Which of the following permits a single gene to code for more than one polypeptide?
alternative RNA splicing
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Aminoacyl-tRNA synthetases catalyze covalent addition of ________ to tRNAs.
Fill in the blank(s) with the appropriate word(s).
A and B are linked genes. In a study of 100 offspring, 94 had parental genotypes for A and B, while 6 were recombinants. A and B are ________ map units apart.
A) 4 B) 6 C) 9.4 D) 94
Which is the most common form of asexual reproduction in fungi?
a. budding b. binary fission c. formation of spores d. fragmentation
An individual with the condition of myasthenia gravis is faced with an autoimmune disorder in which the body defenses attack acetylcholine receptors on muscle cells
What would be the expected effect on calcium levels near contractile proteins, following the arrival of an electrical impulse at those neuromuscular junctions? A) a rapid decrease in concentration due to uptake by sarcoplasmic reticulum B) a rapid increase in concentration due to release by sarcoplasmic reticulum C) small or no increases in concentration due to weak responses by acetylcholine receptors D) a large decrease in concentration that occurs slowly E) a large increase in concentration that occurs slowly