Which of the following is true about bacteria?
a. some bacteria have nuclei
b. some bacteria have lipid bilayers enclosing
their DNA
c. some bacteria do not have DNA
d. some bacteria do not have a cytoplasm
e. some bacteria lack a plasma membrane
B
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Cancers of glands or their ducts are called ____
a. sarcomas b. leukemias c. gliomas d. lymphomas
e. adenocarcinomasYou, as a cell biologist, discover that there is strong evidence that chloroplasts, found in plant and algal cells, are descended from bacteria but not eukaryotes. What theory would explain this finding?
A) macroevolution B) endosymbiont C) back to front D) bottleneck
Which of the following processes actually produces a significant quantity of ATP?
a. pyruvate oxidation b. glycolysis c. oxidative phosphorylation d. the citric acid cycle
A DNA molecule containing 32% thymine would contain how much cytosine?
A. 18% B. 36% C. 32% D. 64%