When glucose molecules are joined together by ? 1-4 or ? 1-6 linkages, what polymer is the product?
a. glycogen
b. cellulose
c. starch
d. sucrose
c. starch
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Who proposed that the structure of DNA is a double helix with two polynucleotide chains running in opposite directions and held together by hydrogen bonding between pairs of nitrogenous bases?
A. Hershey and Chase B. Chargaff C. Franklin D. Watson and Crick E. Meselson and Stahl
An untied inflated balloon flies because
(a) the pressure is higher inside than outside the balloon. (b) the pressure is lower inside than outside the balloon. (c) air flows down its pressure gradient. (d) both a and c occur.
Which of the following does NOT add carbon dioxide to the atmosphere?
a. forest fires b. decomposers c. burning of fossil fuels d. photosynthesis e. decomposer respiration
The contributions of genes and environmental factors are strictly defined during the study of complex traits
a. True b. False