In a plaque assay, the number of infectious virions is usually identical to the number of virus particles present.
Answer the following statement true (T) or false (F)
False
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Why is transcription-coupled repair (TCR) considered particularly efficient when compared to nucleotide excision repair (NER)?
A. The exinuclease employed in TCR removes a smaller fragment containing the damage. B. TCR targets transcriptionally active regions for repair over damage in less active parts of the genome. C. It uses error-prone polymerases so it can move through damaged areas faster. D. It directly repairs the damage rather than removing and replacing the damaged strand. E. TCR requires less protein interactions.
The optimal pH for enzyme 2 is:
a. 2. b. 3. c. 4. d. 5. e. 6.
In club fungi, zygotes form from
a. meiosis. b. mitosis. c. nuclear fusion d. nuclear fission. e. hyphal fusion
How many centimeters long is a human fetus at the end of the first trimester?
1.3 cm 2.5 cm 3.10 cm 4.15 cm