs with ________ and guanine pairs with ________
A) cytosine... thymine
B) guanine... adenine
C) thymine... cytosine
D) uracil... cytosine
C
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A human fetus that has the genotype XO will be designated female because:
A. female sex is determined by the presence of a gene on the X chromosome. B. female sex is determined by the absence of TDF, a protein produced by a gene on the fetus's Y chromosome. C. female sex is determined by only one X chromosome. D. female sex is determined by the presence of TDF, a protein produced by a gene on the fetus's X chromosome.
Overall, a water molecule has no charge but it is a polar molecule. What makes water polar and how does it's polarity contribute to hydrogen bonding?
What will be an ideal response?
A "5? cap":
a. prevents translation. b. prevents the binding of ribosomes. c. marks the mRNA for degradation. d. is added to mRNA but not pre-mRNA. e. protects mRNA from degradation.
What is the process by which a temperate bacteriophage infects a bacterial cell and subsequently integrates its chromosome into the bacterial chromosome?
A) transformation B) lysis C) transduction D) lysogeny E) temperate