Which of the following does NOT occur in prophase
I of meiosis?
a. cytokinesis
b. pairing of homologues
c. formation of a bipolar spindle
d. crossing over
e. condensation of chromosomes
Answer: a
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Match each mechanism of horizontal gene transfer with its definition:
A. Transduction i. DNA transfer between two linked bacterial cells B. Transformation ii. bacteria picks up environmental DNA C. Conjugation iii. gene transfer via a bacteriophage
The two daughter cells that are formed as a result of binary fission
A. each have about half the number of plasmids as the mother cell. B. are members of the same colony. C. have genetically identical chromosomes. D. Two of the answers are correct. They are members of the same colony and have genetically identical chromosomes. E. All of these statements are correct.
The pulmonary artery carries blood away from the ____
a. aorta b. right atrium c. right ventricle d. left atrium e. left ventricle
Why did the pGLO+ cells glow on the LB/Amp/Ara plates but not on the LB/Amp plate?
A) Arabinose is a positive control B) They need the arabinose in order to turn on GFP expression C) The colonies could have glowed on either plate if they were successfully transformed D) Arabinose is a selective marker