Which of the following is TRUE
A. Adhesions are nonfibriular protein at the surface of Gram positive bacteria
B. Biofilm promotes establishing bacterial community and protects it against antibiotics and host defense
C. Pili are filamentous rod proteins that protrude from Gram negative bacteria
D. None of the above are true
E. All of these are true
Ans: E. All of these are true
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Using Chargaff's rules, you can determine that an the DNA of organism that contains 30% adenine would contain ____________ guanine
A. 20% B. 30% C. 40% D. 60% E. 70%
Which of the following is a function or characteristic of initiationfactors that is common to both bacteriaand eukaryotes?
A. bring initiator tRNA to the P site on the small subunit B. bind uncharged tRNA to aminoacyl-tRNA synthetases C. identify the start codon D. release stem loop structures E. catalyze peptide bond formation
Scientists have a very complete fossil record showing the evolution of horses over millions of years, with the legs becoming longer and the teeth larger. These evolutionary changes were from the ancestry horse adapting from living in forests to the modern horse feeding on grasslands. This is an example of
A. gradualism. B. a prezygotic barrier to evolution. C. punctuated equilibrium. D. adaptive radiation. E. extinction.
Which of the following historical figures came up
with the idea of the periodic table? a. Demitri Medeleev b. Niels Bohr c. Louis Pateur d. Robert Koch e. None of these