Propose why it would be advantageous for a photosynthetic microorganism to have more than one type of chlorophyll or bacteriochlorophyll
What will be an ideal response?
Answer: Each type of chlorophyll or bacteriochlorophyll absorbs different wavelengths of light, so additional types of chlorophyll can take advantage of more photons to produce even more energy.
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Which of the following statements about transcriptional regulation is incorrect?
A. Regulatory transcription factors are proteins that bind to enhancer DNA sequences and then recruit one or more general transcription factors. B. A typical gene contains only one enhancer sequence. C. General transcription factors are required to initiate the process of transcription. D. General transcription factors bind to the TATA box in the promoter region of a gene. E. RNA polymerase components are recruited to the promoter region by the general transcription factors bound to the TATA box.
Which of the following is considered a reverse mutation that will restore the wild type phenotype?
A. A mutation that restores the function of a protein even though it does not restore the base sequence or the amino acid sequence to the wild type. B. True reversion back to the wild type base sequence. C. Mutation to a different base sequence, but one that restores the amino acid sequence in the protein to the wild type sequence. D. All of the choices are correct.
For the first few days after birth, the mammary glands produce a pale fluid rich in proteins, antibodies,
minerals and vitamin A known as a. lanugo. b. meconium. c. colostrum. d. surfactant. e. premilk.
Global warming is the result of
A) rising ocean levels. B) rising concentrations of greenhouse gases. C) increased solar activity. D) habitat loss.