When analyzing the sequence of genes similar to ones already known, why is the amino acid sequence of the protein more important than the DNA sequence?
What will be an ideal response?
Answer: Over evolutionary time, a nucleotide sequence can change, yet its encoded protein function can remain the same. Individual nucleotide changes especially at the third position of a codon might not change the amino acid sequence at all. Depending on the location of the amino acid, some can substitute for others and not affect the protein's function. Therefore a nucleotide sequence could be quite different from another, yet their function could remain the same.
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a. A only b. B only c. C only d. D only e. both A and B
Which group of organisms is not classified as ectotherms? a. All of these choices are ectotherms
b. Fish c. Amphibians d. Lizards e. Mammals
As a consequence of red blood cells' lack of nuclei and other organelles, they ________
A) have more room to carry hemoglobin B) have a small surface area C) contain less hemoglobin than they might otherwise be able to carry D) can carry more calcium
Which of the following viruses are oncogenic?
A) parvovirus B) human herpesvirus 4 C) papillomavirus D) both human herpesvirus 4 and papillomavirus E) both parvovirus and human herpesvirus 4