A yeast artificial chromosome (YAC) is a ____ that can accommodate large DNA inserts and uses the eukaryote yeast as a host cell
a. restriction enzyme produced from yeast chromosomes
b. labeled nucleic acid used to identify a clone within a genome and
c. q arm of chromosome 15 within a cell that encodes for a restriction enzyme and
d. cloning vector that has telomeres and a centromere
e. cloning vector that has 23 chromosomes
d
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The most fundamental grouping in the classification of living organisms is the _____
a. class b. genus c. family d. order e. species
The primary reason that Earth experiences seasons is because of the:a
Earth's rotation. b. Earth's orbit. c. Earth's tilt on its axis. d. unequal thickness of the Earth's atmosphere. e. different layers of the Earth's atmosphere.
How do some bacteria respond to adverse environmental conditions?
a. Bacteria shrink in size. b. Bacteria form endospores. c. Bacteria release exotoxins. d. Bacteria develops a cyst and fills it with fluid. e. Bacteria build up more protein in their capsules.
Why might life be much older than LUCA?
What will be an ideal response?