Which one of the following represents the pH of a solution with the highest concentration of hydrogen ions?
A. 1.0
B. 4.5
C. 7.0
D. 9.1
E. 11.5
Answer: A
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Before ARF transcription factors can trigger auxin-induced gene expression, what must happen?
A. Auxin binds to ubiquitin, a degradation tag. B. Auxin degrades Aux/IAA proteins which repress ARF transcription factors. C. Auxin binds to TIR1, an auxin receptor. D. Auxin must bind to the ARF transcription factor. E. Ubiquitin must destroy TIR1 to release Aux/IAA proteins.
Answer the following statements true (T) or false (F)
1. Genetic drift is when an individual from one population is introduced into a new population, introducing new alleles. 2. The presence of the traces of pelvic bones in both whales and snakes indicate that they descended from an ancestor that once had legs. 3. The theory of evolution can accurately explain the origin of life on Earth. 4. Organisms can have forms that look similar but come from very different evolutionary ancestors. 5. The fact that mitochondria cannot live outside of the cell suggests that ancestral cells engulfed and kept alive free-living prokaryotic anaerobes.
The building blocks of nucleic acids are
a. amino acids. b. nucleotides. c. pentose sugars. d. phosphate groups. e. nitrogenous bases.
Name the four most important groups of biological molecules necessary for life. List one polymer and one monomer of each
What will be an ideal response?