Segments of polypeptides that are retained following protein splicing are called

A) introns.
B) exons.
C) inteins.
D) exteins.
E) cleaved.


D) exteins.

Biology & Microbiology

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Given the following LD50 values for Bacillus anthracis, through which portal of entry is it easiest to get anthrax?

A) ingestion: 1 million endospores B) All are equally easy portals of entry. C) cutaneous: 50 endospores D) inhalation: 20,000 endospores

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Chemotaxis is a sensory response affecting the rotational direction of the flagellar motor

Indicate whether the statement is true or false.

Biology & Microbiology

The codon on the ________ matches with the anticodon on the ________ to direct the addition of the correct amino acid to the growing polypeptide chain

A) mRNA / tRNA B) tRNA / mRNA C) DNA / mRNA D) tRNA / rRNA

Biology & Microbiology

What is the name of the response to an injury in which fluids leak from dilated blood vessels, causing redness and swelling?

A. Innate response B. Lymphatic response C. Clonal selection response D. Inflammatory response

Biology & Microbiology