What is the structure and function of a zinc finger protein motif?
What will be an ideal response?
Ans: A zinc finger motif is a DNA-binding domain that is found in many transcription factors. Each zinc finger is a loop of 23 amino acids extending from a site that binds Zn++. The motif usually has several zinc fingers.
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Calcium levels are primarily under the control of ____
a. calcitonin and thyroxine b. prolactin and oxytocin c. prolactin and oxytocin d. parathyroid hormone and thyroxine e. progesterone and ADH
Which of the following examples best describes how geoengineering may help mitigate global climate change?
A. genetically engineering plants to decrease their uptake of carbon dioxide, helping to allow carbon dioxide to be sequestered in the atmosphere B. developing ways to create carbon sources out of the soil and ocean so that carbon is cycled more rapidly C. genetically engineering plants to require more water for photosynthesis to occur D. developing ways to reflect portions of solar energy before they reach the earth, preventing it from contributing to the greenhouse effect
Some members of the Archaea lack a cell wall.
Answer the following statement true (T) or false (F)
Why has the dominant mutant allele for Huntington's disease been able to persist in human populations despite its
devastating effects? a. It has a heterozygote advantage. b. Its symptoms do not typically show until after the individual has had children. c. Its effects are not expressed in heterozygous individuals. d. Its effects are only expressed in homozygous recessive individuals. e. Its effects are only expressed in homozygous dominant individuals.