In knockout experiments, researchers ________
a. take genes from one species and express them in another
b. inactivate a gene by introducing a mutation into it
c. inactivate a gene by deleting it from the base sequence
d. add promoters to homeotic genes to increase their expression
b
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Viruses may not be cultivated in
A. live organisms. B. embryonated chicken eggs. C. tissue culture. D. blood agar.
Which of the following develops into a seed?
a. megaspore b. ovary c. egg d. ovule e. anther
The sequencing method that cuts DNA segments into fragments, arranges those fragments based on overlapping nucleotide sequences, and then clones these fragments is called
A. RFLP sequencing. B. shotgun sequencing. C. clone-by-clone sequencing. D. consensus sequencing.
The figure represents tRNA that recognizes and binds a particular amino acid (in this instance, phenylalanine). Which codon on the mRNA strand codes for this amino acid?
a. UGG b. UUC c. GUA d. CAU e. GUG