Noller’s conclusions from his experiments on ribosomes
a. were accepted immediately by the scientific community
b. showed that the site of peptide bond formation is on rRNAs of the small ribosomal subunit
c. indicated that site of peptide bond formation is on proteins of the small ribosomal subunit
d. showed that the site of peptide bond formation is on rRNAs of the large ribosomal subunit
e. indicated that site of peptide bond formation is on proteins of the large ribosomal subunit
D
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Production of ATP using the energy liberated when electrons from reduced chemical bonds are passed through the electron transport system is generally referred to as
A. chemiosmotic. B. substrate-level. C. respiration. D. conformational change.
In humans and other mammals, X inactivation takes place:
A. early in development, with each new cell inheriting the same inactivated X chromosome as its parent cell. B. late in development, with each new cell inheriting the same inactivated X chromosome as its parent cell. C. throughout the lifetime of an organismâ€"with each new cell division, both X chromosomes are activated, and one is then inactivated in each new cell. D. early in development, with all maternal X chromosomes being inactivated and cells maintaining active copies of only the paternal X chromosome. E. early in development, with all paternal X chromosomes being inactivated and cells maintaining active copies of only the maternal X chromosome.
Which of the following are most susceptible to complement lysis?
A. Gram-positive bacteria B. Gram-negative bacteria C. Bacteriophages D. Prions
The respiratory membrane is a combination of
A) bronchi and air sacs. B) bronchioles and capillary walls. C) alveolar and capillary walls. D) bronchi and bronchioles. E) bronchioles and air sacs.