What was the Avery et al.'s (1944 ) contribution to the understanding of molecular biology?
What will be an ideal response?
a demonstration that DNA is the genetic material in Diplococcus
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If a substance is reduced, it gains electrons
Indicate whether the statement is true or false.
Carbon has an atomic number of 6. Carbon-14 has _____
a. 6 neutrons and 6 protons b. 6 neutrons and 8 protons c. 8 neutrons and 6 protons d. 14 neutrons and 6 protons e. 14 protons and 6 neutrons
Which of the following sequences places the steps of viral replication in the correct order? Assume the virus uses DNA as its genetic material.
a. New viral proteins are synthesized by the host cell ribosome, viral DNA is replicated, virus binds to host cell membrane, new viruses assemble and break out of the cell, viral mRNA is transcribed from viral DNA b. Viral mRNA is transcribed from viral DNA, new viral proteins are synthesized by the host cell ribosome, virus binds to host cell membrane, viral DNA is replicated, new viruses assemble and break out of the cell c. Virus binds to host cell membrane, viral DNA is replicated, viral mRNA is transcribed from viral DNA, new viral proteins are synthesized by the host cell ribosome, new viruses assemble and break out of the cell d. Viral mRNA is transcribed from viral DNA, new viral proteins are synthesized by the host cell ribosome, viral DNA is replicated, new viruses assemble and break out of the cell, virus binds to host cell membrane Viral DNA is replicated, new viruses assemble and break out of the cell, new viral proteins are synthesized by the host cell ribosome, viral mRNA is transcribed from viral DNA, virus binds to host cell membrane
Which of the following mutations would likely be most dangerous to a cell?
A. Deletion of one nucleotide B. Substitution of one nucleotide for another C. Deletion of three nucleotides