Which of the following statements concerning DNA is FALSE?
a. The structure of DNA can be described as a double helix.
b. DNA is a polymer of nucleotides.
c. Purines and pyrimidines are complementary.
d. The sugar present in DNA is ribose.
e. The two chains of DNA are antiparallel.
d
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The publication of the CDC that reports new cases of reportable infectious diseases is titled
A. Morbidity and Mortality Weekly Report (MMWR). B. State Health News Letter (SHNL). C. Federal Report of Infectious Disease (FRID). D. National Morbidity Weekly.
Parasitism usually affects populations in a ____________ manner.
A. density-independent B. density-dependent C. inverse density-dependent D. cyclic E. random
Vinblastine, a drug that inhibits microtubule polymerization, is used to treat some forms of cancer. Cancer cells given vinblastine would be unable to _____
A) form cleavage furrows during cell division B) migrate by amoeboid movement C) separate chromosomes during cell division D) maintain the shape of the nucleus
In what way do mitochondrial mutations influence phenotype?
A) Cells with mutated mitochondrial DNA cannot undergo anaphase. B) They affect the production of ribosomes and protein synthesis. C) Mutated mitochondrial DNA has no effect on phenotypes. D) They cause the nuclear DNA to segregate ineffectively. E) They affect the production of ATP generated through cellular respiration.