Which genetic disorder is associated with an irregular shape of the red blood cells?
What will be an ideal response?
sickle cell disease
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Which type of mutation substitutes one amino acid for another?
A) nonsense B) missense C) sense D) antisense
Researchers exposed Caenorhabditis elegans to bacteria, which caused the parasite to use sexual reproduction instead of asexual reproduction. What advantage did C. elegans have in using sexual reproduction over asexual reproduction?
A. The offspring were unique, giving the roundworms a better chance of survival. B. The offspring were identical, giving the roundworms a better chance for survival. C. The offspring wer identical, giving the bacteria a greater chance to kill the entire population. D. The offspring were unique, giving the roundworms a more energy-conserving type of reproduction. E. All of the answer choices are correct.
An Rh-negative mother will need a special treatment if she gives birth to an Rh-positive baby. The treatment involves the destruction of any stray blood cells from the baby that pass into the mother's bloodstream. Why is this necessary?
A) The mother's immune system will attack the Rh-positive cells and produce antibodies that will attack a fetus in a subsequent pregnancy. B) The mother's immune system will attack her own blood cells and the cells in the fetus of a subsequent pregnancy. C) Without this treatment, the mother's immune system will attack only her own blood cells. D) Without this treatment, antibodies will be formed in breast milk, which could harm the baby.
Human skin cells and human white blood cells of the immune system both perform protective functions. Skin cells function primarily in external physical protection, whereas white blood cells function primarily in internal protection. Nonetheless, both
types of cells contain a complete copy of the human genome. Explain how cells can have the same genetic information and yet perform different functions. What prevents skin cells from making all the same proteins of a white blood cell? What will be an ideal response?