Which of the following is one of the technical reasons why gene therapy is problematic?
A) most cells with an engineered gene do not produce gene product
B) transferred genes may not have appropriately controlled activity
C) cells with transferred genes are unlikely to replicate
D) mRNA from transferred genes cannot be transcribed
Answer: B) transferred genes may not have appropriately controlled activity
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Biology
- The osmoregulatory/excretory system of a freshwater flatworm is based on the operation of _____.
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- The end product of thymine degradation is _______.
- All of the following are directly involved in protein turnover except _______.
- Components of the transulfuration pathway include all of the following except _____.
- Homogentisate is an intermediate in the degradation of __________.
- Amino acids whose degradation yields a-ketoglutarate include all of the following except _________.
- Amino acids whose degradation yields succinyl-CoA includes all of the following except ________.
- Which of the following reactions require SAM?
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- Amino acids whose degradation yields acetyl-CoA include all of the following except ________.
- All of the following are referred to collectively as the branched chain amino acids except _________.
- The fixation of nitrogen requires _______.
- Asparagine is formed from aspartic acid and _________ .
- The oxidation state of the methenyl group (-CH=) is comparable to that of ____.
- All of the following are directly involved in the synthesis of deoxyribonucleic acid except _______.
- One-carbon carriers in metabolism include
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- The conversion of phosphatidylethanolamine to phosphatidylcholine requires ______
- Chorismate is a precursor in the synthesis of all of the following except _______.
- SAM is a methyl donor in the synthesis of ______.
- The tranport of GSH out of cells serves all of the following functions except ______.
- All of the following are purine bases except _____.