The first codon to be deciphered was ________, which codes for ________.
A. GGG; alanine
B. CCC; glycine
C. TTT; arginine
D. UUU; phenylalanine
E. AAA; proline
Answer: D
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The major opposition to the Extraterrestrial Hypothesis is
A. not enough organic carbon molecules could have been transported to the Earth's surface by comets and asteroids. B. most organic carbon molecules, including nucleic acids and amino acids, would have been destroyed by the intense heating that occurs when large bodies fall through the Earth's atmosphere. C. not enough comets and asteroids hit the Earth to deliver organic carbon molecules to the surface. D. most of the organic carbon molecules would have fallen into the seas, helping life form in the water but not on the land. E. without oxygen in the atmosphere the organic carbons that did fall would have been rapidly reduced to inorganic carbon compounds.
Which of the following adhesive molecules are found in animal tissues?
A. cadherins and integrins B. pectins C. cadherins D. integrins E. cadherins, integrins, and pectins
What bone serves to anchor the tongue and muscles used for swallowing?
A. sternum B. temporal bone C. hyoid bone D. mandible
The Hardy-Weinberg law can be used to calculate allele and genotype frequencies without genetic testing
a. True b. False