Lactose induces the transcription of the lactose operon by:
a. binding to the allosteric site of the repressor after being converted to allolactose.
b. stimulating lactose metabolism in the cell.
c. binding to the glucose operon, making it inoperable.
d. binding to the allosteric site of RNA polymerase.
e. inhibiting the activity of CAP.
A
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An autosomal recessive disorder
a. requires that only one parent be a carrier. b. displays its symptoms only in heterozygotes. c. is more frequent in males than females. d. will appear only in children of parents who both carry the gene. e. is dominant in females.
Fixation of carbon is accomplished by:
a. photosynthetic organisms. b. primary consumers. c. decomposers. d. bacterial decomposers. e. burning of organic matter
Smooth fur dominates rough fur; black and white fur are incompletely dominant and result in gray. A rough gray crossed with a rough gray would produce
A. all rough gray. B. 1/2 rough black, 1/2 rough white. C. 1/2 rough black, 1/4 rough gray, 1/4 rough white. D. 1/4 rough black, 1/2 rough gray, 1/4 rough white.
With fully automated Sanger sequencing, all four chain-terminating ddNTPs can be added into a single reaction. This is different from the traditional slab gel Sanger sequencing, where a different reaction had to be carried out for each ddNTP
The mixing of all four ddNTPs can be carried out because ______________. (a) the fully automated Sanger sequencing reactions are loaded onto a capillary gel. (b) the fully automated Sanger sequencing reactions utilize ddNTPs each labeled with a different fluorescent tag, which allows all four ddNTPs to be incorporated into a single molecule of DNA. (c) the fully automated Sanger sequencing reactions generate a set of products, each of which carries a single fluorescent tag whose color reveals the identity of the base that is at the end of the product. (d) the fully automated Sanger sequencing reactions do not require DNA polymerase because the bases are read as the DNA is pulled through a tiny pore at the end of the capillary gel.