The primary structure of a protein is directly associated with ______
A. regular repeating shapes, such as beta-sheets
B. the three-dimensional shape of the protein
C. the linear sequence of the amino acids
D. the interaction of two or more peptide chains
C
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When comparing the gene coding for cytochrome c in several species, it was noted that humans and
chimpanzees share the identical amino acid sequence with a change in only one location. This means that a. humans and chimpanzees can mate and produce viable offspring. b. humans evolved from chimpanzees. c. over time, chimpanzees will eventually evolve into primitive humans. d. humans and chimpanzees are closely related in evolutionary time. e. there is nothing particularly informative about this discovery.
What kinds of cells are produced by meiosis in flowering plants?
a. diploid sporophytes b. haploid sporophytes c. haploid gametophytes d. diploid gametophytes
An atom has 20 electrons and 20 neutrons. What is the mass of this atom?
A. 20 B. 10 C. 40 D. 80
Which statement is NOT correct about the results of the Hershey-Chase experiment with the T2 virus?
a. Radioactively labeled protein was found in the bacteria, not in the virus coats. b. Radioactively labeled DNA was found in the bacteria, not in the virus coats. c. DNA was labeled with radioactive phosphorus. d. Protein was labeled with radioactive sulfur. e. Two separate experiments were actually run, one with radioactive phosphorus and one with radioactive sulfur.