Which of the following is a part of the first law of thermodynamics?
a. Energy can be neither created nor destroyed.
b. Energy cannot be transformed.
c. The entropy of the universe is constant.
d. The entropy of the universe is decreasing.
e. Potential energy is the energy of motion.
A
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A doctor discovers that her patient can produce antibodies against some bacterial pathogens, but he is unable to protect himself against viral infections. The doctor suspects a disorder in her patient's
A. B cells. B. plasma cells. C. cytotoxic T cells. D. suppressor T cells. E. macrophages.
A digestive system with _____ is able to carry out various tasks of digestion at once
a. bilateral symmetry b. collar cells c. a one-way tube, a mouth, and an anus d. radula e. a two way sac-like cavity
A bacteriophage transfers a random fragment of DNA of the previous host to the current host. This is an example of
A. the creation of an Hfr cell. B. generalized transduction. C. conjugation. D. specialized transduction.
AMP-PNP is a non-hydrolyzable analog of ATP that can bind to proteins in a similar manner as ATP but is no longer hydrolyzed. Predict what would happen to helicase activity if AMP-PNP were added to a DNA replication reaction.
A. Helicase would no longer function, since the AMP-PNP is not hydrolyzed. ATP binding and hydrolysis induce the conformational changes that facilitate DNA unwinding by helicase. B. Helicase would function normally, since AMP-PNP is not the same as ATP and would not bind to helicase. C. Helicase would function faster than normal, since the AMP-PNP is not hydrolyzed. ATP binding induces conformational changes, but hydrolysis slows DNA unwinding by helicase. D. Helicase would function normally, since AMP-PNP is an analog of ATP and would function in the place of ATP.