Transfer RNA differs from other types of RNA because it
a. transfers genetic instructions from cell nucleus to cytoplasm.
b. specifies the amino acid sequence of a particular protein.
c. carries an amino acid at one end.
d. contains codons.
e. has different bases in its nucleotides.
C
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The spread of pathogens through the blood and lymph systems that results in a bloodborne systemic infection is called
A) bacteremia. B) cancer. C) pathogenesis. D) septicemia.
In eukaryotes, which topoisomerases can relax negative supercoiling?
A. topoisomerase I B. topoisomerase II? C. topoisomerase II? D. type II topoisomerases only E. All these topoisomerases can relax negative supercoiling.
You engineer an XY mouse in which the SRY gene is inactivated. What do you expect to observe in this mouse?
A) The mouse will develop male anatomic features. B) The mouse will develop female anatomic features. C) The mouse's Y chromosome will convert into an X chromosome. D) The mouse's X chromosome will convert into a Y chromosome. E) The mouse will exhibit both male and female morphological features.
Assuming that that rate of carbon dioxide uptake is the rate-limiting step in photosynthetic growth, which algal species will grow faster if the concentration of carbon dioxide is: 5 mM? 100 mM? 2000 mM?
Two algal species utilize different transport proteins to take up carbon dioxide for use in photosynthesis. The kinetics of carbon dioxide uptake by the transport proteins in species A and B are different: Species A Species B Km 1000 mM 10 mM Vmax 1000 mmol/min 100 mmol/min