#Question id: 82
#Unit 1. Molecules and their Interaction Relevant to Biology
The structures of D-ribose and D-arabinose are shown below. These two molecules are
#Question id: 8852
#Unit 9. Diversity of Life Forms
The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely explanation for these data?
#Question id: 5843
#Unit 8. Inheritance Biology
In homologous recombination in E. coli, the protein that assembles into long, helical filaments that coat a region of DNA is:
#Question id: 3697
#Unit 3. Fundamental Processes
In the Meselson-Stahl DNA replication experiment, what percent of the DNA was composed of one light strand and one heavy strand after one generation of growth in 14N containing growth media?
#Question id: 10994
#Unit 7. System Physiology – Animal
When recording lead II on an EKG, the positive electrode is the