Which of the following is true of ?-independent termination of transcription?
A. It relies on the production of an RNA transcript with self-complementary sequences.
B. It utilizes a hexameric helicase.
C. RNA polymerase stalls at a specific sequence of GC base pairs.
D. It occurs when the sigma subunit dissociates from the polymerase.
E. It requires ATP hydrolysis.
A
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Identify a sequence that is most likely to be recognized by a restriction enzyme.
A. CGATGC B. CCCTTT C. TGGCCA D. TCATCA Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about restriction enzymes? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which one of the following statements about transposable elements is correct?
A. They replicate themselves and insert themselves into new positions. B. They are sometimes described as selfish and called the ultimate parasite. C. They make up 45% of the DNA in the human genome. D. They can transpose via DNA replication or an RNA intermediate. E. All of the answer options are correct.
Which of the following is an advantage of
having a four-chambered heart?
a. only oxygen-rich blood flows to tissues b. blood pressure in the separate circuits is not independently controlled c. two separate circuits are possible d. only with a four-chambered heart are lungs possible e. more than one of these is an advantage to having a four-chambered heart
Some American soldiers serving in Iraq have become infected with a skin disease caused by a protist called Leishmania, which is transmitted by sand flies. The Leishmania organism bears flagella with a unique crystalline rod structure. One of its life stages is squiggly and worm-like in appearance, much like its relative in the same group, Trypanosoma. Leishmania belongs to the group __________.
Fill in the blank(s) with the appropriate word(s).