Genetic engineering methods have been used to produce vaccines.
Answer the following statement true (T) or false (F)
True
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Double-stranded DNA absorbs less UV light than single-stranded DNAbecause:
A. base stacking in double-stranded DNA increases the absorbance of white light and causes a decrease in the amount of UV light it can absorb. This decrease in UV absorbance is called the hyperchromic effect. B. the bases are on the inside of the helix, inaccessible to the UV light in double-stranded DNA. C. in single-stranded DNA the bases are not interacting so more photons can be absorbed by the pentose rings. D. single-stranded DNA actually absorbs more of the UV light, making less light available to double-stranded DNA. E. of the hypochromic effect that results when hydrogen bonding and base stacking in double-stranded DNA limits resonance in the aromatic rings of the bases.
Activation of which of the following is associated with the formation of focal adhesions and stress fibers?
A) Rho B) Ras C) Cdk-42 D) intermediate filaments E) ?-tubulin
The molecular formula for butane is C4H10
a. true b. false
Which gene therapy is currently approved in the United States?
A) stem cell gene therapy B) enhancement gene therapy C) somatic gene therapy D) germ-line gene therapy