What happens to the ATP molecule after it has been used to do work?
A. It is completely destroyed.
B. It breaks down into carbon dioxide and water.
C. It is split into two molecules of pyruvic acid.
D. It loses a phosphate group and is converted to ADP.
Answer: D
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Calcium ions regulate contraction of smooth muscle cells by binding to _____
A) troponin B) tropomyosin C) actin D) myosin E) calmodulin
Cliff has colorblindness and icthyosis, which causes scaly skin. Both traits are X-linked recessive. The probability that he transmits both traits to his sons is
A) 0 B) 1/4 C) 1/2 D) 3/4
The pharynx opens into both the trachea and _________
Fill in the blank(s) with the appropriate word.
Food poisoning is often the result of ingesting microbial toxins, not the microbes themselves.
Answer the following statement true (T) or false (F)