In Leber's disease (LHON), degeneration of the optic nerve results in blindness due to a defect in NADH dehydrogenase affecting electron transport
If this is due to a mutation in a mitochondrial gene, which combination of the following effects would you expect to see when doing a pedigree analysis of a family with LHON? i. variable expressivity ii. incomplete penetrance iii. progressive blindness over time iv. maternal inheritance v. diminished muscle mass A) i and ii only
B) ii and iii only
C) iii and iv only
D) i, ii, iii, and v only
E) i, ii, iii, and iv only
E
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A. react with other enzymes to form a product. B. catalyze chemical reactions. C. transport molecules and ions across membranes. D. regulate messages between cells.
Which of the following is NOT representative of endocrine glands?
A) They produce hormones. B) They drain into blood vessels. C) They have ducts. D) They drain into lymph vessels.
Which of the following is the correct sequence of events in the origin of life?
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Green and purple sulfur bacteria will carry out anaerobic photosynthesis primarily in
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