What type of regulatory transcription factor binds DNA and increases the transcription of a gene?
A. an activator exerting negative control
B. an activator exerting positive control
C. a repressor exerting negative control
D. a combination of both a repressor and activator exerting negative control
E. a repressor exerting positive control
Answer: B
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In reptiles, the circulatory system of the lungs is nearly completely separate from the circulatory system of the rest of the body
Indicate whether the statement is true or false
A country's ecological footprint can be calculated by multiplying its population size by the footprint of each individual. Why are some ecologists concerned about the ecological footprint of a country like India
A. Its population is increasing. B. Its standard of living and land area are increasing. C. Its population and land area are increasing. D. Its standard of living is increasing. E. Both its population and standard of living are increasing.
The lens of the eye becomes opaque with ________.
Fill in the blank(s) with the appropriate word(s).
What is the symbol for sodium?
A. Na B. Dm C. So D. N E. S