Viruses can cause cancer in a host cell by ____
a. disrupting the plasma membrane
b. altering the DNA
c. slowing its metabolism
d. destroying the nucleus
e. removing gene sequences
ANSWER: b
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A plant cell with 64 available ATP molecules could split how many N2 molecules with the assistance of nitrogenase?
A. 2 B. 4 C. 16 D. 32 E. 64
The organism Caenorhabditis elegans, a member of the phylum ____, is an important model organism
for studies of the genetic control of development.
a. Arthropoda b. Onychophora c. Nemertea d. Annelida e. Nematoda
The ____ system is responsible for mineral storage in the body
a. circulatory
b. digestive c. respiratory d. skeletal e. urinary
The blending of two or more kinds of molecules is a(n)____
a. compound b. isotope c. reactant d. mixture e. chemical bond