The import of the transcription factor NFB into the nucleus is regulated by
a. a nuclease.
b. a protease.
c. a phospholipase.
d. a protein kinase.
Ans: d. a protein kinase.
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If the pH of the mouth becomes more acidic, which of the following is true?
a. All food types are broken down chemically. b. Amylase function decreases. c. Pepsin starts breaking down proteins. d. Amylase function increases.
________ are the leading cause of health-care-associated diseases.
A. Viruses B. Bacteria C. Protozoa D. Fungi
Which of the following accurately describes the sequence of tissues from the pith outward to the cork in a woody stem?
a. Secondary xylem, primary xylem, vascular cambium, cortex, primary phloem, secondary phloem, and cork cambium b. Primary xylem, secondary xylem, vascular cambium, secondary phloem, primary phloem, cortex, and cork cambium c. Primary xylem, secondary xylem, secondary phloem, primary phloem, cork cambium, cortex, and vascular cambium d. Primary xylem, secondary xylem, vascular cambium, primary phloem, secondary phloem, cortex, and cork cambium e. Cortex, secondary xylem, primary xylem, vascular cambium, primary phloem, secondary phloem, and cork cambium
Due to a mutation in the HEXA gene, a substance called GM2, normally present in the tissues and nerve cells of the brain, accumulates there. This mutation mainly effects enzymes associated with which organelle in an affected individuals' cells?
a. nucleus b. endoplasmic reticulum c. plasma membrane d. lysosomes