According to the endosymbiosis theory, how many membranes should a mitochondrion have?
A. Zero
B. Two
C. One
D. Three
Ans: B. Two
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Many diseases, cancers, and even normal human variations can be caused by mutations and variations in the DNA nucleotide sequence. The most likely immediate result of DNA having a different nucleotide sequence is that
A. the protein resulting from the DNA mutation would be denatured and nonfunctional. B. the peptide bonds in the protein would by hydrolyzed and the protein would fall apart. C. no direct result of change in the protein molecule would occur if DNA is mutated. D. the polypeptide of a protein would be altered. E. the ability for the cell to make proteins would fail.
A ______carrier continues to be infectious during the recovery period
Fill in the blank(s) with the appropriate word(s).
In what ways are hydrogen bonds and ionic bonds similar?
A) Both are based on attraction between atoms that carry differences in electrical charge. B) Both are based on attraction between two atoms that carry negative charges. C) Both are based on repulsion between atoms that carry differences in electrical charge. D) Both involve an even sharing of electrons between atoms. E) Both are based on attraction between two atoms that carry positive charges.
What are the benefits of maintaining biodiversity?
What will be an ideal response?