All of the following are found in the Gram-Positive Bacteria cell EXCEPT
A. Lipid A
B. Lipoteichoic acid
C. Peptidoglycan
D. Teichoic acid
Answer: A. Lipid A
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In the Hershey-Chase experiment, bacterial viruses, called phage, were used to demonstrate that DNA is the genetic material. The phage that were used for this experiment consisted of DNA surrounded by a protein coat. Phage will attach to specific types of bacteria and inject their DNA into the bacterial cell. To scientifically determine whether DNA is the genetic material, Hershey and Chase made
phage in a medium containing radioactive sulfur-35 (S35). Why was S35 used in this experiment? A. Only amino acids contain sulfur. B. Only nucleic acids contain sulfur. C. Both nucleic acids and amino acids contain sulfur. D. The radioactive sulfur labels peptide bonds.
If a species is found in only one location on Earth, it is referred to as what?
a. primordial species b. endemic species c. biogenesis species d. pandemic species
Which of the following is NOT a part of the
cell theory?
a. All organisms are cellular. b. Cells are the structural and functional units of life. c. All cells come from preexisting cells. d. All cells are approximately the same size. e. All cells have inheritable material
During photosynthesis in a leaf, sugars are loaded into the sieve tube by _____ followed by ______ to increase the pressure.
A. osmosis, facilitated diffusion B. facilitated diffusion, osmosis C. gravity, active transport D. active transport, osmosis E. osmosis, gravity