In mapping the HD gene associated with Huntington disease, eventually researchers narrowed down their hunt to four candidate genes within the mapped region. How did they identify one of these as the definitive HD gene?
What will be an ideal response?
polymorphisms (in HD patients)
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The granules of neutrophils contain ________.
A. histamine B. antigens C. digestive enzymes D. peroxidase E. antibodies
Figure 10.1 shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis. Why are they different?
A) Green and yellow wavelengths inhibit the absorption of red and blue wavelengths. B) Bright sunlight destroys photosynthetic pigments. C) Oxygen given off during photosynthesis interferes with the absorption of light. D) Other pigments absorb light in addition to chlorophyll a. E) Aerobic bacteria take up oxygen, which changes the measurement of the rate of photosynthesis.
Ribosomes are found free within the cytoplasm as well as bound to rough endoplasmic reticulum. They are the sites of
A) photosynthesis. B) digestion. C) protein synthesis. D) energy production.
Which of the following is NOT a step in bacterial cell division?
a. Disappearance of nuclear envelope b. Splitting apart of two new daughter cells c. Cell elongation d. Replication of the genetic material