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

Biology & Microbiology

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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

Biology & Microbiology

Chromosomes are aligned at the equator of a cell during:

A) telophase. B) metaphase. C) anaphase. D) prophase.

Biology & Microbiology

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.

Biology & Microbiology

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.

Biology & Microbiology