In the diagram, what is the basic functional unit of a myofibril?
a) B
b) C
c) F
d) Both B and C
e) All of these choices are correct.
c
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The direct transfer of heat energy from one object to another through physical contact is called
A) radiation. B) conduction. C) convection. D) evaporation. E) transmission.
What is the function of ATP molecules in living cells?
A) They capture energy from the oxidation of fuels in their high-energy phosphate bonds, and the energy is used in various cell processes. B) They act as coenzymes so that fats can be synthesized. C) They form a genetic material. D) They are an integral part of the cell membrane, important in transporting water molecules.
This figure shows the spinal cord and spinal nerves. What structure does number 1 indicate?
A. Posterior rootlets B. Dura mater C. Cauda equina D. Conus medullaris E. Filum terminale
Two or more polypeptides chains combine to form a complex structure called a ________
A) primary structure B) beta-pleated sheet C) secondary structure D) tertiary structure E) quaternary structure