Which of the following is not a part of the process of translation?
A. initiator tRNA binding to the ribosome
B. removal of introns from mRNA
C. mRNA binding to the ribosome
D. joining large and small ribosomal subunits
E. chain termination at a stop codon
Answer: B. removal of introns from mRNA
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The nitrogen-limitation hypothesis states that organisms select food in terms of the nitrogen content of the tissue. Why might this be true?
A. Because most organisms are able to "fix" nitrogen more efficiently than plants. B. Because foods with lower nitrogen content are easier for consumers to digest, leading most organisms to seek out low nitrogen foods. C. Because plant tissues contain, on average, 10 times the level of nitrogen needed by most consumers. D. Because many consumers need large amounts of nitrogen; for example, animal tissue contains about 10 times as much nitrogen as plant tissue. E. Because high nitrogen levels are a key part of plant chemical defenses, resulting in organisms avoiding high nitrogen plants.
With a scanning electron microscope, objects are generally magnified
a) 100 to 100,000x. b) 100 to 10,000x. c) 1,000 to 100,000x. d) 1,000 to 500,000x.
How can you determine the genotype of a plant showing the dominant phenotype of red color?
A. Cross the red plant with a white plant to see how many red plants appear. B. The phenotype reflects the genotype, so the plant must be homozygous for the trait. C. Cross the red plant with other red plants to see if any white plants appear. D. Cross the red plant with a white plant to see if any white plants appear. E. Cross the red plant with another red plant, and then cross the F1 population with each other to see if any white plants appear.
Compare and contrast cilia and flagella
What will be an ideal response?