Which of the following statement(s) accurately describe(s) tRNA?
A) It carries amino acids to the ribosome.
B) It contains codons.
C) It is transcribed from a DNA template.
D) all of the above
E) A and C only
E
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Genetic recombination involving insertion sequences typically results in what type of mutation?
A) base-pair substitution mutation B) silent mutation C) frameshift mutation D) base-pair deletion mutation
In terms of male parental care, the prevalence in animals groups goes in this order: _____ (most prevalent to least)
a. birds - mammals - fishes b. mammals - birds - fishes c. mammals - fishes - birds d. reptiles - mammals - fishes e. mammals - fishes - birds
In multiple sclerosis, a patient:a
loses coordination due to the replacement of myelin with scar tissue. b. accumulates neurofibrillary tangles in the brain resulting in dementia. c. suffers tremors due to overly rapid and spontaneous firing of neural impulses.
d. loses the ability to move because of motor neuron degeneration. e. suffers depression due to abnormal secretion of neurotransmitters
The hydrophobic tails of a phospholipid are composed of
A. fatty acids. B. phosphate. C. alcohol. D. glycerol. E. All of these choices are correct.