Answer the following statements true (T) or false (F)
1. The pattern of embryonic expression for a specific gene shown by RNA in situ hybridization and a GFP fusion protein will always be identical.
2. Site-specific recombination systems, such as Flp recombinase/FRT sites, can function only in a single species.
3. A barrier element between a gene and heterochromatin would prevent that gene from being transcriptionally silenced by heterochromatin spreading.
4. Kinetochores include motor proteins that exert pulling forces on spindle microtubules.
5. Both Spo11 and Cas9 are enzymes that create double-strand breaks in DNA.
1. FALSE
2. FALSE
3. TRUE
4. TRUE
5. TRUE
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Which of the following statements is incorrect regarding DNA and RNA?
A. One of the bases is different. B. DNA is double stranded, and RNA is a single strand. C. They each contain a slightly different sugar molecule. D. All of the above are correct.
The transition zone between biomes is called a(n) ecotone. Indicate whether the statement is true or false
Which statement describes an earthworm's digestive opening?
a. It has two digestive openings and no typhlosoles. b. It has two digestive openings and typhlosoles. c. It has a single digestive opening and no typhlosoles. d. It has a single digestive opening and typhlosoles
Fluid-mosaic model describes:
A. Outer membreane B. there is more than one correct answer C. Protoplast fusion D. perplasmic space E. cytoplasmic membrane