During the process of muscle contraction, Ca2+ binds tropomyosin

____________________ Indicate whether the statement is true or false.


F, troponin

Biology & Microbiology

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The connection between stem cells and cancer is that

A) all stem cells are also cancer cells. B) cells may become cancerous by expressing "stemness" genes. C) stem cells rescue cells that have become cancerous. D) both stem cells and cancer cells have inactivated telomerase.

Biology & Microbiology

Mitochondria likely arose from _________ and chloroplasts likely arose from _________

Fill in the blank(s) with correct word

Biology & Microbiology

Denaturation disrupts the secondary and tertiary structure of proteins. However, denaturation is not strong enough to disrupt what interaction that is relevant to protein structure? 

A. van der Waals attraction B. hydrophobic exclusion C. hydrogen bonds D. peptide bonds E. ionic bonds

Biology & Microbiology

The primary portal of entry for fungal infections is

A) Digestive system B) Nervous system C) Respiratory tract D) Through skin E) Urinary tract

Biology & Microbiology