An amino acid is synthesized by the prokaryote, e coli. the genes for the enzymes responsible for synthesizing this amino acid are encoded in an operon. the operon is regulated by a repressor. when the amino acid binds to the repressor, the repressor changes shape so it can bind to the operator. which of the following statements is true? a. when levels of the amino acid are high, it binds to the repressor, allowing synthesis of this amino acid to proceed. b. when levels of the amino acid are low, it binds to the repressor, allowing synthesis of this amino acid to proceed c. when levels of the amino acid are high they bind to the repressor ending the synthesis of this amino acid. d. when levels of the amino acid are low they bind to the repressor ending the synthesis of this amino acid.
Answers: 1
Biology, 21.06.2019 21:00, natasniebow
Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria
Answers: 1
Biology, 22.06.2019 00:40, abdullahs4639
World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course. a. 12.5m/s b. 1.33m/s c. 13.3m/s d. 1.25m/s
Answers: 3
Biology, 22.06.2019 02:00, naomicervero
Select the correct answer from each drop-down menu. in an experiment, dr. travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. the amount of calcium is variable. the risk of bone fractures .
Answers: 3
Biology, 22.06.2019 10:30, hhcfg
What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.
Answers: 1
An amino acid is synthesized by the prokaryote, e coli. the genes for the enzymes responsible for sy...
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