Amniocentesis involves
A) prenatal diagnosis of genetic defects in a fetus.
B) tests for enzyme and protein deficiencies in a fetus.
C) taking a sample of amniotic fluid with a needle.
D) analysis for DNA and chromosome defects in a fetus.
E) All of these
E
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You are asked to determine whether an unknown tissue specimen comes from a plant or an animal
Closer inspection with an electron microscope reveals that the cells are connected by small openings lined by extensions of the cell membrane and containing tubules connecting the endomembrane systems of adjacent cells. Which of the following conclusions can be drawn from your observations? A. The openings are plasmodesmata, so the tissue must come from a plant. B. The openings are plasmodesmata, so the tissue must come from an animal. C. The openings are gap junctions, so the tissue must come from a plant. D. The openings are gap junctions, so the tissue must come from an animal. E. The openings could be either gap junctions or plasmodesmata, so it cannot be determined whether the tissue came from a plant or an animal.
Which compound has the highest free energy and produces the most ATP per molecule when oxidized?
A. acetyl CoA B. pyruvate C. carbon D. lactate E. glucose
________is formed when atom gained or loose electrons.
a. molecule b. isotops c. ions
Osteogenesis imperfecta is a rare human condition caused by a mutation in a gene encoding Type I collagen. In some forms of the disease, the mutation leads to the production of procollagen that has a defective extension sequence; this defect interferes with the assembly of functional collagen fibers. Which of the following symptoms would you expect to see in individuals with osteogenesis imperfecta?
A. thin discs between vertebrae B. defective kidneys and capillaries C. very strong tendons and ligaments/tight joints D. very weak bones E. respiratory problems/lung defects