Which of the following individuals is most likely to have the greatest bone density?
A) A person who walks 30 minutes a day
B) An astronaut who has been in space for an extended time
C) A person who has been chronically ill and in bed
D) A computer programmer
A
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In sweet peas, genes C and P are necessary for colored flowers. In the absence of either (__ pp or cc
__) or both (cc pp), the flowers are white. Give the probable genotype of a plant with colored flowers and a plant with white flowers that produced 38 plants with colored flowers and 42 plants with white flowers. What will be an ideal response?
When Mendel crossed heterozygotes for flower color and seed color, what proportion of the offspring had both dominant phenotypes?
A) 1/3 B) 3/4 C) 1/16 D) 3/16 E) 9/16
Why are denatured enzymes no longer functional?
A. Denatured enzymes lose the secondary and tertiary structures that determine the correct shape of the active site. B. Denatured enzymes are no longer functional because the bonds between amino acids are broken. C. Denatured enzymes cannot dissociate from a chemical reaction's products. D. Denatured enzymes only work at extremes of pH that are not conducive to most organisms.
In sickle cell anemia, what happens to the hemoglobin molecule that causes the red blood cell to sickle?
a. a small part of it becomes hydrophobic b. a small part of it becomes hydrophilic c. a small part of it becomes polar d. a small part of it becomes negatively charged e. a small part of it becomes positively charged