Organisms that manufactures their own food are known as:
a. secondary consumers
b. autotrophs
c. primary consumers
d. heterotrophs
e. herbivores
b
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In choosing the vector used to carry human genes into a host cell, which of the following should be the important consideration?
A. Whether the vector contains RNA or DNA B. Whether the vector comes from a bacterium or a virus C. What kind of plasmid it is D. How much donor DNA can be carried on the vector
A(n) _____ infection occurs when several infectious agents establish themselves simultaneously at the infection site
Fill in the blank(s) with the appropriate word(s).
Physicians are required to report new cases of gonorrhea to the CDC, whereas new cases of genital herpes are not notifiable. Evaluate the statements below and choose which statement best represents why some diseases are reportable and others are not.
A. Gonorrhea is more contagious than genital herpes. B. Gonorrhea affects certain populations and geographic areas, whereas genital herpes does not. C. Genital herpes is less deadly than gonorrhea. D. Gonorrhea is treatable with antibiotics and therefore may develop resistance; genital herpes is not treatable with antibiotics.
Why do all enzymatic reactions need activation energy?
a. Energy is required to disrupt a substrate's stable electron configuration. b. Energy allows only the substrate to bind. c. Energy is needed for the enzyme to find its substrate. d. Energy is required by an enzyme so that it can be reused.