The core promoter in eukaryotes is usually composed of which two features?
A. transcriptional start site and enhancer
B. transcriptional start site and response elements
C. transcriptional start site and TATA box
D. enhancer and TATA box
E. response elements and TATA box
C. transcriptional start site and TATA box
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Retroviruses ____
a. have DNA genomes b. use an RNA intermediate to replicate their genome c. replicate their RNA genome directly to produce progeny RNA genomes d. do not have an envelope e. require reverse transcriptase to replicate their genome
All of the following are involved in PCR EXCEPT
a. free nucleotides. b DNA templates. c. high temperature. d. RNA polymerase. e. low temperature.
Which of the following is the predominant leaf form of environments where the growing season is very short or where nutrient availability severely constrains photosynthesis and plant growth?
A) winter-deciduous leaves B) drought-deciduous leaves C) broadleaf evergreen leaves D) needle-leaf evergreen leaves
The routes of entry for most fungi into the body are
A. urinary and reproductive. B. blood and wounds. C. respiratory and cutaneous. D. digestive and respiratory. E. None of the choices are correct.