RNA polymerase: () A: binds tightly to a region of DNA thousands of base pairs away from<br/>the DNA to be transcribed. B: can synthesize RNA chains without a primer. C: has a subunit called λ (lambda), which acts as a proofreading<br/>ribonuclease. D: separates DNA strands throughout a long region of DNA (up to<br/>thousands of base pairs), then copies one of them. E: synthesizes RNA chains in the 3' →direction.