At which level(s) of protein structure are interactions between the side chains (R groups) most important?
A. primary
B. secondary
C. tertiary
D. quaternary
Answer: C. tertiary
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Match the kind of plastid with its function.
A) chromosome movement B) flower color C) plastid precursor D) nucleic acid production E) lipid storage F) starch storage G) protein production H) chloride storage I) photosynthesis J) protein storage 1. proplastid 2. amyloplast 3. chloroplast 4. chromoplast 4 elaioplast
Which type of glial cells is involved in the production of cerebrospinal fluid?
a. satellite glia b. astrocytes c. ependymal cells d. Schwann cells
Light-dependent reactions in plants proceed in the _________.
A. thylakoid membrane B. plasma membrane C. stroma D. cytoplasm
In a cell,
a. energy-releasing reactions are coupled to energy-absorbing reactions. b. there are many more energy-absorbing reactions than energy-releasing reactions. c. energy-absorbing reactions and energy-releasing reactions are unlinked. d. energy-absorbing reactions are coupled to energy-releasing reactions via electron carriers. e. more energy is used up than is produced.