Activated genes can be inactivated by reversing histone modification during a process called ____
a. chromatin remodeling
b. histone remodeling
c. chromatin interference
d. interference remodeling
e. histone interference
a
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What do all deuterostomes have in common?
A) Adults are bilaterally symmetrical. B) Embryos have pharyngeal pouches that may or may not form gill slits. C) All have a spinal column. D) All have specialized head and tail regions. E) The pore (blastopore) formed during gastrulation becomes the anus.
Answer the following statements true (T) or false (F)
1. Prokaryotic genomes often contain a circular chromosome with hundreds of thousands of genes and highly repetitive DNA. 2. In humans, the genome is made up of 22 autosomes and 1 sex chromosome. 3. On rare occasions, transposable elements contain a central region that encodes transposase, an enzyme that facilitates the actual transposition. 4. At the time that transposable elements were discovered by Barbara McClintock, many of her colleagues agreed with her discovery.
Mechanical digestion begins in the _______.
A) mouth B) large intestine C) stomach D) small intestine
Which of the following is a polymer?
A) wax B) steroid C) nucleic acid D) fat