In eukaryotes, very long genes are usually the result of very long __________
a. 5? splicing sites
b. promoters
c. introns
d. exons
e. None of the above
Ans: c
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A mutation in a promoter region that causes the promoter sequence to more closely resemble the consensus sequence is called an up promoter mutation and results in a decrease in transcription
Indicate whether the statement is true or false
In which structure of the digestive tract does digestion of starches begin?
a. in the esophagus b. in the large intestine c. in the mouth d. in the small intestine
Like all theories, the cell theory is never accepted by scientists as an "absolute truth." Which statement best explains why?
A) A theory evolves from collecting information, forming hypotheses, and then verifying the predictions of the hypotheses. B) A theory is only a collection of hypotheses that have been verified by experimentation. C) A scientific theory is not based on experimental evidence or observations. D) Future evidence may cause a theory to be modified or even rejected
The group that is the most inclusive and has recently been added to the classification scheme is ____
a. kingdom b. protista c. eukarya d. domain e. eukarya and domain