Which structure will restrict the growth of viruses?
a. Recombinant DNA
b. Phospholipids
c. Restriction enzymes
d. Plasmid
e. Vectors
c
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You have learned that having linear DNA has consequences, the major one being that the DNA gets shortened every time it replicates, something that does not happen with the circular DNA found in prokaryotes
What, then, is the advantage of having linear DNA? A. Linear DNA is easier to package than circular DNA. B. Linear DNA is less susceptible to viruses than circular DNA. C. Since mitochondria and chloroplasts have circular DNA, nuclear DNA had to be linear. D. Replication can begin from multiple sites on a linear DNA, allowing for rapid replication and relieving the evolutionary pressure for a streamlined genome. E. All of the answer options are correct.
The E. coli chromosome is a circular double-stranded DNA, 4.6 × 106 in length. If the superhelical density (?) is
-0.05, what is the linking number for this supercoiled molecule? A. 460,000 B. 438,095 C. 416,190 D. 219,050 E. 21,905
When you arrive at your biology lab, you notice that your lab bench is set up with containers of clay, Mg2+, and nucleotides. What hypothesis do you think you will be testing during the lab, and what is the purpose of the Mg2+?
A. Formation of small organic molecules at deep sea vents; Mg2+ reacts with hot H2S. B. Formation of complex organic polymers on the surface of clay; Mg2+ catalyzes bond formation between nucleotides and clay. C. Formation of small organic molecules on the surface of clay; Mg2+ catalyzes bond formation between nucleotides and clay. D. Formation of small organic molecules in a reducing atmosphere; Mg2+ catalyzes redox reactions.
Interpathway interaction is called cross talk
1.True 2.False