A molecule of RNA has 99 phosphodiester bonds connecting ________ ribonucleotides.
Fill in the blank(s) with the appropriate word(s).
100
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The production of chlorophyll molecules requires most plants to obtain __________ from the
soil.
a. calcium b. magnesium c. nitrogen d. potassium
The ____ is/are responsible for closing off the airway during swallowing
a. larynx b. epiglottis c. pharynx d. intercostal muscles e. pleura
Herpes and other enveloped viruses enter their
host cells a. through pores. b. by dissolving the host plasma membrane. c. by fusion of the viral membrane with the cell’s plasma membrane. d. by activating transport proteins in the host cell's plasma membrane. e. any of these
In a cell that has a diploid number of 8 chromosomes, how many chromatids will be present at the beginning of mitosis?
A. 8 B. 16 C. 32 D. 4 E. 2