DNA is associated with proteins, forming a complex called:a

chromosomes.
b. nucleoli.
c. nucleus.
d. genes.
e. chromatin.


E

Biology & Microbiology

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When the Catabolite Activator Protein binds to its binding site in DNA, it

A. bends the DNA. B. eliminates the need for a sigma factor on the part of RNA polymerase. C. promotes the assembly of other transcription factors at the promoter. D. displaces repressors.

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Which of the following is NOT a main function of B lymphocytes?

A) To produce an antibody B) To present pathogens C) To digest pathogens D) To activate T-lymphocytes E) To produce interleukins

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Metabolic pathways are designed to synthesize necessary cellular reagents as required for cellular and tissue function. To accomplish this, the reaction sequence _______.

a) does not include reactions for which the reverse reaction is significant b) includes both reactions that are essentially irreversible and reactions that are freely reversible (near equilibrium). c) utilized only chemical reactions that are energetically favorable (delta G is negative) under the conditions when synthesis is occurring. d) does not include reactions that are near equilibrium

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Which of the following is mismatched?

A) pharyngitis — sore throat B) laryngitis — voice loss C) epiglottitis — sore throat D) sinusitis — headache and nasal mucous E) otitis media — earache

Biology & Microbiology