The two strands of DNA are:
A. Parallel and complementary
B. Anti-parallel and complementary
C. Parallel and identical
D. Anti-parallel and identical
Answer: B. Anti-parallel and complementary
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Which type of disease is LEAST likely to be able to be treated using genome editing with TALEN or CRISPR?
A. Trisomy-21 B. Leukemia C. Cystic fibrosis D. Huntingtons Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about genome editing? 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?
You have made a smear of a bacterial culture and have performed the Gram stain on it. Looking at the organism under the microscope, you notice that the cells do not seem to be the dark blue-purple of a gram-positive reaction, but instead are light purple. Your staining procedure was performed correctly. What is your best explanation as to why the bacteria have stained this way?
A. The specimen did not undergo heat fixation before staining; therefore, the primary dye does not stick properly to the wall. B. These are mutant bacteria which cannot be stained like other bacteria. C. The bacteria were taken from an inappropriate medium, and a chemical is interfering with proper staining of the cells. D. There is something in the wall of the bacteria that has affected the uptake of the crystal violet into the cell wall, thereby staining it improperly.
After Noller and colleagues performed the fragment reaction, which of the following treatments did
not allow transfer of the met* to puromycin?
a. no treatment b. removing proteins c. digesting proteins d. removing rRNA e. all of these allowed the transfer
Artemia, brine shrimp
a. are aquatic organisms. b. live in salty ecosystems. c. are filter-feeding primary consumers. d. are all of the above..