Producers are at which trophic level?
a. first
b. second
c. third
d. fourth or higher
e. The level varies with different ecosystems.
a
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In order for transcription to be initiated
A. DNA polymerase must have access to the DNA double helix and must also be capable of binding to the gene's promoter. B. RNA polymerase must have access to the DNA double helix and must also be capable of binding to the gene's promoter. C. DNA polymerase must have access to the RNA and must also be capable of binding to the gene's promoter. D. RNA ligase must have access to the DNA double helix and must also be capable of binding to the gene's promoter. E. RNA polymerase must have access to the DNA double helix and also must be capable of binding to the gene's operator.
What is the main difference between the haploid and diploid phases of animal and plant life cycles?
What will be an ideal response?
What are the steps (in the correct order) that link a change in the base sequence of a gene to a change in the phenotype of an organism like a mouse or a human?
A. RNA—>DNA—>Protein B. DNA—>RNA—>Protein C. DNA—>Protein—>RNA D. Protein—>RNA—>DNA
The two polynucleotide chains in a DNA molecule are attached to each other by
A) covalent bonds between carbon atoms. B) covalent bonds between phosphates and sugars. C) peptide bonds between amino acids. D) hydrogen bonds between bases. E) ionic bonds between "R" groups in amino acids.