Which of the following statements about the mRNA start codon is INCORRECT?
A. The start codon is only a few nucleotides from the ribosomal binding site.
B. The start codon is usually GGA.
C. The start codon is usually AUG.
D. The start codon specifies the amino acid, methionine.
E. The start codon defines the reading frame.
B. The start codon is usually GGA.
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The forebrain includes which of the following
portions of the brain?
a. cerebrum, cerebellum, medulla oblongata b. pons, cerebellum, medulla oblongata c. cerebrum, thalamus, hypothalamus d. thalamus, hypothalamus, medulla oblongata e. corpus callosum, pons, medulla oblongata
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.
An individual with (naturally) curly hair and an individual with (naturally) straight hair mate; all of their offspring have (naturally) wavy hair. What is the relationship between the alleles for hair texture?
A) pleiotropy B) incomplete dominance C) wavy hair dominant to both straight and curly hair D) codominance
A peanut farmer decides that she can make more money growing cotton and so plants her fields with cotton. The terrific yield of her fields is so encouraging that she continues to plant cotton for several more years, but each year her cotton yield
decreases. What advice could you give her to increase her yield? A) Use a little less fertilizer each year since the soil is becoming overfertilized. B) Plant peanuts in alternate years since this crop rotation will provide extra nitrogen to the soil. C) Leave the fields unplanted in alternate years so the soil can recover. D) Plant a different crop every year since different crops deplete different soil nutrients.