The final electron acceptor in the electron transport chain system is _______
Fill in the blank(s) with the appropriate word(s).
oxygen
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Instead of the typical XY pairing, some males may have an XXY chromosome configuration that may result in ________.
A. Klinefelter syndrome B. Down syndrome C. Fragile X syndrome D. Prader–Willi syndrome E. None of the above
Which of the following best describes the tRNA binding sites of the ribosome?
A. Only one of the three sites can be occupied by a tRNA molecule at any given time. B. Each tRNA that associates with the ribosome must first bind in the P site and then move to the A site. C. The P site contains the tRNA molecule covalently bound to the growing chain of amino acids. D. All tRNAs leave the ribosome through the A site.
Soil nutrients that are leached from soils into ponds or other bodies of water can contribute to such phenomena as:
A. overproduction of water plants that could block waterways B. excess growth of certain algae C. loss of those nutrients for plant growth D. reduced fertility of the soils E. All of these could be true
A seed is a _____
a. female gametophyte c. mature pollen grain b. mature ovule d. modified microspore