Differentiate between primary, secondary, tertiary, and quaternary structure of proteins
What will be an ideal response?
Primary structure is the actual sequence of amino acids in the protein. Secondary structure includes the helices, sheets, and folds found in the original chain. Tertiary structure is the folding of secondary structure on itself. Quaternary structure includes the interactions among the differing polypeptide chains that compose some proteins.
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The herbicide is an example of a __________
a. risk factor b. carcinogen c. type of radiation d. chemotherapy
What is one of the very important differences between mitosis and meiosis?
a. Chromosomes align midway between spindle poles only in meiosis. b. Homologous chromosomes pair up and exchange genetic material only in meiosis. c. DNA is replicated only in mitosis. d. Sister chromatids separate only in meiosis. e. Interphase occurs only in mitosis.
In some smaller plant species, guttation is caused by __________.
A. Root pressure B. A decreased rate of active transport of ions into the stele C. Low root pressure D. An increased rate of transpiration at night E. The failure of stomata to close at night
Vitamin D can be synthesized by the body from a derivative of cholesterol. Given this information, predict vitamin D's solubility.
A. Vitamin D is fat soluble. B. Vitamin D is not soluble in either water or fat. C. Vitamin D is soluble in both water and fat. D. Vitamin D is water soluble.