Ascientist observers an enzyme polypeptide chain arranged in spiral turns that rise upward and are held in place by hydrogen bonds. which level is structure arrangement is he looking at?

Barbara is converting 78°f to degrees celsius. first, she subtracts 32 from 78. what is the next step?

Select the correct answer. tay-sachs disease is caused by a mutation in the hexa gene located on chromosome 15. tay-sachs follows an autosomal recessive pattern of inheritance. with the of the diagram, identify which of the offspring will be an unaffected carrier. a diagram showing the genes of parents who are carriers of tay-sachs disease a. a, b, and c b. b and c c. a and d d. a e. d

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis