Whether one atom will bond with another depends
on the element and the number and arrangement of
its
a. protons.
b. neutrons.
c. electrons.
d. neutrinos.
e. pions.
Answer: c
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When cancer cells have the ability to migrate to other parts of the body, they are said to be
A. invasive. B. benign. C. metastatic. D. oncogenic. E. genetic.
What type of molecule activates cytotoxic T lymphocytes?
A) perforin B) cytokines released from T helper cells C) antibodies D) antigen presented with MHC I
Below is a list of molecules with different chemical characteristics
Knowing that all molecules will eventually diffuse across a phospholipid bilayer, select the option below that most accurately predicts the relative rates of diffusion of these molecules (fastest to slowest). alanine estrogen propanol sodium (a) alanine > propanol > sodium > estrogen (b) sodium > propanol > alanine > estrogen (c) estrogen > propanol > sodium > alanine (d) estrogen > propanol > alanine > sodium
Identify the role(s) of ATP in muscle contraction.
A. Binds to the troponin complex to expose myosin-binding sites B. Provides the energy to convert myosin to a form that forms a cross-bridge with actin C. Binds to myosin to break an actin-myosin cross-bridge