The photosynthetic production of one molecule of glucose requires ________ molecule(s) of ATP.
A. 18
B. 12
C. 6
D. 24
Answer: A
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Evidence of a direct relationship between genes and enzymes, including development of the one geneone
enzyme hypothesis, came from studies conducted by ____ of arginine biosynthesis in mutant stains of Neurospora.
a. Beadle and Tatum b. Griffith c. Watson and Crick d. Garrod e. Nirenberg and Leder
Some intercellular regulatory molecules that exert only very local effects are called ________ regulators.
A. sympathetic B. exogeneous C. merocrine D. endocrine E. paracrine
Several organisms have a homologous protein (inherited from a common ancestor) that is highly similar at the amino acid level. You are comparing the genes that code for these proteins in the different organisms when you note that one of the codon nucleotide positions shows more nucleotide variation than the other nucleotide positions. In which codon nucleotide position do you expect to see the most variability among species?
A. first nucleotide position B. second nucleotide position C. fourth nucleotide position D. third nucleotide position
__________ behavior can occur without having been learned by experience.
Fill in the blank(s) with the appropriate word(s).