The frequency of heterozygotes for cystic fibrosis shows ethnic variations
a. True
b. False
True
Biology & Microbiology
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The site of new primary growth at the apex of a shoot is the
a. terminal bud. b. internode. c. axil. d. lateral bud. e. node.
Biology & Microbiology
Using PGD to screen for embryos that would become suitable donors for siblings is illegal under any
circumstance. Indicate whether the statement is true or false.
Biology & Microbiology
The activity of Rab GTPases are regulated by all of the following classes of proteins except
a. GAP (GTPase activating protein). b. GDI (GDP-dissociation inhibitor). c. GEF (Guanine nucleotide exchange factor). d. GTF (Guanine nucleotide trypolysis factor).
Biology & Microbiology
Why are embryonic stem cells different from adult stem cells?
a. they can become any kind of cell (totipotent) b. they are haploid c. they have different genes d. they are committed
Biology & Microbiology