What is the function of the lacY gene in the lac operon?
What will be an ideal response?
The lacY gene codes for permease, a membrane-bound protein that transports lactose into the bacterial cell.
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A hectare of wheat fixes 32,000 kg of carbon per year through photosynthesis and uses 7,000 kg of carbon per year for cellular respiration. The net primary productivity of the wheat field is therefore _____ kg of carbon/hectare/year.
Fill in the blank(s) with the appropriate word(s).
Which part of the spleen contains masses of lymphocytes?
a. nodes b. marrow c. red pulp d. white pulp e. clear pulp
High energy sources on early Earth, which were most likely involved in the origin of life, included:a
volcanic activity, lightning, and ultraviolet radiation. b. bombardment from meteorites, gamma radiation, and cosmic radiation. c. intense radiation, volcanic activity, and redox energy. d. oxidizing environment, electrical discharge, and geothermal energy. e. infrared radiation, ultraviolet radiation, and oxidizing radiation.
Any agent that causes damage to DNA is a potential ________
A) oncogene B) proto-oncogene C) pollutant D) carcinogen