Which scientist(s) discovered the basis for the basepair
rule, which states that the amounts of adenine
and thymine match, as do the amounts of cytosine
and guanine?
a. Avery
b. Griffith
c. Chargaff
d. Hershey and Chase
e. Pauling
Answer: c
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To truly begin to understand nature, we must study and understand:
A. molecules. B. cells. C. organisms. D. ecosystems. E. The study of nature requires an integrated approach that considers molecules, cells, organisms, and ecosystems.
The branches of the trachea that enter each lung are the ____
a. pharynx b. vocal cords c. bronchi d. larynx e. epiglottis
Which type of RNA molecule contains the genetic code of a gene that is read by ribosomes during translation?
A) rRNA B) tRNA C) siRNA D) mRNA E) miRNA
What is true regarding antigens?
A. The most effective antigens are small simple amino acid complexes. B. Bacteria do not contain antigens. C. A large antigen is likely to have many different epitopes, each of which can stimulate a distinct immune response. D. An antigen is a molecule that promotes a general immune response. E. Antigens can only be recognized by their lipid moieties.