Which of the following is TRUE regarding how the DNA in your body's cells can accumulate mutations?
A) Some DNA spontaneously breaks down every second, making the chromosome significantly shorter with every passing day.
B) Spontaneous mutation rates are around one in every four nucleotides that are replicated.
C) The ultraviolet radiation in sunlight may induce changes in DNA.
D) Mistakes are never made during DNA replication; they always occur during the G1 phase of interphase.
C
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A transgenic organism has recombinant DNA integrated into its genome
Indicate whether the statement is true or false
When one plant is shaded by another, why is the ratio of far-red to red light increased compared to an unshaded plant?
A. Phytochrome in the taller plant absorbs most of the red light. B. Auxin absorbs mostly far-red light. C. As light passes through the leaves of the taller plant, most of the red light is absorbed by chlorophyll. D. Far-red light mostly reflects off the surface of the soil while red light is mostly absorbed. E. Shade is enriched in far-red wavelengths of light.
Which of the following is NOT a chelicerate?
a. tick b. mosquito c. spider d. horseshoe crab e. scorpion
In prokaryotes, inducers are small molecules that bind to _____ and _____ transcription.
a. activators; promote b. activators; inhibit c. repressors; promote d. repressors; inhibit e. None of the answer options is correct.