Which event could result in an inversion?
A) A 360° rotation of a chromosomal region following two double-strand breaks in a chromosome's DNA.
B) A crossover between two DNA sequences in different places on the same chromosome and that are inverted repeats of each other.
C) A crossover between two repeated DNA sequences that are in different places on the same chromosome and are oriented in the same direction.
D) A crossover between two repetitive sequences on different chromosomes.
B) A crossover between two DNA sequences in different places on the same chromosome and that are inverted repeats of each other.
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Epitokes of polychaetes are:
a. feeding structures. b. respiratory structures. c. reproductive individuals. d. excretory structures. e. feeding individuals.
The DNA sequence 5' ATGCCTGAATCAGCTTTA 3' could encode a maximum of ____ amino acids in a protein.
A) 5 B) 6 C) 7 D) 18
Transcription occurs ________ and translation occurs ________ of eukaryotic cells.
A) in the nucleus; in the cytoplasm B) in the cytoplasm; in the nucleus C) in the nucleus; at the cell membrane D) in the cytoplasm; at the cell membrane
When cells withdraw from the continuous cell cycle and enter a "quiescent" phase, which stage are they said to be in?
What will be an ideal response?