Which of the following causes DNA to wrap tightly around histones, essentially shutting down transcription?
A. Methylation
B. Acetylation
C. Nitrogenation
D. Dehydration
E. Carbonation
Answer: A
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The cytoskeleton of plant cells includes:
A. microtubules, microfilaments, and intermediate filaments. B. actin, microfilaments, and intermediate filaments. C. actin, microtubules, intermediate filaments. D. tubulin, microfilaments, and intermediate filaments. E. microtubules and microfilaments.
Define capillaries
What will be an ideal response?
In fungal reproduction, sexual fusion refers to
a. the combining of cells of opposite mating types. b. fusion between spores of different mating types. c. fusion between hyphae from fungi of different mating types. d. fusion between haploid nuclei in a dikaryon. e. the dominance of the haploid phase in the fungal life cycle.
Why does blood move slower in the capillaries compared to the arterioles?
A. Precapillary sphincters close shunting blood into capillaries. B. Capillaries are present in muscles while arterioles are not. C. There are many more capillaries than arterioles. D. Blood pressure is much higher in capillaries than in arterioles. E. Capillaries are much wider than arterioles.