Which of the following is considered to be a strong base (alkali)?
A) HCl ? H+ + Cl-
B) NH3 + H+ ? NH4+
C) H2CO3 ? HCO3- + H+
D) NaOH ? Na+ + OH-
Ans: D) NaOH ? Na+ + OH-
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Which of the following is a eukaryotic characteristic?
A) cell fission B) membrane-bounded nucleus C) little processing of RNA D) 70S ribosomes E) none of the above
What is the main difference between covalent and ionic bonds?
a. Ionic bonds share electrons between atoms, while covalent bonds transfer electrons between atoms. b. Covalent bonds share electrons between atoms, while ionic bonds transfer electrons between atoms. c. Ionic bonds form between hydrogen and other atoms, while covalent bonds do not use hydrogen. d. Covalent bonds form between hydrogen and other atoms, while ionic bonds do not use hydrogen.
Which of the following is a characteristic of K-selected species?
a. Adapting to stable environments b. Having a high number of offspring c. Offering minimal parental care d. Providing no resources to their offspring
What is a cloning vector?
A. an agent, such as a plasmid, used to transfer DNA from an in vitro solution into a living cell B. the sticky end of a DNA fragment C. the laboratory apparatus used to clone genes D. a DNA probe used to locate a particular gene in the genome E. the enzyme that cuts DNA into restriction fragments