Which sequences of RNA are removed after transcription occurs because they do not code for functional proteins?
a. promoters
b. terminators
c. exons
d. introns
d. introns
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Down syndrome, the most common type of birth anomaly due to an extra chromosome, is also known as ____ 21
Fill in the blank with the appropriate word.
The sum total of all the microbes in a certain environment is termed the ________.
A. phylogeny B. microbial niche C. domain D. microbiome E. biofilm
Why is a variegated plant considered heteroplasmic?
A) The plant has mutant and wild-type chloroplast DNAs distributed amongst the cells in different ratios. B) The plant has only two types of cells, one with only mutant chloroplast DNAs and one with only wild-type chloroplast DNAs. C) All of the plant's cells have mutant and wild-type chloroplast DNAs. D) All of the plant's cells have mitochondria and chloroplasts.
Chromosomes are aligned at the equator of a cell during:
A) telophase. B) metaphase. C) anaphase. D) prophase.