Which of the following DNA regions is recognized by RNA polymerase during transcription?
A) promoter
B) operator
C) attenuator
D) leader
E) structural gene
Answer: A
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What system reclaims fluids and proteins that have escaped from blood capillaries?
a. cardiovascular b. pulmonary c. lymphatic d. sinoatrial e. venous
The sequence of nitrogen-containing bases on one strand of DNA most directly determines the sequence of
A) sugars in a polysaccharide molecule. B) amino acids in a protein molecule. C) fatty acids in a fat molecule. D) bases in a protein molecule.
The human brain's center for thought and association is the
A. hypothalamus. B. thalamus. C. cerebrum. D. cerebellum.
Which of these cell surface proteins interact directly with antigens during the adaptive immune response?
a. immunoglobulins b. T cell receptors c. MHC proteins d. all of the above