Why are deletions or insertions of nucleotides likely to be more detrimental than base substitutions?
What will be an ideal response?
Deletions or insertions of nucleotides lead to frame-shift mutations which alter the rest of the polypeptide after that point. Base substitutions may change an amino acid in a polypeptide chain which could result in a minor change, no change, or a catastrophic change in the polypeptide. Frame-shift mutations, especially occurring early in the nucleotide sequence, are more likely to cause serious consequences.
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Isoelectric focusing separates proteins based on the pH at which they are electrically ________.
Fill in the blank(s) with the appropriate word(s).
Why does the pyramidal cell, above, illustrate the concept of information integration in the nervous system?
A. It has many dendrites and a single axon. B. It has a cell membrane. C. It is an excitable cell. D. It has a nucleus, in which transcription and translation occur. E. It has many dendrites and a single axon; it has a cell membrane; it is an excitable cell; and it has a nucleus, in which transcription and translation occur. F. All of these are parameters of the pyramidal cell that illustrate the concept of information integration.
Which of the following defines a genome?
A) the complete set of an organism's polypeptides B) the complete set of a species' polypeptides C) a karyotype D) the complete set of an organism's genes and other DNA sequences
Sahelanthropus tchadensis
A) the "hobbit people"