Which of the following is true of the protein ubiquitination pathway?
A. The ubiquitin carboxyl terminus is covalently linked to the protein targeted for degradation.
B. The ubiquitin is covalently linked to the amino terminus protein targeted for degradation.
C. The protein targeted for degradation is modified by three different enzymes in the pathway.
D. A single molecule of ubiquitin linked to the target protein is sufficient for destruction.
A
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Regulatory proteins
A) are influenced by small molecules. B) bind to specific DNA sites. C) regulate transcription. D) regulate transcription, bind specific DNA sites, and can be influenced by small molecules.
Prior to their release, where are the special chemicals called neurotransmitters stored in a neuron?
A) axon B) synaptic knob C) dendrites D) cell body
An area had no previous community and had no existing soil at first, but then living things started occupying the area. This situation would be called ________
A) biological magnification B) primary succession C) climax community D) secondary replacement
Than was recently laid off. His bills are now piling up, he hasn't found a new job yet, and his wife is pregnant. Which phase of the general adaptation syndrome is he MOST likely experiencing?
A. Resistance B. Alarm C. Exhaustion D. Burnout