Genetic material, DNA and RNA, are found in three distinct organelles in eukaryotic cells, what are these organelles and which type of relationship may have lead to their formation?
A. Chloroplast, mitochondria, nucleus, endosymbiotic.
B. Chloroplast, lysosomes, nucleus, endosymbiotic.
C. Nucleus, Golgi body, endoplasmic reticulum, symbiotic.
D. Mitochondria, chloroplast, nucleus, parasitic.
E. Lysosomes, mitochondria, chloroplast, parasitic.
A. Chloroplast, mitochondria, nucleus, endosymbiotic.
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Ultraviolet light damages DNA by causing
A) purine rings. B) strand breaks. C) thymine dimers. D) radioactivity.
What characterizes diverticulitis?
A) inflamed blood vessels B) hard accumulating feces C) a cramping muscularis muscle D) Food collecting in mucosa pouches
A chronic, local allergy such as hay fever is considered ________.
A. systemic anaphylactic B. atopic C. delayed D. T-cell-mediated E. antibody-mediated
The rate at which mitosis occurs varies dramatically for different types of cells. The most rapid cell division occurs:
a) in the blood and the heart. b) on the skin. c) in the gametes. d) in the blood and the cells lining the various tissues of organs. e) in the liver and the brain.