Which of the following is a function of a tRNA molecule?
A) recognizing the appropriate anticodons in mRNA
B) transferring nucleotides to rRNA
C) helping to translate codons into nucleic acids
D) joining to only one specific type of amino acid
Answer: D
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Assume that two genes are 80 map units apart on chromosome II of Drosophila and that a cross is made between a doubly heterozygous female and a homozygous recessive male
What percent recombination would be expected in the offspring of this type of cross?
The first heart sound (lub) is produced by the closing of the __________ and __________ valves
a. aortic semilunar; pulmonary semilunar b. right atrioventricular; aortic semilunar c. left atrioventricular; pulmonary semilunar d. right atrioventricular; left atrioventricular e. mitral; left atrioventricular
Some sensory receptors decrease their frequency of action potentials when exposed to a continued, constant stimulus in
a process known as: a. transduction. b. sensory adaptation. c. referred perception. d. reception. e. sensory summation.
A(n)___________ is defined as a heritable change in the genetic material.
Fill in the blank(s) with the appropriate word(s).