Except during initiation of translation, transfer RNA molecules carrying amino acids initially bind to the ribosome at the (P/A/E) site
What will be an ideal response?
A
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With minor exceptions, the genetic code ____
a. is the same for all living organisms and viruses b. is specialized so that viruses use a different code than all living organisms c. differs between different organisms and viruses d. is the same for all viruses and for single-celled organisms, but is more complex in multicellular organisms e. has three versions: one for viruses, one for single-celled organisms, and one for multicellular organisms
The founder effect differs from a population bottleneck in that the founder effect ________.
A. is a type of natural selection B. can occur only on an oceanic island colony C. involves the isolation of a small colony of individuals from a larger population D. requires a small population
If you placed a red blood cell in a solution that contains less solute than the cell, you would predict that its volume would ________ while the solute concentration in its cytoplasm would ________.
A. decrease; decrease B. increase; increase C. decrease; not change D. decrease; increase E. increase; decrease
What makes phospholipid membranes good at keeping some molecules out, and allowing others to freely pass?
a. They are positively charged. b. They are completely hydrophobic. c. They are completely hydrophilic. d. They have both hydrophilic and hydrophobic regions.