Indels are
A) index deletions used to identify a species.
B) parsimonious trees.
C) transitions and transversions combined.
D) small deletions or insertions that produce gaps in sequence alignments.
E) the result of codon usage bias.
D
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The release of neurotransmitter from the presynaptic cell is an example of:
A. phagocytosis. B. endocytosis. C. transcytosis. D. exocytosis.
If a gene is found in different groups, it is said to be
A. active. B. variable. C. conserved. D. associational. E. endogenous.
Which of the following is true of supercoiling?
A. The relaxed form of DNA is more stable and is therefore the preferred form in the cell. B. Most organisms maintain their DNA in a slightly overwound state in order to enhance strand separation during transcription and replication. C. Overwound DNA is in the B form so relaxed DNA has less turns than B-form DNA. D. Most organisms maintain their DNA in a slightly underwound state in order to compact their DNA. E. The relaxed form of DNA can only be maintained if the DNA is a closed circle.
In your Drosophila laboratory, you find a larva that is missing segments Lb, T1, T2, and T3. This larva probably has a mutation in a ___________ gene.
A. pair-rule B. gap C. maternal effect D. segment-polarity E. gap or segment-polarity