A major limitation of CRISPER-Cas to treat human disease in vivo is modifying millions of cells. What are the characteristics of successful delivery vehicles?
A) They bind to target proteins.
B) They induce an immune response.
C) They are carried by erythrocytes.
D) They are encapsulated in target cells (via endosomes).
Answer: D
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Virtually all enzymes are:
A) carbohydrates. B) nucleic acids. C) proteins. D) substrates.
The vampire squid was placed in the order Vampyromorpha on account of:
a. it has ten arms, but looks like an octopus. b. it appears to drift rather than actively swim. c. it has tentacles that can be coiled up. d. all the above
All of the following are factors in enzyme-catalyzed
reactions that work alone or in combination to lower the activation energy EXCEPT a. helping substrates get together. b. orienting substrates in positions favoring reaction. c. using ATP as an energy source. d. shutting out water molecules. e. inducing a fit between enzyme and substrate.
Resident flora of the intestines include
A. Bacteroides. B. Haemophilus. C. Staphylococcus. D. Streptococcus. E. All of these choices are correct.