Induced pluripotent stem cells (iPS cells) are produced by _____
a. transferring a vitamin A gene into rice plants
b. reprogramming adult cells by transferring certain master control genes into the cells' nuclei
c. mutating certain genes in human blastocysts
d. harvesting multipotent stem cells from umbilical cord blood
e. harvesting enzymes from cadavers, and then using the enzymes to reprogram adult cells
b
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The region in a tRNA molecule that base-pairs with mRNA during translation is the ____
a. anticodon b. aminoacylation site c. TATA box d. cloverleaf e. reading frame
In this representation of transcription, strand #
____ is ____ because it ____.
a. 2; RNA; is double-stranded b. 3; RNA; contains uracil c. 2; RNA; contains thymine d. 2; RNA; has no uracil e. 3; DNA; contains adenine
Which of the following does NOT belong with all the others?
a. angiotensins b. ADH c. aldosterone d. renin e. insulin
What are carcinogens?
A) Physical or chemical factors that can lead to mutations causing cancer B) All mutagens C) Errors during DNA replication D) Chemical factors that can treat cancer