DNA ligase binds
A) recombinant DNA to transformed bacterial cells.
B) recombinant DNA to recombinant proteins.
C) nucleotides in the DNA backbone together.
D) nucleotide base pairs from opposite strands together.
Answer: C
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Which of the following is an example of post-translational modification? (Select all correct choices)
A. Digestive proteins are translated into inactive forms that can be activated at a later time and/or in a different place. B. Chaperone proteins help newly translated proteins achieve the appropriate tertiary structure. C. Proteins are modified by the replacement of one or more amino acids by sugars, which may then target the protein to a specific cell compartment.
Which of the following statements accurately describes the Calvin cycle?
A) It is a carbon assimilation process. B) In this process, carbon dioxide is reduced to organic sugars. C) It occurs in the chloroplast stroma. D) The Calvin cycle is a means of carbon fixation. E) all of the above
Lysozyme
a. is secreted by endocrine glands in the skin. b. destroys the cell wall of invading bacteria. c. is produced in the lymph nodes and actively disables bacteria. d. is a very effective defense against viruses. e. is active within the circulatory system.
Which of the following is not one of the requirements that must have existed for the chemical
evolution of life on Earth to have occurred? a. a source of energy b. availability of chemical building blocks c. oxygen (O2) d. time e. carbon dioxide