C.elegans is a model organism and was the first eukaryotic organism to have its genome sequenced
The free-living nematode is often used in laboratories investigating nervous system development with all 302 of its neurons and their effectors categorized. Interesting control mechanisms have been investigated with reproduction, particularly with egg-laying in the nematode. There are 16 muscles, 2 types of neurons, and multiple receptors involved in the process of laying eggs in C.elegans, and there are mutations in all of those structures for the study of the process. One particular mutation that prevents the laying of eggs by the worm is rescued by the neurotransmitter, serotonin. That rescue suggests that the mutation is most likely in which of the following? A) a post-synaptic neuron involved in egg-laying
B) a pre-synaptic neuron involved in egg-laying
C) a receptor for serotonin on cells needed for egg-laying
D) one of the muscles needed for egg-laying
B
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What is a cyclin?
A. a protein that activates kinases B. a protein whose levels change with the cell cycle C. a kinase D. Answers a and b are both correct.
The readout recorded in Pavlov's experiments on learning and feedforward regulation was:
A. how long the metronome ticked. B. amount of saliva collected. C. how quickly the dogs ate. D. amount of food the dogs ate.
Uranium-235, with a half-life of 713,000,000 years, decays to Lead-207. If a rock sample is determined to have one-quarter of the uranium-235 content it had when it formed, the age of the rock sample can be estimated to be approximately __________ years old.
A. 28.5 billion B. 713. million C. 1.4 billion D. 178 million
In RFLP, ___ enzymes are used to cut out the DNA sequence of interest.
What will be an ideal response?