What is a function of prokaryotic common pili?
a. biofilm formation
b. transfer of DNA
c. protein polymerization
d. energy production
e. lipid synthesis
ANSWER: a
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Chemical reactions are classified as exergonic if ________
a. they involve gain or loss of atoms b. they need a boost of energy to begin c. they end with a net release of energy d. the bonds in the reactants have more energy than the bonds in the products
________________ in the skin functions as a sunscreen, absorbing ultraviolet (UV) radiation that could damage DNA and other biological molecules.
Fill in the blank(s) with the appropriate word(s).
According to the sliding filament model of muscle contraction, a sarcomere contracts when its
A) thick filaments slide across its Z lines. B) thin filaments slide across its Z lines. C) thin filaments slide along its thick filaments. D) thick filaments move closer together.
What does staging tumor mean?
a. Assessing the degree of differentiation b. analyzing the microscopic appearance of tumor cells c. the tumor has spread d. assessing the extent of tumor spread e. treatment involves radiotherapy