The myofibrils contain two protein filaments that contract the muscle. Of these, the ________ are the thinner filaments

Fill in the blank(s) with correct word


actin filaments

Biology & Microbiology

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A relaxed closed-circular DNA of 5,000 bp would have a linking number of:

A. 500 B. 476 C. 347 D. 210 E. 50

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Which of the following is a "cost" associated with sexual reproduction?

a. other than mutation, no new genetic diversity in the next generation b. requires time/energy to find/court mat c. only females can produce offspring d. disruption of beneficial allele/trati combinations e. none of the aboves are costs associated with sexual reproduction

Biology & Microbiology

If a gallstone were to block the bile duct, which type of food would become more difficult to digest?

A) fat B) protein C) sugar D) starch

Biology & Microbiology

Cytotoxic T cells eliminate pathogens by

A) releasing chemicals which are toxic to cellular pathogens. B) ingesting and digesting infected or cancerous cells. C) coordinating the activities of other immune cells. D) releasing chemicals which cause infected or cancerous cells to undergo apoptosis. E) ingesting and digesting cellular pathogens.

Biology & Microbiology